Alert archive / Pennsylvania / Winter Storm Warnings in 2020

Winter Storm Warning 3, NWS State College, PA

December 15, 202032 counties in Pennsylvania

NWS State College, PA issued this winter storm warning at Dec 15, 2020, 4:30 AM EST for 32 counties in Pennsylvania. It took effect at Dec 16, 2020, 10:00 AM EST. It was in force for 21 hr. 60 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Dec 15, 2020, 4:30 AM EST (09:30 UTC)
In effect from
Dec 16, 2020, 10:00 AM EST
Expired
Dec 17, 2020, 7:18 AM EST
In force
21 hr
Issued by
NWS State College, PA
All 32 counties

Adams County, PA, Bedford County, PA, Blair County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clearfield County, PA, Clinton County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Elk County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Lancaster County, PA, Lebanon County, PA, Lycoming County, PA, McKean County, PA, Mifflin County, PA, Montour County, PA, Northumberland County, PA, Perry County, PA, Potter County, PA, Schuylkill County, PA, Snyder County, PA, Somerset County, PA, Sullivan County, PA, Tioga County, PA, Union County, PA, York County, PA

The radar

The State College radar (KCCX), 49 km from the middle of the area, began a volume at 09:35 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Dec 16, 10:30 AM ESTSNOW 156 Ene Wellsboro, PAREPORTED AT WHITNEYVILLE, PA.
Dec 16, 11:54 AM ESTSNOW 11.9Boalsburg, PA
Dec 16, 2:00 PM ESTSNOW 1Loganville, PA
Dec 16, 2:00 PM ESTSNOW 1.4Altoona, PA
Dec 16, 2:00 PM ESTSNOW 21 Ne Carlisle, PA
Dec 16, 2:00 PM ESTSNOW 24 Sse Willow Hill, PA
Dec 16, 2:00 PM ESTSNOW 2.52 Se Littlestown, PA
Dec 16, 2:10 PM ESTSNOW 1.53 Nne State College, PAMEASURED AT NWS STATE COLLEGE OFFICE.
Dec 16, 2:15 PM ESTSNOW 1.5Loganville, PA
Dec 16, 2:15 PM ESTSNOW 21 Ene Bellefonte, PA
Dec 16, 2:30 PM ESTSNOW 1.51 Nne Montandon, PA
Dec 16, 2:51 PM ESTSNOW 2.71 Nnw Park Forest, PA
Dec 16, 3:00 PM ESTSNOW 2.91 Nw Pleasant Gap, PA
Dec 16, 3:20 PM ESTSNOW 31 Sw Cashtown, PA
Dec 16, 3:23 PM ESTSNOW 3.31 Nw Park Forest, PA3.3 INCHES OF SNOW REPORTED IN PARK FOREST.
Dec 16, 3:30 PM ESTSNOW 2Mechanicsburg, PA
Dec 16, 3:30 PM ESTSNOW 2.12 Nw Stonybrook, PAREPORTED AT SPRINGETTSBURY TOWNSHIP, PA.
Dec 16, 3:30 PM ESTSNOW 31 Ene Bellefonte, PASINCE 11 AM.
Dec 16, 3:35 PM ESTSNOW 1.2Abbottstown, PA
Dec 16, 3:45 PM ESTSNOW 3Hanover, PA
Dec 16, 3:47 PM ESTSNOW 2.3Sunbury, PA
Dec 16, 3:50 PM ESTSNOW 3.54 Sse Willow Hill, PAREPORTED AT UPPER STRAUSBURG, PA.
Dec 16, 3:58 PM ESTSNOW 2.5Boalsburg, PA
Dec 16, 4:00 PM ESTSNOW 2Colonial Park, PAREPORTED AT COLONIAL PARK, PA.
Dec 16, 4:10 PM ESTSNOW 1.32 N Montoursville, PA
Dec 16, 4:12 PM ESTSNOW 3.51 Nw Pleasant Gap, PA
Dec 16, 4:12 PM ESTSNOW 4Newry, PAREPORTED AT NEWRY, PA.
Dec 16, 4:15 PM ESTSNOW 53 Se Port Matilda, PA
Dec 16, 4:15 PM ESTSNOW 5.3Seven Valleys, PAREPORTED AT SEVEN VALLEYS, PA.
Dec 16, 4:18 PM ESTSNOW 3Hershey, PA
Dec 16, 4:20 PM ESTSNOW 2.53 Nne Lawn, PA
Dec 16, 4:25 PM ESTSNOW 31 S Huntingdon, PAREPORTED AT HUNTINGDON, PA.
Dec 16, 4:25 PM ESTSNOW 3.71 Nnw State College, PAREPORTED AT UNIVERISTY PARK, PA.
Dec 16, 4:30 PM ESTSNOW 52 Wnw Brogue, PAREPORTED AT CHANCEFORD TOWNSHIP, YORK COUNTY, PA.
Dec 16, 4:30 PM ESTSNOW 6Hollidaysburg, PAREPORTED AT 16648.
Dec 16, 4:33 PM ESTSNOW 1.8Palmyra, PAREPORTED AT PALNYRA, PA.
Dec 16, 4:40 PM ESTSNOW 4.51 Wnw Philipsburg, PAREPORTED AT PHILLIPSBURG, CENTRE COUNTY, PA.
Dec 16, 4:45 PM ESTSNOW 3Mechanicsburg, PAREPORTED AT MECHANICSBURG, PA.
Dec 16, 4:45 PM ESTSNOW 7.52 Wnw Callimont, PAREPORTED AT 1849 GLADE CITY RD, SOMERSET PA.
Dec 16, 4:50 PM ESTSNOW 4.3Reedsville, PAREPORTED AT REEDSVILLE, PA.
Dec 16, 4:50 PM ESTSNOW 6State College, PAREPORTED AT 16801.
Dec 16, 4:51 PM ESTSNOW 4.52 W Park Forest, PAREPORTED AT GRAYS WOODS, PA.
Dec 16, 4:55 PM ESTSNOW 4.11 S Hanover, PAREPORTED AT HANOVER, PA.
Dec 16, 4:55 PM ESTSNOW 4.52 Ene Gettysburg, PAREPORTED AT 1061 YORK RD, GETTYSBURG, PA.
Dec 16, 4:55 PM ESTSNOW 4.71 S York, PA
Dec 16, 4:55 PM ESTSNOW 52 Ssw Nanty-Glo, PAREPORTED AT MUNDYS CORNER, PA.
Dec 16, 4:55 PM ESTSNOW 53 Nne Blue Knob State P, PAREPORTED AT BLUE KNOB, BEDFORD, PA.
Dec 16, 4:55 PM ESTSNOW 53 Wsw Newry, PAREPORTED AT PUZZLETOWN, PA.
Dec 16, 4:55 PM ESTSNOW 62 S Codorus, PAREPORTED AT GLENVILLE, PA.
Dec 16, 4:58 PM ESTSNOW 4.83 Se Brogue, PAREPORTED AT AIRVLLE, PA.
Dec 16, 5:00 PM ESTSNOW 1.8Palmyra, PACORRECTS PREVIOUS SNOW REPORT FROM PALMYRA.
Dec 16, 5:00 PM ESTSNOW 2.5Benton, PAREPORTED AT BENTON, PA.
Dec 16, 5:00 PM ESTSNOW 2.81 Sw Montandon, PAREPORTED AT RIVER RD, LEWISBURG, PA.
Dec 16, 5:00 PM ESTSNOW 3Annville, PA
Dec 16, 5:00 PM ESTSNOW 3Mechanicsburg, PACORRECTS PREVIOUS SNOW REPORT FROM MECHANICSBURG.
Dec 16, 5:00 PM ESTSNOW 3Montoursville, PAREPORTED AT MOUNTOURSVILLE, PA.
Dec 16, 5:00 PM ESTSNOW 4Colonial Park, PA
Dec 16, 5:00 PM ESTSNOW 4.1Hanover, PACHANGED OVER TO SLEET.
Dec 16, 5:00 PM ESTSNOW 4.91 S York, PA
Dec 16, 5:00 PM ESTSNOW 4.92 Sse New Cumberland, PAREPORTED AT CHERRY HILL, PA.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 9.5 hours before the alert went out and 197 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Washington/Dulle, VA at 00:00Z on 2020-12-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 2020-12-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1227 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
12 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

