Alert archive / Pennsylvania / Winter Storm Warnings in 2018

Winter Storm Warning 4, NWS State College, PA

February 17, 20187 counties in Pennsylvania

NWS State College, PA issued this winter storm warning at Feb 17, 2018, 6:33 PM EST for 7 counties in Pennsylvania. It was in force for 9 hr. 38 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
Feb 17, 2018, 6:33 PM EST (23:33 UTC)
Expired
Feb 18, 2018, 4:00 AM EST
In force
9 hr
Issued by
NWS State College, PA

Counties Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Lebanon County, PA, Perry County, PA, Schuylkill County, PA, Somerset County, PA

The radar

The State College radar (KCCX), 96 km from the middle of the area, began a volume at 23:38 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
Feb 17, 6:44 PM ESTSNOW 3Greencastle, PA
Feb 17, 7:00 PM ESTSNOW 7.5New Bloomfield, PA
Feb 17, 7:06 PM ESTSNOW 6Millersburg, PA
Feb 17, 7:12 PM ESTSNOW 4Ashland, PA
Feb 17, 7:16 PM ESTSNOW 4Lebanon, PA
Feb 17, 7:16 PM ESTSNOW 5Upper Strasburg, PA
Feb 17, 7:18 PM ESTSNOW 7.3Orwigsburg, PA
Feb 17, 7:21 PM ESTSNOW 3.5Quincy, PA
Feb 17, 7:40 PM ESTSNOW 6Mechanicsburg, PA
Feb 17, 7:51 PM ESTSNOW 7Muir, PA
Feb 17, 8:03 PM ESTSNOW 6.3Tower City, PA
Feb 17, 8:14 PM ESTSNOW 6Summerdale, PA
Feb 17, 8:15 PM ESTSNOW 6Carlisle, PA
Feb 17, 8:16 PM ESTSNOW 6Auburn, PA
Feb 17, 8:52 PM ESTSNOW 3.8Somerset, PA
Feb 17, 9:05 PM ESTSNOW 3.71 N Falmouth, PA
Feb 17, 9:15 PM ESTSNOW 61 E Rockville, PA
Feb 17, 9:17 PM ESTSNOW 6Upper Strasburg, PA
Feb 17, 9:30 PM ESTSNOW 5Lebanon, PA
Feb 17, 9:30 PM ESTSNOW 6.5Millerstown, PA
Feb 17, 10:00 PM ESTSNOW 6.5Hegins, PA
Feb 17, 10:11 PM ESTSNOW 7Grantville, PA
Feb 17, 10:20 PM ESTSNOW 6Elizabethville, PA
Feb 17, 10:25 PM ESTSNOW 3.5Greencastle, PA
Feb 17, 10:30 PM ESTSNOW 6South Lebanon, PA
Feb 17, 10:45 PM ESTSNOW 7Pottsville, PA
Feb 17, 11:15 PM ESTSNOW 6.2Port Carbon, PA
Feb 17, 11:20 PM ESTSNOW 8Schuylkill Haven, PA
Feb 17, 11:23 PM ESTSNOW 8.2Schuylkill Haven, PA
Feb 17, 11:30 PM ESTSNOW 4.5Fountain Springs, PA
Feb 18, 12:00 AM ESTSNOW 3.4Harrisburg Internationa, PA
Feb 18, 12:00 AM ESTSNOW 52 W Lebanon, PA24-HOUR SNOWFALL.
Feb 18, 12:30 AM ESTSNOW 6Lake Wynonah, PA
Feb 18, 1:00 AM ESTSNOW 4.1Greencastle, PA
Feb 18, 3:30 AM ESTSNOW 8Orwigsburg, PA
Feb 18, 3:30 AM ESTSNOW 9South Tamaqua, PA
Feb 18, 4:00 AM ESTSNOW 4Mahanoy City, PA
Feb 18, 4:00 AM ESTSNOW 8Deer Lake, 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 12:00Z, 11.6 hours before the alert went out and 148 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 12:00Z on 2018-02-17Temperature 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 12:00Z on 2018-02-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.1939587897117136Sfc1 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
1256 m above ground
0-6 km bulk shear
84 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
198 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

