Alert archive / Pennsylvania / Freeze Watches in 2021

Freeze Watch 3, NWS State College, PA

April 29, 20215 counties in Pennsylvania

NWS State College, PA issued this freeze watch at Apr 29, 2021, 2:33 PM EDT for 5 counties in Pennsylvania. It took effect at May 1, 2021, 12:00 AM EDT. It was in force for .

The area

The counties it named.

The facts

Issued
Apr 29, 2021, 2:33 PM EDT (18:33 UTC)
In effect from
May 1, 2021, 12:00 AM EDT
Expired
Apr 30, 2021, 2:26 PM EDT
In force
Issued by
NWS State College, PA

Counties Cambria County, PA, Centre County, PA, Clearfield County, PA, Somerset County, PA, Warren County, PA

The radar

The State College radar (KCCX), 56 km from the middle of the area, began a volume at 18:35 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.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 6.6 hours before the alert went out and 130 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, Pittsburgh, PA at 12:00Z on 2021-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 51 joules per kilogram.LCLEL10008507005003002001001 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, Pittsburgh, PA at 12:00Z on 2021-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 square meters per square second.1939587897117Sfc1 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
51 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
579 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
179 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted.

568 
WWUS71 KCTP 291833
NPWCTP

URGENT - WEATHER MESSAGE
National Weather Service State College PA
233 PM EDT Thu Apr 29 2021

PAZ004-300645-
/O.NEW.KCTP.FZ.A.0003.210501T0400Z-210501T1200Z/
Warren-
Including the city of Warren
233 PM EDT Thu Apr 29 2021

...FREEZE WATCH IN EFFECT FROM LATE FRIDAY NIGHT THROUGH SATURDAY
MORNING...

* WHAT...Sub-freezing temperatures possible.

* WHERE...Warren County.

* WHEN...From late Friday night through Saturday morning.

* IMPACTS...Freezing temperatures could kill crops and other
  sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take protective measures now as freezing temperatures could
damage or kill tender plants and vegetation. Potted plants should
be brought inside.

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.

&&

$$

PAZ035-036-056>059-063>066-300645-
/O.CON.KCTP.HW.A.0002.210430T1600Z-210501T0900Z/
Fulton-Franklin-Perry-Dauphin-Schuylkill-Lebanon-Cumberland-Adams-
York-Lancaster-
Including the cities of McConnellsburg, Chambersburg, Newport, 
Harrisburg, Hershey, Pottsville, Lebanon, Carlisle, Gettysburg, 
York, and Lancaster
233 PM EDT Thu Apr 29 2021

...HIGH WIND WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON
THROUGH LATE FRIDAY NIGHT...

* WHAT...Northwest winds 20 to 30 mph with gusts over 50 mph 
  possible.

* WHERE...Fulton, Franklin, Perry, Dauphin, Schuylkill, Lebanon, 
  Cumberland, Adams, York and Lancaster Counties.

* WHEN...From Friday afternoon through late Friday night.

* IMPACTS...Damaging winds could blow down trees and power lines.
  Widespread power outages are possible. Travel could be
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts and warnings for updates on this
situation. Fasten loose objects or shelter objects in a safe
location prior to the onset of winds.

For high wind safety and preparedness information, visit
weather.gov/safety/wind.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/ctp
4 follow-up statements
149 
WWUS71 KCTP 300021
NPWCTP

URGENT - WEATHER MESSAGE
National Weather Service State College PA
821 PM EDT Thu Apr 29 2021

PAZ035-036-056>059-063>066-301230-
/O.UPG.KCTP.HW.A.0002.210430T1600Z-210501T0900Z/
/O.NEW.KCTP.HW.W.0002.210430T1800Z-210501T0600Z/
Fulton-Franklin-Perry-Dauphin-Schuylkill-Lebanon-Cumberland-Adams-
York-Lancaster-
Including the cities of McConnellsburg, Chambersburg, Newport, 
Harrisburg, Hershey, Pottsville, Lebanon, Carlisle, Gettysburg, 
York, and Lancaster
821 PM EDT Thu Apr 29 2021

...HIGH WIND WARNING IN EFFECT FROM 2 PM FRIDAY TO 2 AM EDT
SATURDAY...