280 
WWUS41 KCTP 150930
WSWCTP

URGENT - WINTER WEATHER MESSAGE
National Weather Service State College PA
430 AM EST Tue Dec 15 2020

PAZ024-025-033-034-152130-
/O.UPG.KCTP.WS.A.0001.201216T1500Z-201217T1000Z/
/O.NEW.KCTP.WS.W.0003.201216T1500Z-201217T1200Z/
Cambria-Blair-Somerset-Bedford-
Including the cities of Johnstown, Altoona, Somerset, and Bedford
430 AM EST Tue Dec 15 2020

...WINTER STORM WARNING IN EFFECT FROM 10 AM WEDNESDAY TO 7 AM
EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 9 to 
  12 inches.

* WHERE...Cambria, Blair, Somerset and Bedford Counties.

* WHEN...From 10 AM Wednesday to 7 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the evening commute.

* ADDITIONAL DETAILS...Bands of heavy snow with accumulation rates
  of 1 to 3 inches per hour are likely Wednesday evening and
  Wednesday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow, post to the NWS State College Facebook page, use 
Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ026>028-035-036-056-057-059-063>066-152130-
/O.UPG.KCTP.WS.A.0001.201216T1500Z-201217T1500Z/
/O.NEW.KCTP.WS.W.0003.201216T1500Z-201217T1200Z/
Huntingdon-Mifflin-Juniata-Fulton-Franklin-Perry-Dauphin-Lebanon-
Cumberland-Adams-York-Lancaster-
Including the cities of Huntingdon, Mount Union, Lewistown, 
Mifflintown, McConnellsburg, Chambersburg, Newport, Harrisburg, 
Hershey, Lebanon, Carlisle, Gettysburg, York, and Lancaster
430 AM EST Tue Dec 15 2020

...WINTER STORM WARNING IN EFFECT FROM 10 AM WEDNESDAY TO 7 AM
EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 12 to 18 
  inches with locally higher amounts possible.

* WHERE...South central Pennsylvania.

* WHEN...From 10 AM Wednesday to 7 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning or evening 
  commute.

* ADDITIONAL DETAILS...Bands of heavy snow with accumulation rates
  of 2 to 3 inches per hour are likely Wednesday evening and
  Wednesday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ058-152130-
/O.UPG.KCTP.WS.A.0001.201216T1500Z-201217T1500Z/
/O.NEW.KCTP.WS.W.0003.201216T1700Z-201217T1500Z/
Schuylkill-
Including the city of Pottsville
430 AM EST Tue Dec 15 2020

...WINTER STORM WARNING IN EFFECT FROM NOON WEDNESDAY TO 10 AM
EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 12 to 18
  inches with locally higher amounts possible.

* WHERE...Schuylkill County.

* WHEN...From noon Wednesday to 10 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning or evening 
  commute.

* ADDITIONAL DETAILS...Bands of heavy snow with accumulation rates
  of 2 to 3 inches per hour are likely Wednesday evening and
  Wednesday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania 
Turnpike Commission strongly encourage motorists to heed all 
travel restrictions and delay unnecessary travel as significant 
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ012-018-019-041-042-045-046-049>053-152130-
/O.UPG.KCTP.WS.A.0001.201216T1700Z-201217T1500Z/
/O.NEW.KCTP.WS.W.0003.201216T1700Z-201217T1500Z/
Northern Clinton-Northern Centre-Southern Centre-
Northern Lycoming-Sullivan-Southern Clinton-Southern Lycoming-
Union-Snyder-Montour-Northumberland-Columbia-
Including the cities of Renovo, Philipsburg, State College, 
Trout Run, Laporte, Lock Haven, Williamsport, Lewisburg, 
Selinsgrove, Danville, Sunbury, Shamokin, Bloomsburg, and Berwick
430 AM EST Tue Dec 15 2020

...WINTER STORM WARNING IN EFFECT FROM NOON WEDNESDAY TO 10 AM
EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 11 to 17
  inches with locally higher amounts possible.

* WHERE...North central Pennsylvania.

* WHEN...From noon Wednesday to 10 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning or evening 
  commute.

* ADDITIONAL DETAILS...Bands of heavy snow with accumulation rates
  of 1 to 3 inches per hour are likely Wednesday evening and 
  Wednesday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow, post to the NWS State College Facebook page, use 
Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ010-011-152130-
/O.EXB.KCTP.WS.A.0001.201216T1700Z-201217T1200Z/
Elk-Cameron-
Including the cities of St. Marys, Ridgway, and Emporium
430 AM EST Tue Dec 15 2020

...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
THURSDAY MORNING...

* WHAT...Heavy snow possible. Total snow accumulations of 5 to 8 
  inches possible.

* WHERE...Elk and Cameron Counties.

* WHEN...From Wednesday afternoon through Thursday morning.

* IMPACTS...Heavy snow may make for very difficult to impossible 
  travel conditions, particularly for the Wednesday evening 
  commute through Wednesday night.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Review winter weather safety and preparedness information at 
weather.gov/winter.

The latest forecast information can be found on the
NWS State College Facebook page and Twitter @NWSStateCollege,
or on the web at weather.gov/ctp.

&&

$$

PAZ006-152130-
/O.EXA.KCTP.WS.A.0001.201216T1700Z-201217T1500Z/
Potter-
Including the city of Coudersport
430 AM EST Tue Dec 15 2020

...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
THURSDAY MORNING...

* WHAT...Heavy snow possible. Total snow accumulations of 5 to 
  10 inches possible.

* WHERE...Potter County.

* WHEN...From Wednesday afternoon through Thursday morning.

* IMPACTS...Heavy snow may make for very difficult to impossible 
  travel conditions, particularly for the Wednesday evening 
  commute through Wednesday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Review winter weather safety and preparedness information at 
weather.gov/winter.

The latest forecast information can be found on the
NWS State College Facebook page and Twitter @NWSStateCollege,
or on the web at weather.gov/ctp.

&&

$$

PAZ017-152130-
/O.EXT.KCTP.WS.A.0001.201216T1700Z-201217T1200Z/
Clearfield-
Including the cities of DuBois and Clearfield
430 AM EST Tue Dec 15 2020

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON 
THROUGH THURSDAY MORNING...