671 
WWUS41 KCTP 172333
WSWCTP

URGENT - WINTER WEATHER MESSAGE
National Weather Service State College PA
633 PM EST Sat Feb 17 2018


PAZ057>059-180700-
/O.UPG.KCTP.WW.Y.0012.000000T0000Z-180218T0700Z/
/O.NEW.KCTP.WS.W.0004.180217T2333Z-180218T0600Z/
Dauphin-Schuylkill-Lebanon-
Including the cities of Harrisburg, Hershey, Pottsville, 
and Lebanon
633 PM EST Sat Feb 17 2018

...WINTER STORM WARNING IN EFFECT UNTIL 1 AM EST SUNDAY...

* WHAT...Heavy snow. Total snow accumulations of 5 to 7 inches 
  are expected.

* WHERE...Dauphin, Schuylkill and Lebanon Counties.

* WHEN...Until 1 AM EST Sunday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Be 
  prepared for significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel. Visit
www.511pa.com for the latest travel, roadway and traffic
conditions.

&&

$$

PAZ033-180745-
/O.UPG.KCTP.WW.Y.0012.000000T0000Z-180218T0900Z/
/O.NEW.KCTP.WS.W.0004.180217T2333Z-180218T0900Z/
Somerset-
Including the city of Somerset
633 PM EST Sat Feb 17 2018

...WINTER STORM WARNING IN EFFECT UNTIL 4 AM EST SUNDAY...

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

* WHERE...Somerset County.

* WHEN...Until 4 AM EST Sunday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Be 
  prepared for significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel. Visit
www.511pa.com for the latest travel, roadway and traffic
conditions.

&&

$$

PAZ036-180400-
/O.UPG.KCTP.WW.Y.0012.000000T0000Z-180218T0400Z/
/O.NEW.KCTP.WS.W.0004.180217T2333Z-180218T0400Z/
Franklin-
Including the city of Chambersburg
633 PM EST Sat Feb 17 2018

...WINTER STORM WARNING IN EFFECT UNTIL 11 PM EST THIS EVENING...

* WHAT...Heavy snow. Total snow accumulations of 4 to 6 inches are
  expected. Heaviest totals in the northern half of the county.

* WHERE...Franklin County.

* WHEN...Until 11 PM EST this evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Be 
  prepared for significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel. Visit
www.511pa.com for the latest travel, roadway and traffic
conditions.

&&

$$

PAZ056-063-180700-
/O.UPG.KCTP.WW.Y.0012.000000T0000Z-180218T0700Z/
/O.NEW.KCTP.WS.W.0004.180217T2333Z-180218T0400Z/
Perry-Cumberland-
Including the cities of Newport and Carlisle
633 PM EST Sat Feb 17 2018

...WINTER STORM WARNING IN EFFECT UNTIL 11 PM EST THIS EVENING...

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

* WHERE...Perry and Cumberland Counties.

* WHEN...Until 11 PM EST this evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Be 
  prepared for significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel. Visit
www.511pa.com for the latest travel, roadway and traffic
conditions.

&&

$$

PAZ027-028-050>053-180600-
/O.EXT.KCTP.WW.Y.0012.000000T0000Z-180218T0600Z/
Mifflin-Juniata-Snyder-Montour-Northumberland-Columbia-
Including the cities of Lewistown, Mifflintown, Selinsgrove, 
Danville, Sunbury, Shamokin, Bloomsburg, and Berwick
633 PM EST Sat Feb 17 2018

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 1 AM EST SUNDAY...

* WHAT...Snow. Total snow accumulations of 3 to 4 inches are 
  expected.

* WHERE...Portions of central Pennsylvania.

* WHEN...Until 1 AM EST Sunday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Be 
  prepared for reduced visibilities at times.