* WHAT...Northwest winds 25 to 35 mph with gusts up to 60 mph 
  expected.

* WHERE...Fulton, Franklin, Perry, Dauphin, Schuylkill, Lebanon, 
  Cumberland, Adams, York and Lancaster Counties.

* WHEN...From 2 PM Friday to 2 AM EDT Saturday. The strongest
  winds are likely Friday evening.

* IMPACTS...Downed tree limbs onto power lines will likely result
  in scattered power outages. Travel will be difficult, 
  especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

For high wind safety information, visit weather.gov/wind.

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.

&&

$$

PAZ006-011-012-017>019-024>028-033-034-037-041-042-045-046-
049>053-301230-
/O.NEW.KCTP.WI.Y.0003.210430T1600Z-210501T0400Z/
Potter-Cameron-Northern Clinton-Clearfield-Northern Centre-
Southern Centre-Cambria-Blair-Huntingdon-Mifflin-Juniata-Somerset-
Bedford-Tioga-Northern Lycoming-Sullivan-Southern Clinton-
Southern Lycoming-Union-Snyder-Montour-Northumberland-Columbia-
Including the cities of Coudersport, Emporium, Renovo, DuBois, 
Clearfield, Philipsburg, State College, Johnstown, Altoona, 
Huntingdon, Mount Union, Lewistown, Mifflintown, Somerset, 
Bedford, Mansfield, Wellsboro, Trout Run, Laporte, Lock Haven, 
Williamsport, Lewisburg, Selinsgrove, Danville, Sunbury, 
Shamokin, Bloomsburg, and Berwick
821 PM EDT Thu Apr 29 2021

...WIND ADVISORY IN EFFECT FROM NOON FRIDAY TO MIDNIGHT EDT
FRIDAY NIGHT...

* WHAT...Northwest winds 20 to 25 mph with gusts around 50 mph 
  expected.

* WHERE...Portions of central Pennsylvania.

* WHEN...From noon Friday to midnight EDT Friday night.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

For high wind safety information, visit weather.gov/wind.

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.

&&

$$

PAZ004-301230-
/O.CON.KCTP.FZ.A.0003.210501T0400Z-210501T1200Z/
Warren-
Including the city of Warren
821 PM EDT Thu Apr 29 2021

...FREEZE WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGH
SATURDAY MORNING...

* WHAT...Sub-freezing temperatures possible.

* WHERE...Warren County.

* WHEN...Late Friday night through Saturday morning.

* IMPACTS...Freezing temperatures could kill crops and other 
  sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take protective measures now as freezing temperatures could
damage or kill tender plants and vegetation. Potted plants should
be brought inside.

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.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/ctp
264 
WWUS71 KCTP 300646
NPWCTP

URGENT - WEATHER MESSAGE
National Weather Service State College PA
246 AM EDT Fri Apr 30 2021

PAZ035-036-056>059-063>066-301900-
/O.CON.KCTP.HW.W.0002.210430T1800Z-210501T0600Z/
Fulton-Franklin-Perry-Dauphin-Schuylkill-Lebanon-Cumberland-Adams-
York-Lancaster-
Including the cities of McConnellsburg, Chambersburg, Newport, 
Harrisburg, Hershey, Pottsville, Lebanon, Carlisle, Gettysburg, 
York, and Lancaster
246 AM EDT Fri Apr 30 2021

...HIGH WIND WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON
TO 2 AM EDT SATURDAY...

* WHAT...Northwest winds 25 to 35 mph with gusts up to 60 mph 
  expected.

* WHERE...Fulton, Franklin, Perry, Dauphin, Schuylkill, Lebanon, 
  Cumberland, Adams, York and Lancaster Counties.

* WHEN...From 2 PM Friday to 2 AM EDT Saturday. The strongest 
  winds are likely Friday evening.

* IMPACTS...Downed tree limbs onto power lines will likely 
  result in scattered power outages. Travel will be difficult, 
  especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

For high wind safety information, visit weather.gov/wind.