* WHAT...Heavy snow possible. Total snow accumulations of 5 to 10
  inches possible.

* WHERE...Clearfield, Cambria and Blair Counties.

* WHEN...From Wednesday afternoon through Thursday morning.

* IMPACTS...Heavy snow may make for very difficult travel 
  conditions, particularly for the Wednesday evening commute and 
  Wednesday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Review winter weather safety and preparedness information at 
weather.gov/winter.

The latest forecast information can be found on the NWS State
College Facebook page and Twitter @NWSStateCollege, or on the web
at weather.gov/ctp.

&&

$$

PAZ037-152130-
/O.CON.KCTP.WS.A.0001.201216T1700Z-201217T1500Z/
Tioga-
Including the cities of Mansfield and Wellsboro
430 AM EST Tue Dec 15 2020

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH THURSDAY MORNING...

* WHAT...Heavy snow possible. Total snow accumulations of 6 to 12
  inches possible.

* WHERE...Portions of central Pennsylvania.

* WHEN...From Wednesday afternoon through Thursday morning.

* IMPACTS...Heavy snow may make for very difficult to impossible 
  travel conditions, particularly for the Wednesday evening 
  commute through Wednesday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Review winter weather safety and preparedness information at 
weather.gov/winter.

The latest forecast information can be found on the NWS State
College Facebook page and Twitter @NWSStateCollege, or on the web
at weather.gov/ctp.

&&

$$
Colbert/Guseman
9 follow-up statements
423 
WWUS41 KCTP 151700
WSWCTP

URGENT - WINTER WEATHER MESSAGE
National Weather Service State College PA
1200 PM EST Tue Dec 15 2020

PAZ017-160600-
/O.UPG.KCTP.WS.A.0001.201216T1700Z-201217T1200Z/
/O.EXA.KCTP.WS.W.0003.201216T1700Z-201217T1500Z/
Clearfield-
Including the cities of DuBois and Clearfield
1200 PM EST Tue Dec 15 2020

...WINTER STORM WARNING IN EFFECT FROM NOON WEDNESDAY TO 10 AM
EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 8 to 12
  inches.

* WHERE...Clearfield County.

* WHEN...From noon Wednesday to 10 AM EST Thursday.

* IMPACTS...Heavy snow may make for very difficult travel 
  conditions, particularly for the Wednesday evening commute and 
  Wednesday night.

* ADDITIONAL DETAILS...Snowfall rates of up to 2 inches per hour 
  are expected late Wednesday and Wednesday night. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ037-160600-
/O.UPG.KCTP.WS.A.0001.201216T1700Z-201217T1500Z/
/O.EXA.KCTP.WS.W.0003.201216T1700Z-201217T1500Z/
Tioga-
Including the cities of Mansfield and Wellsboro
1200 PM EST Tue Dec 15 2020

...WINTER STORM WARNING IN EFFECT FROM NOON WEDNESDAY TO 10 AM
EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 8 to 
  13 inches.

* WHERE...Tioga County.

* WHEN...From noon Wednesday to 10 AM EST Thursday.

* IMPACTS...Heavy snow may make for very difficult to impossible 
  travel conditions, particularly for the Wednesday evening 
  commute through Wednesday night.

* ADDITIONAL DETAILS...Snowfall rates of up to 2 inches per hour 
  are expected late Wednesday and Wednesday night. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ024>028-033>036-056-057-059-063>066-160600-
/O.CON.KCTP.WS.W.0003.201216T1500Z-201217T1200Z/
Cambria-Blair-Huntingdon-Mifflin-Juniata-Somerset-Bedford-Fulton-
Franklin-Perry-Dauphin-Lebanon-Cumberland-Adams-York-Lancaster-
Including the cities of Johnstown, Altoona, Huntingdon, 
Mount Union, Lewistown, Mifflintown, Somerset, Bedford, 
McConnellsburg, Chambersburg, Newport, Harrisburg, Hershey, 
Lebanon, Carlisle, Gettysburg, York, and Lancaster
1200 PM EST Tue Dec 15 2020

...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 AM WEDNESDAY TO
7 AM EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 9 to 12
  inches to the west of the Interstate 99 corridor, and 12 to 18
  inches across the remainder of South-central Pennsylvania

* WHERE...The Southern half of Central Pennsylvania.

* WHEN...From 10 AM Wednesday to 7 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the evening commute.

* ADDITIONAL DETAILS...Bands of heavy snow with accumulation rates
  of 2 to 3 inches per hour are likely late Wednesday and 
  Wednesday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow, post to the NWS State College Facebook page, use
Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ012-018-019-041-042-045-046-049>053-058-160600-
/O.CON.KCTP.WS.W.0003.201216T1700Z-201217T1500Z/
Northern Clinton-Northern Centre-Southern Centre-
Northern Lycoming-Sullivan-Southern Clinton-Southern Lycoming-
Union-Snyder-Montour-Northumberland-Columbia-Schuylkill-
Including the cities of Renovo, Philipsburg, State College, 
Trout Run, Laporte, Lock Haven, Williamsport, Lewisburg, 
Selinsgrove, Danville, Sunbury, Shamokin, Bloomsburg, Berwick, 
and Pottsville
1200 PM EST Tue Dec 15 2020

...WINTER STORM WARNING REMAINS IN EFFECT FROM NOON WEDNESDAY TO
10 AM EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 12 to 
  18 inches with locally higher amounts possible.

* WHERE...Central Mountains, Middle Susquehanna Valley and Western
  Poconos. 

* WHEN...From noon Wednesday to 10 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning or evening 
  commute.

* ADDITIONAL DETAILS...Bands of heavy snow with accumulation 
  rates of 2 to 3 inches per hour are likely Wednesday evening 
  and Wednesday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ010-011-160600-
/O.CON.KCTP.WS.A.0001.201216T1700Z-201217T1200Z/
Elk-Cameron-
Including the cities of St. Marys, Ridgway, and Emporium
1200 PM EST Tue Dec 15 2020

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH THURSDAY MORNING...

* WHAT...Heavy snow possible. Total snow accumulations of 5 to 8 
  inches possible.

* WHERE...Elk and Cameron Counties.

* WHEN...From Wednesday afternoon through Thursday morning.

* IMPACTS...Heavy snow may make for very difficult to impossible 
  travel conditions, particularly for the Wednesday evening 
  commute through Wednesday night.

* ADDITIONAL DETAILS...The bulk of the snow will fall Wednesday
  night with snowfall rates around one inch per hour.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Review winter weather safety and preparedness information at
weather.gov/winter.

The latest forecast information can be found on the NWS State
College Facebook page and Twitter @NWSStateCollege, or on the web
at weather.gov/ctp.

&&

$$

PAZ006-160600-
/O.CON.KCTP.WS.A.0001.201216T1700Z-201217T1500Z/
Potter-
Including the city of Coudersport
1200 PM EST Tue Dec 15 2020

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH THURSDAY MORNING...

* WHAT...Heavy snow possible. Total snow accumulations of 5 to 
  10 inches possible.

* WHERE...Potter County.

* WHEN...From Wednesday afternoon through Thursday morning.