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 Pennsylvania
roadways. Visit www.511pa.com for the latest travel, roadway and
traffic conditions.

&&

$$

PAZ064>066-180600-
/O.EXT.KCTP.WW.Y.0012.000000T0000Z-180218T0600Z/
Adams-York-Lancaster-
Including the cities of Gettysburg, York, and Lancaster
633 PM EST Sat Feb 17 2018

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 1 AM EST SUNDAY...

* WHAT...Snow. Total snow accumulations of 3 to 5 inches are 
  expected.

* WHERE...Adams, York and Lancaster Counties.

* WHEN...Until 1 AM EST Sunday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Be 
  prepared for reduced visibilities at times.

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 Pennsylvania
roadways. Visit www.511pa.com for the latest travel, roadway and
traffic conditions.

&&

$$

PAZ024-180745-
/O.CON.KCTP.WW.Y.0012.000000T0000Z-180218T0900Z/
Cambria-
Including the city of Johnstown
633 PM EST Sat Feb 17 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM EST
SUNDAY...

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

* WHERE...Cambria County.

* WHEN...Until 4 AM EST Sunday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Be 
  prepared for reduced visibilities at times.

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 Pennsylvania
roadways. Visit www.511pa.com for the latest travel, roadway and
traffic conditions.

&&

$$

PAZ025-026-034-035-180400-
/O.CON.KCTP.WW.Y.0012.000000T0000Z-180218T0400Z/
Blair-Huntingdon-Bedford-Fulton-
Including the cities of Altoona, Huntingdon, Mount Union, 
Bedford, and McConnellsburg
633 PM EST Sat Feb 17 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM EST THIS
EVENING...

* WHAT...Snow. Total snow accumulations of 2 to 4 inches are 
  expected.

* WHERE...Blair, Huntingdon, Bedford and Fulton Counties.

* WHEN...Until 11 PM EST this evening.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Be 
  prepared for reduced visibilities at times.

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 Pennsylvania
roadways. Visit www.511pa.com for the latest travel, roadway and
traffic conditions.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/ctp
1 follow-up statement
554 
WWUS41 KCTP 180305
WSWCTP

URGENT - WINTER WEATHER MESSAGE
National Weather Service State College PA
1005 PM EST Sat Feb 17 2018


PAZ036-056-063-180415-
/O.CAN.KCTP.WS.W.0004.000000T0000Z-180218T0400Z/
Franklin-Perry-Cumberland-
Including the cities of Chambersburg, Newport, and Carlisle
1005 PM EST Sat Feb 17 2018

...WINTER STORM WARNING IS CANCELLED...

Little more than flurries will fall for the next few hours. No 
additional accumulations are expected.

$$

PAZ057-059-180415-
/O.CAN.KCTP.WS.W.0004.000000T0000Z-180218T0600Z/
Dauphin-Lebanon-
Including the cities of Harrisburg, Hershey, and Lebanon
1005 PM EST Sat Feb 17 2018

...WINTER STORM WARNING IS CANCELLED...

Little more than flurries will fall for the next few hours. No 
additional accumulations are expected.

$$

PAZ025-026-034-035-180415-
/O.CAN.KCTP.WW.Y.0012.000000T0000Z-180218T0400Z/
Blair-Huntingdon-Bedford-Fulton-
Including the cities of Altoona, Huntingdon, Mount Union, 
Bedford, and McConnellsburg
1005 PM EST Sat Feb 17 2018

...WINTER WEATHER ADVISORY IS CANCELLED...

Little more than flurries will fall for the next few hours. No 
additional accumulations are expected.

$$

PAZ027-028-050-064>066-180415-
/O.CAN.KCTP.WW.Y.0012.000000T0000Z-180218T0600Z/
Mifflin-Juniata-Snyder-Adams-York-Lancaster-
Including the cities of Lewistown, Mifflintown, Selinsgrove, 
Gettysburg, York, and Lancaster
1005 PM EST Sat Feb 17 2018

...WINTER WEATHER ADVISORY IS CANCELLED...