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.

&&

$$

PAZ017-018-024-033-301900-
/O.EXA.KCTP.FZ.A.0003.210501T0400Z-210501T1200Z/
/O.CON.KCTP.WI.Y.0003.210430T1600Z-210501T0400Z/
Clearfield-Northern Centre-Cambria-Somerset-
Including the cities of DuBois, Clearfield, Philipsburg, 
Johnstown, and Somerset
246 AM EDT Fri Apr 30 2021

...WIND ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO MIDNIGHT
EDT TONIGHT...
...FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
MORNING...

* WHAT...For the Wind Advisory, northwest winds 20 to 25 mph with
  gusts up to 50 mph expected. For the Freeze Watch, sub-freezing
  temperatures as low as 30 possible.

* WHERE...Clearfield, Northern Centre, Cambria and Somerset 
  Counties.

* WHEN...For the Wind Advisory, this afternoon and evening. For
  the Freeze Watch, Saturday morning.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Freezing temperatures could kill crops and other 
  sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take protective measures now as freezing temperatures could 
damage or kill tender plants and vegetation. Potted plants should 
be brought inside.

For high wind safety information, visit weather.gov/wind.

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.

&&

$$

PAZ006-011-012-019-025>028-034-037-041-042-045-046-049>053-301900-
/O.CON.KCTP.WI.Y.0003.210430T1600Z-210501T0400Z/
Potter-Cameron-Northern Clinton-Southern Centre-Blair-Huntingdon-
Mifflin-Juniata-Bedford-Tioga-Northern Lycoming-Sullivan-
Southern Clinton-Southern Lycoming-Union-Snyder-Montour-
Northumberland-Columbia-
Including the cities of Coudersport, Emporium, Renovo, 
State College, Altoona, Huntingdon, Mount Union, Lewistown, 
Mifflintown, Bedford, Mansfield, Wellsboro, Trout Run, Laporte, 
Lock Haven, Williamsport, Lewisburg, Selinsgrove, Danville, 
Sunbury, Shamokin, Bloomsburg, and Berwick
246 AM EDT Fri Apr 30 2021

...WIND ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO MIDNIGHT
EDT TONIGHT...

* WHAT...Northwest winds 20 to 25 mph with gusts around 50 mph 
  expected.

* WHERE...Much of central Pennsylvania.

* WHEN...From noon Friday to midnight EDT Friday night.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

For high wind safety information, visit weather.gov/wind.

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.

&&

$$

PAZ004-301900-
/O.CON.KCTP.FZ.A.0003.210501T0400Z-210501T1200Z/
Warren-
Including the city of Warren
246 AM EDT Fri Apr 30 2021

...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH
SATURDAY MORNING...

* WHAT...Sub-freezing temperatures possible.

* WHERE...Warren County.

* WHEN...Late Friday night through Saturday morning.

* IMPACTS...Freezing temperatures could kill crops and other 
  sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take protective measures now as freezing temperatures could
damage or kill tender plants and vegetation. Potted plants should
be brought inside.

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.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/ctp
383 
WWUS71 KCTP 301358
NPWCTP

URGENT - WEATHER MESSAGE
National Weather Service State College PA
958 AM EDT Fri Apr 30 2021

PAZ035-036-056>059-063>066-010200-
/O.CON.KCTP.HW.W.0002.210430T1800Z-210501T0600Z/
Fulton-Franklin-Perry-Dauphin-Schuylkill-Lebanon-Cumberland-Adams-
York-Lancaster-
Including the cities of McConnellsburg, Chambersburg, Newport, 
Harrisburg, Hershey, Pottsville, Lebanon, Carlisle, Gettysburg, 
York, and Lancaster
958 AM EDT Fri Apr 30 2021

...HIGH WIND WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON
TO 2 AM EDT SATURDAY...

* WHAT...Northwest winds 25 to 35 mph, with gusts up to 60 mph 
  expected.

* WHERE...Fulton, Franklin, Perry, Dauphin, Schuylkill, Lebanon, 
  Cumberland, Adams, York, and Lancaster Counties.