* IMPACTS...Heavy snow may make for very difficult to impossible 
  travel conditions, particularly for the Wednesday evening 
  commute through Wednesday night.

* ADDITIONAL DETAILS...The bulk of the snow will fall Wednesday
  night with snowfall rates around one inch per hour.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Review winter weather safety and preparedness information at
weather.gov/winter.

The latest forecast information can be found on the NWS State
College Facebook page and Twitter @NWSStateCollege, or on the web
at weather.gov/ctp.

&&

$$

Lambert/Travis
596 
WWUS41 KCTP 151923
WSWCTP

URGENT - WINTER WEATHER MESSAGE
National Weather Service State College PA
223 PM EST Tue Dec 15 2020

PAZ010-011-161100-
/O.UPG.KCTP.WS.A.0001.201216T1700Z-201217T1200Z/
/O.EXA.KCTP.WS.W.0003.201216T1700Z-201217T1500Z/
Elk-Cameron-
Including the cities of St. Marys, Ridgway, and Emporium
223 PM EST Tue Dec 15 2020

...WINTER STORM WARNING IN EFFECT FROM NOON WEDNESDAY TO 10 AM
EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 
  11 inches.

* WHERE...Elk and Cameron Counties.

* WHEN...From noon Wednesday to 10 AM EST Thursday.

* IMPACTS...Heavy snow may make for very difficult to impossible 
  travel conditions, particularly for the Wednesday evening 
  commute through Wednesday night.

* ADDITIONAL DETAILS...The bulk of the snow will fall Wednesday 
  night with snowfall rates around one inch per hour.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ006-161100-
/O.UPG.KCTP.WS.A.0001.201216T1700Z-201217T1500Z/
/O.EXA.KCTP.WS.W.0003.201216T1700Z-201217T1500Z/
Potter-
Including the city of Coudersport
223 PM EST Tue Dec 15 2020

...WINTER STORM WARNING IN EFFECT FROM NOON WEDNESDAY TO 10 AM
EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 
  11 inches.

* WHERE...Potter County.

* WHEN...From noon Wednesday to 10 AM EST Thursday.

* IMPACTS...Heavy snow may make for very difficult to impossible 
  travel conditions, particularly for the Wednesday evening 
  commute through Wednesday night.

* ADDITIONAL DETAILS...The bulk of the snow will fall Wednesday 
  night with snowfall rates around one inch per hour.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ024>028-033>036-056-057-059-063>066-161100-
/O.CON.KCTP.WS.W.0003.201216T1500Z-201217T1200Z/
Cambria-Blair-Huntingdon-Mifflin-Juniata-Somerset-Bedford-Fulton-
Franklin-Perry-Dauphin-Lebanon-Cumberland-Adams-York-Lancaster-
Including the cities of Johnstown, Altoona, Huntingdon, 
Mount Union, Lewistown, Mifflintown, Somerset, Bedford, 
McConnellsburg, Chambersburg, Newport, Harrisburg, Hershey, 
Lebanon, Carlisle, Gettysburg, York, and Lancaster
223 PM EST Tue Dec 15 2020

...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 AM WEDNESDAY TO
7 AM EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 9 to 
  12 inches to the west of the Interstate 99 corridor, and 12 to 
  18 inches across the remainder of South-central Pennsylvania.

* WHERE...The Southern half of Central Pennsylvania.

* WHEN...From 10 AM Wednesday to 7 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the evening commute.

* ADDITIONAL DETAILS...Bands of heavy snow with accumulation rates
  of 2 to 3 inches per hour are likely late Wednesday and
  Wednesday night. The heavy snow could mix with sleet for a time
  Wednesday night, holding down accumulations by several inches,
  mainly to the south and east of the Interstate 83/81 corridor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow, post to the NWS State College Facebook page, use
Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ012-017>019-037-041-042-045-046-049>053-058-161100-
/O.CON.KCTP.WS.W.0003.201216T1700Z-201217T1500Z/
Northern Clinton-Clearfield-Northern Centre-Southern Centre-Tioga-
Northern Lycoming-Sullivan-Southern Clinton-Southern Lycoming-
Union-Snyder-Montour-Northumberland-Columbia-Schuylkill-
Including the cities of Renovo, DuBois, Clearfield, Philipsburg, 
State College, Mansfield, Wellsboro, Trout Run, Laporte, 
Lock Haven, Williamsport, Lewisburg, Selinsgrove, Danville, 
Sunbury, Shamokin, Bloomsburg, Berwick, and Pottsville
223 PM EST Tue Dec 15 2020

...WINTER STORM WARNING REMAINS IN EFFECT FROM NOON WEDNESDAY TO
10 AM EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 12 to 
  18 inches with locally higher amounts possible.

* WHERE...Central Mountains, Middle Susquehanna Valley and Western
  Poconos. 

* WHEN...From noon Wednesday to 10 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the morning or evening 
  commute.

* ADDITIONAL DETAILS...Bands of heavy snow with accumulation 
  rates of 2 to 3 inches per hour are likely Wednesday evening 
  and Wednesday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ004-005-161100-
/O.NEW.KCTP.WW.Y.0018.201216T1700Z-201217T1200Z/
Warren-McKean-
Including the cities of Warren and Bradford
223 PM EST Tue Dec 15 2020

...WINTER WEATHER ADVISORY IN EFFECT FROM NOON WEDNESDAY TO 7 AM
EST THURSDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 7 
  inches.

* WHERE...Warren and McKean Counties.

* WHEN...From noon Wednesday to 7 AM EST Thursday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the evening commute.

* ADDITIONAL DETAILS...Most of the snow will fall late Wednesday
  and Wednesday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission remind motorists to adjust speeds based on
driving conditions as winter weather impacts will include snow
covered roads and limited visibility.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

Lambert/Travis
717 
WWUS41 KCTP 160413
WSWCTP

URGENT - WINTER WEATHER MESSAGE
National Weather Service State College PA
1113 PM EST Tue Dec 15 2020

PAZ024>028-033>036-056-057-059-063>066-161615-
/O.CON.KCTP.WS.W.0003.201216T1500Z-201217T1200Z/
Cambria-Blair-Huntingdon-Mifflin-Juniata-Somerset-Bedford-Fulton-
Franklin-Perry-Dauphin-Lebanon-Cumberland-Adams-York-Lancaster-
Including the cities of Johnstown, Altoona, Huntingdon, 
Mount Union, Lewistown, Mifflintown, Somerset, Bedford, 
McConnellsburg, Chambersburg, Newport, Harrisburg, Hershey, 
Lebanon, Carlisle, Gettysburg, York, and Lancaster
1113 PM EST Tue Dec 15 2020

...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 AM WEDNESDAY TO
7 AM EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 10 to 20
  inches with the highest totals between Harrisburg and
  Huntingdon. 

* WHERE...Southern Pennsylvania.

* WHEN...From 10 AM Wednesday to 7 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The
  hazardous conditions will impact the Wednesday evening commute.