Little more than flurries will fall for the next few hours. No 
additional accumulations are expected.

$$

PAZ058-180600-
/O.CON.KCTP.WS.W.0004.000000T0000Z-180218T0600Z/
Schuylkill-
Including the city of Pottsville
1005 PM EST Sat Feb 17 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM EST SUNDAY...

* WHAT...Heavy snow. Additional snow accumulations of 1 to 2 
  inches are expected.

* WHERE...Schuylkill County.

* WHEN...Until 1 AM EST Sunday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Be 
  prepared for significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel. Visit
www.511pa.com for the latest travel, roadway and traffic
conditions.

&&

$$

PAZ033-180900-
/O.CON.KCTP.WS.W.0004.000000T0000Z-180218T0900Z/
Somerset-
Including the city of Somerset
1005 PM EST Sat Feb 17 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM EST SUNDAY...

* WHAT...Heavy snow. Additional snow accumulations of 1 to 3
  inches are expected.

* WHERE...Somerset County.

* WHEN...Until 4 AM EST Sunday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Be 
  prepared for significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission strongly encourage motorists to heed all
travel restrictions and delay unnecessary travel. Visit
www.511pa.com for the latest travel, roadway and traffic
conditions.

&&

$$

PAZ024-180900-
/O.CON.KCTP.WW.Y.0012.000000T0000Z-180218T0900Z/
Cambria-
Including the city of Johnstown
1005 PM EST Sat Feb 17 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM EST
SUNDAY...

* WHAT...Snow. Additional snow accumulations of up to two inches 
  are expected.

* WHERE...Cambria County.

* WHEN...Until 4 AM EST Sunday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Be 
  prepared for reduced visibilities at times.

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 Pennsylvania
roadways. Visit www.511pa.com for the latest travel, roadway and
traffic conditions.

&&

$$

PAZ051>053-180600-
/O.CON.KCTP.WW.Y.0012.000000T0000Z-180218T0600Z/
Montour-Northumberland-Columbia-
Including the cities of Danville, Sunbury, Shamokin, Bloomsburg, 
and Berwick
1005 PM EST Sat Feb 17 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST
SUNDAY...

* WHAT...Snow. Additional snow accumulations of an inch or so is
  expected.

* WHERE...Montour, Northumberland and Columbia Counties.

* WHEN...Until 1 AM EST Sunday.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Be 
  prepared for reduced visibilities at times.

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 Pennsylvania
roadways. Visit www.511pa.com for the latest travel, roadway and
traffic conditions.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/ctp

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 Feb 17, 2:21 PM EST, 4 hours 12 minutes earlier.

Area forecast discussion, Feb 17, 2:21 PM EST, 4 hours 12 minutes before
Area Forecast Discussion
National Weather Service State College PA
221 PM EST Sat Feb 17 2018

.SYNOPSIS...
Low pressure will track northeastward to the Mid Atlantic coast
by this evening. An anomalous upper level ridge will build off
the east coast next week, with a dying cold front pushing into
the state on Wednesday. Abnormally mild conditions will prevail
for much of next week. Temperatures will be more typical of
early Spring than mid Winter.

&&

.NEAR TERM /THROUGH TONIGHT/...
Clouds lowering and thickening at mid afternoon with snow
breaking out from southwest to northeast across the southern
half of central PA. Timing slightly ahead of earlier thinking,
but overall scenario in good shape with a widespread 2-4"
snowfall for most south of I80, 1 to 3 inches north, and locally
5 or 6 possible in a stripe from the South Central Mountains
through the Lower Susq. where some 1" per hour snowfall rates
are possible late this afternoon through early this evening as
jet entrance region enhances the snowfall there for a few hours.
All snow expected except for the possible exception of far
southern Lancaster and York Counties which may mix with or
change to rain later this evening.