* WHEN...From 2 PM Friday to 2 AM EDT Saturday. The strongest
  winds are likely later this afternoon into the evening.

* IMPACTS...Downed tree limbs onto power lines will likely 
  result in scattered power outages. Travel will be difficult, 
  especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

For high wind safety information, visit weather.gov/wind.

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.

&&

$$

PAZ017-018-024-033-010200-
/O.CON.KCTP.WI.Y.0003.210430T1600Z-210501T0400Z/
/O.CON.KCTP.FZ.A.0003.210501T0400Z-210501T1200Z/
Clearfield-Northern Centre-Cambria-Somerset-
Including the cities of DuBois, Clearfield, Philipsburg, 
Johnstown, and Somerset
958 AM EDT Fri Apr 30 2021

...WIND ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...
...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH
SATURDAY MORNING...

* WHAT...For the Wind Advisory, northwest winds 20 to 25 mph, 
  with gusts up to 50 mph expected. For the Freeze Watch, sub-
  freezing temperatures as low as 30 possible.

* WHERE...Clearfield, Northern Centre, Cambria, and Somerset 
  Counties.

* WHEN...For the Wind Advisory, this afternoon and evening. For 
  the Freeze Watch, Saturday morning.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Freezing temperatures could kill crops and other 
  sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Take protective measures now as freezing temperatures could
damage or kill tender plants and vegetation. Potted plants should
be brought inside.

For high wind safety information, visit weather.gov/wind.

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.

&&

$$

PAZ006-011-012-019-025>028-034-037-041-042-045-046-049>053-010200-
/O.CON.KCTP.WI.Y.0003.210430T1600Z-210501T0400Z/
Potter-Cameron-Northern Clinton-Southern Centre-Blair-Huntingdon-
Mifflin-Juniata-Bedford-Tioga-Northern Lycoming-Sullivan-
Southern Clinton-Southern Lycoming-Union-Snyder-Montour-
Northumberland-Columbia-
Including the cities of Coudersport, Emporium, Renovo, 
State College, Altoona, Huntingdon, Mount Union, Lewistown, 
Mifflintown, Bedford, Mansfield, Wellsboro, Trout Run, Laporte, 
Lock Haven, Williamsport, Lewisburg, Selinsgrove, Danville, 
Sunbury, Shamokin, Bloomsburg, and Berwick
958 AM EDT Fri Apr 30 2021

...WIND ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...

* WHAT...Northwest winds 20 to 25 mph, with gusts around 50 mph 
  expected.

* WHERE...Much of central Pennsylvania.

* WHEN...From noon Friday to midnight EDT Friday night.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

For high wind safety information, visit weather.gov/wind.

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.

&&

$$

PAZ004-010200-
/O.CON.KCTP.FZ.A.0003.210501T0400Z-210501T1200Z/
Warren-
Including the city of Warren
958 AM EDT Fri Apr 30 2021

...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH
SATURDAY MORNING...

* WHAT...Sub-freezing temperatures possible.

* WHERE...Warren County.

* WHEN...Late Friday night through Saturday morning.

* IMPACTS...Freezing temperatures could kill crops and other 
  sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take protective measures now as freezing temperatures could
damage or kill tender plants and vegetation. Potted plants should
be brought inside.

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.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/ctp
494 
WWUS71 KCTP 301826
NPWCTP

URGENT - WEATHER MESSAGE
National Weather Service State College PA
226 PM EDT Fri Apr 30 2021

PAZ017-018-024-033-010630-
/O.UPG.KCTP.FZ.A.0003.210501T0400Z-210501T1200Z/
/O.NEW.KCTP.FZ.W.0003.210501T0400Z-210501T1200Z/
/O.CON.KCTP.WI.Y.0003.000000T0000Z-210501T0400Z/
Clearfield-Northern Centre-Cambria-Somerset-
Including the cities of DuBois, Clearfield, Philipsburg, 
Johnstown, and Somerset
226 PM EDT Fri Apr 30 2021

...WIND ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...
...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM EDT
SATURDAY...