* ADDITIONAL DETAILS...Bands of heavy snow with accumulation rates
  of 2 to 3 inches per hour are likely late Wednesday and
  Wednesday night. The heavy snow could mix with sleet for a time
  Wednesday night, mainly over York and Lancaster Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow, post to the NWS State College Facebook page, use
Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ006-010>012-017>019-037-041-042-045-046-049>053-058-161615-
/O.CON.KCTP.WS.W.0003.201216T1700Z-201217T1500Z/
Potter-Elk-Cameron-Northern Clinton-Clearfield-Northern Centre-
Southern Centre-Tioga-Northern Lycoming-Sullivan-Southern Clinton-
Southern Lycoming-Union-Snyder-Montour-Northumberland-Columbia-
Schuylkill-
Including the cities of Coudersport, St. Marys, Ridgway, 
Emporium, Renovo, DuBois, Clearfield, Philipsburg, State College,
Mansfield, Wellsboro, Trout Run, Laporte, Lock Haven, 
Williamsport, Lewisburg, Selinsgrove, Danville, Sunbury, 
Shamokin, Bloomsburg, Berwick, and Pottsville
1113 PM EST Tue Dec 15 2020

...WINTER STORM WARNING REMAINS IN EFFECT FROM NOON WEDNESDAY TO
10 AM EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 8 to 20
  inches with the highest amounts east of State College and
  Wellsboro.

* WHERE...Northern Pennsylvania.

* WHEN...From noon Wednesday to 10 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The
  hazardous conditions will impact the Wednesday evening and
  Thursday morning commutes. 

* ADDITIONAL DETAILS...Bands of heavy snow with accumulation 
  rates of 2 to 3 inches per hour are likely Wednesday evening 
  and Wednesday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ004-005-161615-
/O.CON.KCTP.WW.Y.0018.201216T1700Z-201217T1200Z/
Warren-McKean-
Including the cities of Warren and Bradford
1113 PM EST Tue Dec 15 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM NOON WEDNESDAY
TO 7 AM EST THURSDAY...

* WHAT...Snow expected. Total snow accumulations of 3 to 8 inches
  with the higher amounts to the east of Route 219.

* WHERE...McKean and Warren Counties.

* WHEN...From noon Wednesday to 7 AM EST Thursday.

* IMPACTS...Travel could be very difficult. The hazardous
  conditions could impact the Wednesday evening commute.

* ADDITIONAL DETAILS...Most of the snow will fall late Wednesday 
  and Wednesday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission remind motorists to adjust speeds based on
driving conditions as winter weather impacts will include snow
covered roads and limited visibility.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$
570 
WWUS41 KCTP 160920
WSWCTP

URGENT - WINTER WEATHER MESSAGE
National Weather Service State College PA
420 AM EST Wed Dec 16 2020

PAZ005-162200-
/O.UPG.KCTP.WW.Y.0018.201216T1700Z-201217T1200Z/
/O.EXA.KCTP.WS.W.0003.201216T1700Z-201217T1500Z/
McKean-
Including the city of Bradford
420 AM EST Wed Dec 16 2020

...WINTER STORM WARNING IN EFFECT FROM NOON TODAY TO 10 AM EST
THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 9
  inches.

* WHERE...McKean County.

* WHEN...From noon today to 10 AM EST Thursday.

* IMPACTS...Travel could be very difficult. The hazardous
  conditions could impact today's evening commute.

* ADDITIONAL DETAILS...Most of the snow will fall late today and
  tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ024>028-033>036-056-057-059-063>066-162200-
/O.CON.KCTP.WS.W.0003.201216T1500Z-201217T1200Z/
Cambria-Blair-Huntingdon-Mifflin-Juniata-Somerset-Bedford-Fulton-
Franklin-Perry-Dauphin-Lebanon-Cumberland-Adams-York-Lancaster-
Including the cities of Johnstown, Altoona, Huntingdon, 
Mount Union, Lewistown, Mifflintown, Somerset, Bedford, 
McConnellsburg, Chambersburg, Newport, Harrisburg, Hershey, 
Lebanon, Carlisle, Gettysburg, York, and Lancaster
420 AM EST Wed Dec 16 2020

...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING
TO 7 AM EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 10 to 20
  inches with the highest totals between Harrisburg, Huntingdon,
  and Lewistown.

* WHERE...Southern Pennsylvania.

* WHEN...From 10 AM today to 7 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The
  hazardous conditions will impact today's evening commute.

* ADDITIONAL DETAILS...Bands of heavy snow with accumulation rates
  of 2 to 3 inches per hour are likely late today and tonight. The
  heavy snow could mix with sleet for a time tonight, mainly over
  York and Lancaster Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow, post to the NWS State College Facebook page, use
Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ006-010>012-017>019-037-041-042-045-046-049>053-058-162200-
/O.CON.KCTP.WS.W.0003.201216T1700Z-201217T1500Z/
Potter-Elk-Cameron-Northern Clinton-Clearfield-Northern Centre-
Southern Centre-Tioga-Northern Lycoming-Sullivan-Southern Clinton-
Southern Lycoming-Union-Snyder-Montour-Northumberland-Columbia-
Schuylkill-
Including the cities of Coudersport, St. Marys, Ridgway, 
Emporium, Renovo, DuBois, Clearfield, Philipsburg, State College,
Mansfield, Wellsboro, Trout Run, Laporte, Lock Haven, 
Williamsport, Lewisburg, Selinsgrove, Danville, Sunbury, 
Shamokin, Bloomsburg, Berwick, and Pottsville
420 AM EST Wed Dec 16 2020

...WINTER STORM WARNING REMAINS IN EFFECT FROM NOON TODAY TO
10 AM EST THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 8 to 20
  inches with the highest amounts east of a line from State
  College, to Lock Haven and Wellsboro, with the lower end 
  amounts near the Route 219 corridor from Ridgway to Bradford.

* WHERE...Northern Pennsylvania.

* WHEN...From noon today to 10 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The
  hazardous conditions will impact today's evening and Thursday
  morning's commute.

* ADDITIONAL DETAILS...Bands of heavy snow with accumulation rates
  of 2 to 3 inches per hour are likely late today and tonight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ004-162200-
/O.CON.KCTP.WW.Y.0018.201216T1700Z-201217T1200Z/
Warren-
Including the city of Warren
420 AM EST Wed Dec 16 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO
7 AM EST THURSDAY...

* WHAT...Snow expected. Total snow accumulations of 3 to 6 inches.

* WHERE...McKean and Warren Counties.

* WHEN...From noon today to 7 AM EST Thursday.

* IMPACTS...Travel could be very difficult. The hazardous
  conditions could impact the today's evening commute.

* ADDITIONAL DETAILS...Most of the snow will fall late today and
  tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission remind motorists to adjust speeds based on
driving conditions as winter weather impacts will include snow
covered roads and limited visibility.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

Lambert/Colbert/Radzanowski
792 
WWUS41 KCTP 161751
WSWCTP

URGENT - WINTER WEATHER MESSAGE
National Weather Service State College PA
1251 PM EST Wed Dec 16 2020

PAZ024>028-033>036-056-057-059-063>066-170600-
/O.CON.KCTP.WS.W.0003.000000T0000Z-201217T1200Z/
Cambria-Blair-Huntingdon-Mifflin-Juniata-Somerset-Bedford-Fulton-
Franklin-Perry-Dauphin-Lebanon-Cumberland-Adams-York-Lancaster-
Including the cities of Johnstown, Altoona, Huntingdon, 
Mount Union, Lewistown, Mifflintown, Somerset, Bedford, 
McConnellsburg, Chambersburg, Newport, Harrisburg, Hershey, 
Lebanon, Carlisle, Gettysburg, York, and Lancaster
1251 PM EST Wed Dec 16 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 AM EST
THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 10 to 22 
  inches with the highest totals between Harrisburg, Huntingdon, 
  and Lewistown.