Expect the accumulating snow to taper off rather quickly in the
mid evening hours as low pressure passes off the Delmarva.
Lighter orographic snow is likely to linger over the
Alleghenies until after midnight with flurries continuing there
afterwards into the pre dawn hours.

&&

.SHORT TERM /SUNDAY/...
Freshly fallen snow and high pressure will make for a pretty
Sunday morning. Enjoy the snow cover while it lasts though
because afternoon temperatures will rise to the lower to middle
40s central and south, and even upper 30s north, promoting
plenty of melting. Early morning stratus over the
north...otherwise mostly sunny skies expected throughout the
day.

&&

.LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/...
Made minor changes to the fcst package.

Main thing for Sunday night was to lower temperatures...given
new guidance and also that some snow will likely result in
temperatures falling off quickly after sunset.

Took out rain for early Monday morning...except for the far
southwest. This area likely to be above freezing. Points
further east will see rain later on Monday morning...given
time for temperatures to rise above freezing.

QPF for Monday and Monday night will be much lighter than the
event we had Thursday evening, as the warm front lifts quickly
northward.

Overall an anomalous upper ridge builds along the east coast
next week. Heights rise to 588 across southern PA at 500 mb
Tuesday. Much of the area will be well into the 60s Tuesday and
Wednesday...but could warm well into the 70s if winds mix down.

Slightly cooler later in the week...as a cold front slips
southward into the area...as high pressure builds over eastern
Canada and New England. Models keep the basic pattern the
same...so by next weekend...mild conditions could return.

&&

.AVIATION /20Z SATURDAY THROUGH THURSDAY/...
Snow into far southwestern PA now.

VFR conditions will quickly give way to MVFR and IFR conditions
by late afternoon and early evening...as snow moves into our
area.

Conditions should improve across eastern areas shortly after
Midnight...as the storm quickly moves out of the area. Some
lower clouds and light snow showers could linger across the
central and western areas to just after sunrise on Sunday.

Overall...not a bad day for Sunday. Lots of sun by late morning.
Winds will die down by late aft.

Some showers and lower clouds next week...mainly for a brief
time Monday...and later on Wednesday...but much of the time will
be dry with VFR conditions. Also on the mild side.

Outlook...

Mon...Restrictions return with some light rain.

Tue-Wed...Restrictions likely in rain showers, mainly NW at
times...and late Wed elsewhere.

Thu...Clearing north. Still a chance of showers north.

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory until 2 AM EST Sunday for PAZ027-028-
050>053-056>059-063>066.
Winter Weather Advisory until 4 AM EST Sunday for PAZ024-033.
Winter Weather Advisory until 11 PM EST this evening for
PAZ025-026-034>036.

&&

SYNOPSIS...DeVoir/Martin
NEAR TERM...DeVoir/Fitzgerald
SHORT TERM...DeVoir
LONG TERM...Martin
AVIATION...Martin
Hazardous weather outlook, Feb 17, 6:33 PM EST, 0 minutes before
Hazardous Weather Outlook
National Weather Service State College PA
633 PM EST Sat Feb 17 2018

PAZ027-028-050>053-064>066-182345-
Mifflin-Juniata-Snyder-Montour-Northumberland-Columbia-Adams-York-
Lancaster-
633 PM EST Sat Feb 17 2018

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 1 AM EST SUNDAY...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

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

   Winter Weather Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ004>006-010>012-017>019-037-041-042-045-046-049-182345-
Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield-
Northern Centre-Southern Centre-Tioga-Northern Lycoming-Sullivan-
Southern Clinton-Southern Lycoming-Union-
633 PM EST Sat Feb 17 2018

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ036-056-063-182345-
Franklin-Perry-Cumberland-
633 PM EST Sat Feb 17 2018

...WINTER STORM WARNING IN EFFECT UNTIL 11 PM EST THIS EVENING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

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

   Winter Storm Warning.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ024-182345-
Cambria-
633 PM EST Sat Feb 17 2018

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 AM EST SUNDAY...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

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

   Winter Weather Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ025-026-034-035-182345-
Blair-Huntingdon-Bedford-Fulton-
633 PM EST Sat Feb 17 2018

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 11 PM EST THIS EVENING...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

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

   Winter Weather Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ033-182345-
Somerset-
633 PM EST Sat Feb 17 2018

...WINTER STORM WARNING IN EFFECT UNTIL 4 AM EST SUNDAY...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

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

   Winter Storm Warning.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ057>059-182345-
Dauphin-Schuylkill-Lebanon-
633 PM EST Sat Feb 17 2018

...WINTER STORM WARNING IN EFFECT UNTIL 1 AM EST SUNDAY...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Tonight.