* WHAT...For the Freeze Warning, sub-freezing temperatures as 
  low as 32 expected. For the Wind Advisory, northwest winds 15 
  to 25 mph, with gusts up to 50 mph.

* WHERE...Clearfield, Northern Centre, Cambria and Somerset 
  Counties.

* WHEN...For the Freeze Warning, from midnight tonight to 8 AM 
  EDT Saturday. For the Wind Advisory, until midnight EDT 
  tonight.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result. Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

For high wind safety information, visit weather.gov/wind.

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.

Take protective measures now as freezing temperatures could
damage or kill tender plants and vegetation. Potted plants should
be brought inside.

&&

$$

PAZ004-010630-
/O.UPG.KCTP.FZ.A.0003.210501T0400Z-210501T1200Z/
/O.NEW.KCTP.FZ.W.0003.210501T0400Z-210501T1200Z/
Warren-
Including the city of Warren
226 PM EDT Fri Apr 30 2021

...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM EDT
SATURDAY...

* WHAT...Sub-freezing temperatures as low as 30 expected.

* WHERE...Warren County.

* WHEN...From midnight tonight to 8 AM EDT Saturday.

* IMPACTS...Frost and freeze conditions will kill crops, other 
  sensitive vegetation and possibly damage unprotected outdoor 
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take protective measures now as freezing temperatures could
damage or kill tender plants and vegetation. Potted plants should
be brought inside.

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.

&&

$$

PAZ035-036-056>059-063>066-010600-
/O.CON.KCTP.HW.W.0002.000000T0000Z-210501T0600Z/
Fulton-Franklin-Perry-Dauphin-Schuylkill-Lebanon-Cumberland-Adams-
York-Lancaster-
Including the cities of McConnellsburg, Chambersburg, Newport, 
Harrisburg, Hershey, Pottsville, Lebanon, Carlisle, Gettysburg, 
York, and Lancaster
226 PM EDT Fri Apr 30 2021

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 2 AM EDT SATURDAY...

* WHAT...Northwest winds 25 to 35 mph, with gusts up to 60 mph 
  expected.

* WHERE...Fulton, Franklin, Perry, Dauphin, Schuylkill, Lebanon, 
  Cumberland, Adams, York, and Lancaster Counties.

* WHEN...From 2 PM Friday to 2 AM EDT Saturday. The strongest 
  winds are likely later this afternoon into the evening.

* IMPACTS...Downed tree limbs onto power lines will likely 
  result in scattered power outages. Travel will be difficult, 
  especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

For high wind safety information, visit weather.gov/wind.

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.

&&

$$

PAZ006-011-012-019-025>028-034-037-041-042-045-046-049>053-010400-
/O.CON.KCTP.WI.Y.0003.000000T0000Z-210501T0400Z/
Potter-Cameron-Northern Clinton-Southern Centre-Blair-Huntingdon-
Mifflin-Juniata-Bedford-Tioga-Northern Lycoming-Sullivan-
Southern Clinton-Southern Lycoming-Union-Snyder-Montour-
Northumberland-Columbia-
Including the cities of Coudersport, Emporium, Renovo, 
State College, Altoona, Huntingdon, Mount Union, Lewistown, 
Mifflintown, Bedford, Mansfield, Wellsboro, Trout Run, Laporte, 
Lock Haven, Williamsport, Lewisburg, Selinsgrove, Danville, 
Sunbury, Shamokin, Bloomsburg, and Berwick
226 PM EDT Fri Apr 30 2021

...WIND ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...

* WHAT...Northwest winds 20 to 25 mph, with gusts around 50 mph 
  expected.

* WHERE...Much of central Pennsylvania.

* WHEN...From noon Friday to midnight EDT Friday night.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

For high wind safety information, visit weather.gov/wind.

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.

&&

$$

What forecasters said that day

The local office's own words before this freeze watch 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 freeze watch went out at Apr 29, 2:20 PM EDT, 13 minutes earlier.