* WHERE...Southern Pennsylvania.

* WHEN...From 10 AM today to 7 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The
  hazardous conditions will impact this evening's commute.

* ADDITIONAL DETAILS...Bands of heavy snow with accumulation rates
  of 2 to 3 inches per hour are likely late this afternoon and 
  tonight. The heavy snow could mix with sleet for a time tonight,
  mainly over York and Lancaster Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow, post to the NWS State College Facebook page, use
Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ005-006-010>012-017>019-037-041-042-045-046-049>053-058-170600-
/O.CON.KCTP.WS.W.0003.000000T0000Z-201217T1500Z/
McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield-
Northern Centre-Southern Centre-Tioga-Northern Lycoming-Sullivan-
Southern Clinton-Southern Lycoming-Union-Snyder-Montour-
Northumberland-Columbia-Schuylkill-
Including the cities of Bradford, Coudersport, St. Marys, 
Ridgway, Emporium, Renovo, DuBois, Clearfield, Philipsburg, 
State College, Mansfield, Wellsboro, Trout Run, Laporte, 
Lock Haven, Williamsport, Lewisburg, Selinsgrove, Danville, 
Sunbury, Shamokin, Bloomsburg, Berwick, and Pottsville
1251 PM EST Wed Dec 16 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM EST
THURSDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 10 to 
  22 inches with the highest amounts east of a line from State 
  College, to Lock Haven and Wellsboro, with the lower end amounts
  near the Route 219 corridor from Ridgway to Bradford.

* WHERE...Northern Pennsylvania.

* WHEN...From noon today to 10 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions will impact today's evening and Thursday 
  morning's commute.

* ADDITIONAL DETAILS...Bands of heavy snow with accumulation rates
  of 2 to 3 inches per hour are likely late this afternoon and 
  tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ004-170600-
/O.CON.KCTP.WW.Y.0018.000000T0000Z-201217T1200Z/
Warren-
Including the city of Warren
1251 PM EST Wed Dec 16 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM EST
THURSDAY...

* WHAT...Snow expected. Total snow accumulations of 3 to 8 
  inches.

* WHERE...McKean and Warren Counties.

* WHEN...From noon today to 7 AM EST Thursday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the today's evening commute.

* ADDITIONAL DETAILS...Most of the snow will fall late this
  afternoon and tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission remind motorists to adjust speeds based on
driving conditions as winter weather impacts will include snow
covered roads and limited visibility.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$
198 
WWUS41 KCTP 170312
WSWCTP

URGENT - WINTER WEATHER MESSAGE
National Weather Service State College PA
1012 PM EST Wed Dec 16 2020

PAZ026>028-035-036-056-057-059-063>066-171200-
/O.CON.KCTP.WS.W.0003.000000T0000Z-201217T1200Z/
Huntingdon-Mifflin-Juniata-Fulton-Franklin-Perry-Dauphin-Lebanon-
Cumberland-Adams-York-Lancaster-
Including the cities of Huntingdon, Mount Union, Lewistown, 
Mifflintown, McConnellsburg, Chambersburg, Newport, Harrisburg, 
Hershey, Lebanon, Carlisle, Gettysburg, York, and Lancaster
1012 PM EST Wed Dec 16 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 AM EST
THURSDAY...

* WHAT...Heavy snow. Additional snow and sleet accumulations of 2
  to 7 inches. Total accumulations will range from 6 to 16 inches.
  Winds will be gusting into the 30s.

* WHERE...South-central Pennsylvania.

* WHEN...Until 7 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible
  overnight. The snow and sleet will be tapering off just before
  sunrise, but the snow-covered roads will likely still create 
  slowed travel for the morning commute. 

* ADDITIONAL DETAILS...Periods of heavy snow and sleet will last
  through most of the night. The highest snow totals will be to
  the north and west of Harrisburg. The wind will slacken later
  tonight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow, post to the NWS State College Facebook page, use
Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ005-006-010>012-017>019-037-041-042-045-046-049>053-058-171500-
/O.CON.KCTP.WS.W.0003.000000T0000Z-201217T1500Z/
McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield-
Northern Centre-Southern Centre-Tioga-Northern Lycoming-Sullivan-
Southern Clinton-Southern Lycoming-Union-Snyder-Montour-
Northumberland-Columbia-Schuylkill-
Including the cities of Bradford, Coudersport, St. Marys, 
Ridgway, Emporium, Renovo, DuBois, Clearfield, Philipsburg, 
State College, Mansfield, Wellsboro, Trout Run, Laporte, 
Lock Haven, Williamsport, Lewisburg, Selinsgrove, Danville, 
Sunbury, Shamokin, Bloomsburg, Berwick, and Pottsville
1012 PM EST Wed Dec 16 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM EST
THURSDAY...

* WHAT...Heavy snow. Additional snow accumulations of 4 to 12
  inches. Total snow accumulations of 10 to 24 inches. 

* WHERE...Portions of central Pennsylvania.

* WHEN...Until 10 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible. The snow
  will be pulling to the east of the area during the normal
  morning commute time and be done by 10 AM EST. Delay travel if
  possible. 

* ADDITIONAL DETAILS...Bands of heavy snow with accumulation rates
  of 2 to 3 inches per hour are occurring and will slide to the
  east through the night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ024-025-033-034-171200-
/O.CON.KCTP.WS.W.0003.000000T0000Z-201217T1200Z/
Cambria-Blair-Somerset-Bedford-
Including the cities of Johnstown, Altoona, Somerset, and Bedford
1012 PM EST Wed Dec 16 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 7 AM EST
THURSDAY...

* WHAT...Heavy snow. Additional snow accumulations of 2 to 6
  inches. Total accumulations will range from 8 to 16 inches. 

* WHERE...Cambria, Somerset, Bedford and Blair Counties.

* WHEN...Until 7 AM EST Thursday.

* IMPACTS...Travel could be very difficult to impossible
  overnight. The snow will pull off to the east later tonight and
  should be over right around sunrise. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow, post to the NWS State College Facebook page, use
Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$

PAZ004-171200-
/O.CON.KCTP.WW.Y.0018.000000T0000Z-201217T1200Z/
Warren-
Including the city of Warren
1012 PM EST Wed Dec 16 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM EST
THURSDAY...

* WHAT...Snow. Additional snow accumulations of 1 to 3 inches.
  Total accumulation of 4 to 6 inches.

* WHERE...Warren County.

* WHEN...Until 7 AM EST Thursday.

* IMPACTS...Travel could be very difficult overnight. 