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

   Winter Storm Warning.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

In the hours before

Local storm report, Feb 17, 4:29 PM EST, 2 hours 4 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE STATE COLLEGE PA
429 PM EST SAT FEB 17 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0405 PM     SNOW             ROARING SPRING          40.33N  78.40W
02/17/2018  M2.0 INCH        BLAIR              PA   TRAINED SPOTTER

0420 PM     SNOW             MILLERSBURG             40.54N  76.96W
02/17/2018  M2.0 INCH        DAUPHIN            PA   PUBLIC

0420 PM     SNOW             2 N BEDFORD             40.04N  78.50W
02/17/2018  E3.0 INCH        BEDFORD            PA   PUBLIC

            NEAR BEDFORD COUNTY AIRPORT

0427 PM     SNOW             HUNTINGDON              40.50N  78.01W
02/17/2018  M2.0 INCH        HUNTINGDON         PA   PUBLIC

&&

EVENT NUMBER CTP1800562 CTP1800563 CTP1800565 CTP1800564

EVANEGO
Special weather statement, Feb 17, 4:32 PM EST, 2 hours 1 minute before
Special Weather Statement
National Weather Service State College PA
432 PM EST SAT FEB 17 2018

PAZ035-036-057-059-063>066-172230-
York PA-Lancaster PA-Fulton PA-Adams PA-Franklin PA-Cumberland PA-
Lebanon PA-Dauphin PA-
432 PM EST SAT FEB 17 2018

...A BAND OF HEAVY SNOW WILL AFFECT MUCH OF YORK...LANCASTER...
FULTON...ADAMS...FRANKLIN...CUMBERLAND...LEBANON...AND DAUPHIN
COUNTIES...

HAZARD...A band of heavy snow which can rapidly reduce visibility to
         less than a quarter of a mile. This band of heavy snow is
         producing extremely heavy snow at the rate of 1 to 2 inches
         per hour.

LOCATION AND MOVEMENT...At 430 PM EST, a band of heavy snow was
along a line extending from Myerstown to Warfordsburg and moving
east at 50 MPH.

This band will cross the following Interstates...
 Interstate 70 from mile markers 156 to 170.
 The Pennsylvania Turnpike from mile markers 226 to 295.
 Interstate 78 from mile markers 0 to 8.
 Interstate 81 between mile markers 0 and 89.
 Interstate 83 from mile markers 1 to 50.
 Interstate 283 from mile markers 0 to 2.

SAFETY INFO...
Use extra caution if you must travel into or through this band of
heavy snow. Rapid changes in visibility and potentially slick roads
are likely to lead to accidents. Consider delaying travel until this
band of heavy snow passes your location.

The snow will accumulate so rapidly that it will be extremely
difficult for the road crews to keep the roads clear.

&&

LAT...LON 3987 7828 4047 7640 4014 7587 4010 7594
      4004 7594 3994 7600 3972 7670 3972 7838
TIME...MOT...LOC 2130Z 274DEG 44KT 4037 7628 3978 7817

Dangelo
Local storm report, Feb 17, 5:14 PM EST, 1 hour 19 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE STATE COLLEGE PA
514 PM EST SAT FEB 17 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0405 PM     SNOW             ROARING SPRING          40.33N  78.40W
02/17/2018  M2.0 INCH        BLAIR              PA   TRAINED SPOTTER