* ADDITIONAL DETAILS...The snow should be off to the east before
  sunrise. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission remind motorists to adjust speeds based on
driving conditions as winter weather impacts will include snow
covered roads and limited visibility.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$
862 
WWUS41 KCTP 170940
WSWCTP

URGENT - WINTER WEATHER MESSAGE
National Weather Service State College PA
440 AM EST Thu Dec 17 2020

PAZ010-017>019-049-050-052-058-171045-
/O.CAN.KCTP.WS.W.0003.000000T0000Z-201217T1500Z/
Elk-Clearfield-Northern Centre-Southern Centre-Union-Snyder-
Northumberland-Schuylkill-
Including the cities of St. Marys, Ridgway, DuBois, Clearfield, 
Philipsburg, State College, Lewisburg, Selinsgrove, Sunbury, 
Shamokin, and Pottsville
440 AM EST Thu Dec 17 2020

...WINTER STORM WARNING IS CANCELLED...

Accumulating snow has ended over most of the area. If traveling
this morning, be aware that many roads remain snow covered, so
allow extra time to reach your destination.

$$

PAZ024>028-033>036-056-057-059-063>066-171045-
/O.CAN.KCTP.WS.W.0003.000000T0000Z-201217T1200Z/
Cambria-Blair-Huntingdon-Mifflin-Juniata-Somerset-Bedford-Fulton-
Franklin-Perry-Dauphin-Lebanon-Cumberland-Adams-York-Lancaster-
Including the cities of Johnstown, Altoona, Huntingdon, 
Mount Union, Lewistown, Mifflintown, Somerset, Bedford, 
McConnellsburg, Chambersburg, Newport, Harrisburg, Hershey, 
Lebanon, Carlisle, Gettysburg, York, and Lancaster
440 AM EST Thu Dec 17 2020

...WINTER STORM WARNING IS CANCELLED...

Accumulating snow has ended over most of the area. If traveling
this morning, be aware that many roads remain snow covered, so
allow extra time to reach your destination.

$$

PAZ004-171045-
/O.CAN.KCTP.WW.Y.0018.000000T0000Z-201217T1200Z/
Warren-
Including the city of Warren
440 AM EST Thu Dec 17 2020

...WINTER WEATHER ADVISORY IS CANCELLED...

Accumulating snow has ended over most of the area. If traveling
this morning, be aware that many roads remain snow covered, so
allow extra time to reach your destination.

$$

PAZ005-006-011-012-037-041-042-045-046-051-053-171300-
/O.EXT.KCTP.WS.W.0003.000000T0000Z-201217T1300Z/
McKean-Potter-Cameron-Northern Clinton-Tioga-Northern Lycoming-
Sullivan-Southern Clinton-Southern Lycoming-Montour-Columbia-
Including the cities of Bradford, Coudersport, Emporium, Renovo, 
Mansfield, Wellsboro, Trout Run, Laporte, Lock Haven, 
Williamsport, Danville, Bloomsburg, and Berwick
440 AM EST Thu Dec 17 2020

...WINTER STORM WARNING NOW IN EFFECT UNTIL 8 AM EST THIS
MORNING...

* WHAT...Heavy snow. Additional snow accumulations of up to two 
  inches.

* WHERE...Portions of north central Pennsylvania.

* WHEN...Until 8 AM EST this morning.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$
441 
WWUS41 KCTP 171136
WSWCTP

URGENT - WINTER WEATHER MESSAGE
National Weather Service State College PA
636 AM EST Thu Dec 17 2020

PAZ005-006-011-012-045-051-053-171245-
/O.CAN.KCTP.WS.W.0003.000000T0000Z-201217T1300Z/
McKean-Potter-Cameron-Northern Clinton-Southern Clinton-Montour-
Columbia-
Including the cities of Bradford, Coudersport, Emporium, Renovo, 
Lock Haven, Danville, Bloomsburg, and Berwick
636 AM EST Thu Dec 17 2020

...WINTER STORM WARNING IS CANCELLED...

Accumulating snow has ended over most of the area. If traveling
this morning, be aware that many roads remain snow covered, so
allow extra time to reach your destination.


$$

PAZ037-041-042-046-171300-
/O.CON.KCTP.WS.W.0003.000000T0000Z-201217T1300Z/
Tioga-Northern Lycoming-Sullivan-Southern Lycoming-
Including the cities of Mansfield, Wellsboro, Trout Run, Laporte,
and Williamsport
636 AM EST Thu Dec 17 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 AM EST THIS
MORNING...

* WHAT...Snow. Additional accumulations of less than an inch.

* WHERE...Tioga, Northern Lycoming, Sullivan and Southern 
  Lycoming Counties.

* WHEN...Until 8 AM EST this morning.

* IMPACTS...Plan on slippery road conditions for this morning's 
  commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel as significant
winter weather conditions will make travel very hazardous.

Call 5 1 1 or visit www.511pa.com for the latest travel, roadway
and traffic conditions.

To report snow or ice, post to the NWS State College Facebook
page, use Twitter @NWSStateCollege, or visit weather.gov/ctp.

&&

$$
003 
WWUS41 KCTP 171218
WSWCTP

URGENT - WINTER WEATHER MESSAGE
National Weather Service State College PA
718 AM EST Thu Dec 17 2020

PAZ037-041-042-046-171330-
/O.CAN.KCTP.WS.W.0003.000000T0000Z-201217T1300Z/
Tioga-Northern Lycoming-Sullivan-Southern Lycoming-
Including the cities of Mansfield, Wellsboro, Trout Run, Laporte,
and Williamsport
718 AM EST Thu Dec 17 2020

...WINTER STORM WARNING IS CANCELLED...

Accumulating snow has ended over most of the area. If traveling
this morning, be aware that many roads remain snow covered, so
allow extra time to reach your destination.

$$

What forecasters said that day

The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS State College, PA wrote its last area forecast discussion before this winter storm warning went out at Dec 15, 2:47 AM EST, 1 hour 43 minutes earlier.

Area forecast discussion, Dec 15, 2:47 AM EST, 1 hour 43 minutes before
Area Forecast Discussion
National Weather Service State College PA
247 AM EST Tue Dec 15 2020

.SYNOPSIS...
High pressure will build into the region today with tranquil
and chilly conditions, then a significant coastal storm will
affect central Pennsylvania Wednesday afternoon into Wednesday
night with widespread heavy snow likely.

&&

.NEAR TERM /THROUGH TUESDAY NIGHT/...
Satellite indicates abundant lake effect stratocu continues to
cover the western half of PA early this morning, while
subsidence east of the Appalachians results in mostly clear
skies across the lower Susquehanna Valley. Still can't rule out
a few light snow showers or flurries across the northwest
mountains overnight. However, low inversion heights indicate
little to no chance of any accumulation.

Weak cold advection and an active northwest breeze will result
in slowly falling temperatures this morning, with readings at
dawn likely ranging from the low to mid 20s in most parts of the
forecast area.

Dry weather and chilly conditions are expected Tuesday and
Tuesday night, as a large area of high pressure drifts east
from the Grt Lks into southern Quebec. Forecast soundings
indicate lake effect stratocu will hang tough for much of the
day over the northwest mountains. Otherwise, expect a decent
amount of sunshine, filtered at times by a bit of cirrus. Max
temps in the mid to upper 20s NW and upper 30s in the SE will be
a few degrees below normal.

Expect thickening cirrus to stream into the area late Tuesday
night ahead of southern stream trough lifting out of the Miss
Valley. Guidance supports seasonally chilly temperatures with
lows in the upper teens north, to the mid 20s over the southeast
counties.