0420 PM     SNOW             MILLERSBURG             40.54N  76.96W
02/17/2018  M2.0 INCH        DAUPHIN            PA   PUBLIC

0420 PM     SNOW             2 N BEDFORD             40.04N  78.50W
02/17/2018  E3.0 INCH        BEDFORD            PA   PUBLIC

            NEAR BEDFORD COUNTY AIRPORT

0427 PM     SNOW             HUNTINGDON              40.50N  78.01W
02/17/2018  M2.0 INCH        HUNTINGDON         PA   PUBLIC

0437 PM     SNOW             LANDISBURG              40.34N  77.31W
02/17/2018  E3.0 INCH        PERRY              PA   TRAINED SPOTTER

0440 PM     SNOW             SHIPPENSBURG            40.05N  77.52W
02/17/2018  M1.0 INCH        CUMBERLAND         PA   SOCIAL MEDIA

0452 PM     SNOW             ALLENSVILLE             40.53N  77.81W
02/17/2018  E1.5 INCH        MIFFLIN            PA   PUBLIC

0457 PM     SNOW             UPPER STRASBURG         40.02N  77.70W
02/17/2018  M2.5 INCH        FRANKLIN           PA   CO-OP OBSERVER

0505 PM     SNOW             SPRING RUN              40.14N  77.77W
02/17/2018  M2.0 INCH        FRANKLIN           PA   SOCIAL MEDIA

&&

EVENT NUMBER CTP1800562 CTP1800563 CTP1800565 CTP1800564 CTP1800566
CTP1800567 CTP1800568 CTP1800569 CTP1800570

EVANEGO
Special weather statement, Feb 17, 5:40 PM EST, 53 minutes before
Special Weather Statement
National Weather Service State College PA
540 PM EST SAT FEB 17 2018

PAZ036-056-057-059-063>066-172330-
Perry PA-York PA-Lancaster PA-Adams PA-Franklin PA-Cumberland PA-
Lebanon PA-Dauphin PA-
540 PM EST SAT FEB 17 2018

...AN AREA OF HEAVY SNOW WILL AFFECT PARTS OF PERRY...YORK...
LANCASTER...ADAMS...FRANKLIN...CUMBERLAND...LEBANON...AND DAUPHIN
COUNTIES...

HAZARDS...An area of heavy snow which can rapidly reduce visibility
to less than a quarter of a mile. This area of heavy snow is
producing extremely heavy snow at the rate of 1 to 2 inches per hour.

LOCATION AND MOVEMENT...At 536 PM EST, an area of heavy snow was
covering much of the lower Susquehanna Valley. The area of snow is
moving very little, but an edge to the heavier snow is moving
through the south-central mountains. That should decrease the
intensity of the snow from west to east over the next 2 hours.
However, locations southeast of Harrisburg could have the snow
intensify before tapering off later this evening.

SAFETY INFO...Use extra caution if you must travel into or through
this area of heavy snow. Rapid changes in visibility and potentially
slick roads are likely to lead to accidents. Consider delaying
travel until this area of heavy snow diminishes or moves to the east.

&&

LAT...LON 3973 7803 4034 7758 4049 7643 4014 7587
      4010 7594 4004 7594 3996 7599 3987 7599
      3973 7610
TIME...MOT...LOC 2236Z 274DEG 49KT 4009 7672

Dangelo
Local storm report, Feb 17, 6:22 PM EST, 11 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE STATE COLLEGE PA
622 PM EST SAT FEB 17 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0420 PM     SNOW             2 N BEDFORD             40.04N  78.50W
02/17/2018  E3.0 INCH        BEDFORD            PA   PUBLIC

            NEAR BEDFORD COUNTY AIRPORT

0427 PM     SNOW             HUNTINGDON              40.50N  78.01W
02/17/2018  M2.0 INCH        HUNTINGDON         PA   PUBLIC

0437 PM     SNOW             LANDISBURG              40.34N  77.31W
02/17/2018  E3.0 INCH        PERRY              PA   TRAINED SPOTTER

0440 PM     SNOW             SHIPPENSBURG            40.05N  77.52W
02/17/2018  M1.0 INCH        CUMBERLAND         PA   SOCIAL MEDIA

0452 PM     SNOW             ALLENSVILLE             40.53N  77.81W
02/17/2018  E1.5 INCH        MIFFLIN            PA   PUBLIC

0457 PM     SNOW             UPPER STRASBURG         40.02N  77.70W
02/17/2018  M2.5 INCH        FRANKLIN           PA   CO-OP OBSERVER

0505 PM     SNOW             SPRING RUN              40.14N  77.77W
02/17/2018  M2.0 INCH        FRANKLIN           PA   SOCIAL MEDIA

0511 PM     SNOW             CARLISLE                40.20N  77.20W
02/17/2018  M2.8 INCH        CUMBERLAND         PA   PUBLIC

0520 PM     SNOW             2 SSW JOHNSTOWN         40.30N  78.93W
02/17/2018  M3.5 INCH        CAMBRIA            PA   BROADCAST MEDIA

0522 PM     SNOW             AUBURN                  40.60N  76.10W
02/17/2018  E4.0 INCH        SCHUYLKILL         PA   PUBLIC

0530 PM     SNOW             MANHEIM                 40.16N  76.40W
02/17/2018  M1.5 INCH        LANCASTER          PA   TRAINED SPOTTER

0548 PM     SNOW             1 E ROCKVILLE           40.32N  76.88W
02/17/2018  M3.3 INCH        DAUPHIN            PA   SOCIAL MEDIA

            ATOP BLUE MOUNTAIN

0559 PM     SNOW             NWS STATE COLLEGE       40.83N  77.85W
02/17/2018  M1.5 INCH        CENTRE             PA   NWS OFFICE

0605 PM     SNOW             SHAMOKIN                40.79N  76.55W
02/17/2018  M1.0 INCH        NORTHUMBERLAND     PA   PUBLIC

            COAL TOWNSHIP

0608 PM     SNOW             MILLERSBURG             40.54N  76.96W
02/17/2018  M5.5 INCH        DAUPHIN            PA   PUBLIC

0614 PM     SNOW             CARLISLE                40.20N  77.20W
02/17/2018  M4.7 INCH        CUMBERLAND         PA   PUBLIC

0616 PM     SNOW             2 N ENOLA               40.32N  76.94W
02/17/2018  M5.0 INCH        CUMBERLAND         PA   SOCIAL MEDIA

0620 PM     SNOW             MECHANICSBURG           40.21N  77.01W
02/17/2018  M4.5 INCH        CUMBERLAND         PA   PUBLIC

0620 PM     SNOW             LEMOYNE                 40.24N  76.90W
02/17/2018  M4.5 INCH        CUMBERLAND         PA   SOCIAL MEDIA

0622 PM     SNOW             ROARING SPRING          40.33N  78.40W
02/17/2018  M4.0 INCH        BLAIR              PA   SOCIAL MEDIA

&&

EVENT NUMBER CTP1800565 CTP1800564 CTP1800566 CTP1800567 CTP1800568
CTP1800569 CTP1800570 CTP1800577 CTP1800571 CTP1800578 CTP1800572
CTP1800575 CTP1800579 CTP1800580 CTP1800581 CTP1800582 CTP1800583
CTP1800584 CTP1800585 CTP1800586

EVANEGO

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 16, 7:14 PM ESTWinter Weather AdvisoryCTPAdams, Bedford, Blair, Cambria, Columbia, Cumberland and 15 more33 hr
Feb 17, 4:32 PM ESTSpecial Weather StatementCTPAdams, Cumberland, Franklin, Fulton, Lancaster, Lebanon and 1 more58 min
Feb 17, 5:40 PM ESTSpecial Weather StatementCTPAdams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and 1 more50 min

Nearby

Winter Storm Warnings in Pennsylvania, 2018Every winter storm warning in 2018

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.