&&

.SHORT TERM /WEDNESDAY THROUGH WEDNESDAY NIGHT/...
Midweek storm is showing increasing potential to bring
widespread significant impacts to Central Pennsylvania Wednesday
and Wednesday night.

Small variations in the storm track on the bulk of operational
models and EFS guidance are mainly distracting at this point.
The preponderance of guidance from man and machine is that we
will be in the bullseye for the highest snow amounts over all of
the eastern U.S. for this storm.

The changes overall to the Wednesday-night 24 hours are very
very small. But, as one forecaster said, we may end up breaking
the internet when we publish the first storm-total SF forecast
for the impending storm very shortly. The contours will go up to
20". The lowest numbers are in the NW. After collaboration with
WPC and the neighboring offices, we have settled on a Winter
Storm Watch for most of the CWA. We have left the NW 6-7
counties out for the time being, though their totals do look
like a good 4-6". Nothing to sneeze at, surely. The majority of
the snow will fall between 18Z Wed and 06Z Thurs, but we used
the rough 8" contour for the watch as a starting point as the
snow will probably be longer than that simple 12hr period.
There may be additions to the watch later today.

The synoptic setup is ideal with high pressure over eastern
Canada, an upper and increasingly-negatively-tilted trough
digging into the Ohio Valley, and a surface low expected to
rapidly deepen as it progresses off the eastern seaboard
overnight Wednesday as a full- blown nor'easter. Temperatures
will be cold enough across most of the region to support snow as
the primary precipitation type with potential for a mix of
snow/sleet/freezing rain to nudge their way into far
southeastern PA. Perhaps the only downside to this set up is the
progressive nature of the system - less than 24 hours of
precipitation it total. Regardless, this will be the most
significant snow storm since November 2018, and maximum snowfall
amounts will likely surpass the totals from just over 2 years
ago.

The vast array of model guidance continues to paint a compelling
picture of significant snowfall totals across much of the
Commonwealth. EC and GFS operational guidance point to localized
snowfall totals exceeding 1 foot with ensemble means in the
6-12 inch range. The National Blend of Models 50th percentile
snowfall amounts ending 12Z Thursday range from 6 to 12 inches,
with 8" snowfall exceedance probabilities of >70% in the
Susquehanna Valley. Wobbles in storm track are inevitable over
the next several days, but confidence continues increase in a
significant snow storm affecting the Commonwealth Wednesday and
Wednesday night.

Short of specific snowfall totals, here's what we know:
-Significant snowfall accumulations possible Wednesday and
 Wednesday night across portions of Central Pennsylvania.
-Significant travel disruptions from slippery, snow-covered
 roads and reduced visibility Wednesday late morning through the
 predawn hours on Thursday morning.
-Highest snowfall totals expected along a line from NW to SE
 somewhere between State College and Harrisburg, with local
 accumulations exceeding 1 foot.
-Snow exits by Thursday morning with fair and seasonably chilly
conditions to finish out the week.

Here's what will be ironed out in the coming days:
-Exact track of the surface low, which will determine corridor of
heaviest snowfall.
-Northward extent of warm air, which will determine where snow
 will mix with sleet/freezing rain and significantly reduce
 accumulations.
-Extent of dry air entrainment on the NW side as cold, dry air
surges in. This will have a big impact on the snowfall gradient in
NW PA.
-Reasonable range of snowfall totals: improved confidence based on
model ingestion of upper air soundings and dense observational
network on land as surface low takes shape.

&&

.LONG TERM /THURSDAY THROUGH MONDAY/...
Coastal low and associated snow should be exiting eastern Pa by
Thursday morning. The rest of Thursday looks chilly with plenty
of clouds, especially across the Alleghenies, as upper trough
swings into the region. Have added mention of scattered snow
showers Thursday night across the Alleghenies associated with
the passage of a shortwave diving through base of trough.

Confidence remains high for fair and seasonable conditions
Friday/Saturday, as upper ridge builds over the area. Latest
GEFS and ECENS support a chance of snow/rain showers late next
weekend with the passage of a weak cold front. A low tracking to
our west and trailing cold front could bring our next chance of
either rain or snow showers by late Monday or Monday night of
next week.

&&

.AVIATION /08Z TUESDAY THROUGH SATURDAY/...
Continuing to see some gusty winds early this morning, with
gusts anywhere from 15-25 knots. Ceilings currently in the
high-end MVFR to low-end VFR range across the Alleghenies should
gradually lift and thin out toward dawn as high pressure builds
farther east toward central PA. VFR conditions and northwest to
north winds of 10 knots or less then expected through this
afternoon.

Outlook...

Wed...Conditions trending down to MVFR and IFR with snow
developing.

Thu...Improving conditions.

Fri-Sat...Mainly VFR conditions.

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
Winter Storm Watch from Wednesday afternoon through Thursday
morning for PAZ012-018-019-037-041-042-045-046-049>053.
Winter Storm Watch from Wednesday morning through late
Wednesday night for PAZ017-024-025-033-034.
Winter Storm Watch from Wednesday morning through Thursday
morning for PAZ026>028-035-036-056>059-063>066.

&&

SYNOPSIS...Lambert
NEAR TERM...Guseman/Fitzgerald
SHORT TERM...Lambert/Dangelo
LONG TERM...Fitzgerald
AVIATION...Guseman/Martin/Colbert
Hazardous weather outlook, Dec 14, 8:24 PM EST, 8 hours 6 minutes before
Hazardous Weather Outlook
National Weather Service State College PA
824 PM EST Mon Dec 14 2020

PAZ004>006-010-011-151930-
Warren-McKean-Potter-Elk-Cameron-
824 PM EST Mon Dec 14 2020

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

A plowable snowfall is possible Wednesday and Wednesday night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ037-151930-
Tioga-
824 PM EST Mon Dec 14 2020

...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
THURSDAY MORNING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Winter Storm Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ012-018-019-041-042-045-046-049>053-151930-
Northern Clinton-Northern Centre-Southern Centre-Northern Lycoming-
Sullivan-Southern Clinton-Southern Lycoming-Union-Snyder-Montour-
Northumberland-Columbia-
824 PM EST Mon Dec 14 2020

...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH
THURSDAY MORNING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Winter Storm Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ017-024-025-033-034-151930-
Clearfield-Cambria-Blair-Somerset-Bedford-
824 PM EST Mon Dec 14 2020

...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH LATE
WEDNESDAY NIGHT...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Winter Storm Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ026>028-035-056-058-151930-
Huntingdon-Mifflin-Juniata-Fulton-Perry-Schuylkill-
824 PM EST Mon Dec 14 2020

...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH
THURSDAY MORNING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Winter Storm Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ036-057-059-063>066-151930-
Franklin-Dauphin-Lebanon-Cumberland-Adams-York-Lancaster-
824 PM EST Mon Dec 14 2020

...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH
THURSDAY MORNING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Winter Storm Watch.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

Martin

The office that day

Everything else NWS State College, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 15, 2:23 PM ESTWinter Weather AdvisoryCTPMcKean, Warren38 hr

Nearby

Winter Storm Warnings in Pennsylvania, 2020Every winter storm warning in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.