Area forecast discussion, Apr 29, 2:20 PM EDT, 13 minutes before
Area Forecast Discussion
National Weather Service State College PA
220 PM EDT Thu Apr 29 2021

.SYNOPSIS...
Widespread showers are expected today with isolated thunderstorms
possible this afternoon. Showers gradually fade tonight with
noticeably cooler and very windy conditions developing on
Friday. Expect a chilly start to May before conditions improve
and temperatures trend warmer into next week.

&&

.NEAR TERM /THROUGH TONIGHT/...
Showers covering nearly all of central PA late morning as sfc
wave deepens and slides along the front draped across
NW/Ncentral PA. Categorical POPs continue to be supported
throughout most of central PA. However, the steadiest rain
should fall across the extreme northwest part of the forecast
area, where fgen forcing is strongest at nose of low level jet.
Elsewhere, the rain should be showery in nature. Latest HREF and
WPC/NBM blend supports total rainfall of around 1 inch across
the northern tier.

Earlier SLGT outlook downgraded to MRGL given marginal
instability <200 J/kg, despite strong post frontal bulk shear.
A few strong gusts may occur this aftn/eve, but should remain
below severe limits given lack of instability.

A cold front will traverse the area tonight with showers fading
into early Friday morning downwind of the Alleghenies in the
cooler and increasingly gusty postfrontal NW flow. 24hrMinTChange
will be a -10F to -20F degrees with lows ranging from low/mid
40s in the western and northern Alleghenies to mid 50s in the
LSV.

&&

.SHORT TERM /FRIDAY THROUGH FRIDAY NIGHT/...
Latest model guidance shows intensifying low pressure into New
England on Friday. A tightening p-gradient and reinforcing
surge of low level CAA will translate into a period of strong
gusty NW winds to close out the month. Forecast soundings show
very deep BL mixing which will tap into 40-50+kt winds aloft.
We remain keen to trend wind gusts higher than blended model
guidance with peak gusts currently in the 50-55 mph range. With
the potential for higher gusts up to 60 mph, we issued a high
wind watch for parts of south central PA in collaboration with
WFOs LWX and PHI. We are very bullish on advisory level gusts
across most of CPA.

Friday is the last day of April 2021 and it will be noticeably
colder with a passing shower in spots. The MaxT24hrChange will
be a setback of 10 to 20 degrees [trending] colder with highs a
-5 to -15 degrees below average from the mid 40s NW to low 60s
 SE.

A rather chilly Friday night with lows Saturday morning in the
low 30s/40s to kick off the 5th month of the year. As 7
additional zones start the growing season May 1, we're closely
monitoring freeze potential Saturday morning in Warren County &
in the Laurel Highlands. Confidence in freezing temperatures in
Warren County continues to increase, while we'll closely monitor
trends in Somerset, Cambria, Clearfield, and possibly Northern
Centre County.

&&

.LONG TERM /SATURDAY THROUGH THURSDAY/...
High confidence in cool and dry conditions Saturday, as upper
trough lifts out and surface high builds into PA. Any lingering
gustiness in the morning will taper off by afternoon. Dry air
at low levels will likely translate to afternoon minRH values
below 30%, although a subsidence inversion should prevent the
mixing down of even drier air above the BL. All medium range
guidance develops an upper ridge off of the east coast Sunday
into early next week, with a quasi- stationary front draped
across the Grt Lks into northern New England. A deep southwest
flow should result in a return to above normal temperatures
during this period, along with an increasing chance of showers,
especially closer to the front over northwest PA.

ECENS and GEFS plumes continue to indicate the best chance of
showers will come in two bouts during the first half of next
week. The first is likely Monday PM in association with a
southern stream shortwave lifting out of the Miss Valley. The
progged surface low track through the eastern Grt Lks favors
northwest Pa for the most significant rain from this system. The
second bout is likely to come mid week associated with next
wave of low pressure riding along quasi- stationary front. A bit
more uncertainty remains with this one as the ECENS deepens the
surface low more significantly, resulting in a slower/southern
track compared to the GEFS. Regardless of which track wins out,
a cooler & unsettled weekend appears likely for the second
weekend in May.

&&

.AVIATION /19Z THURSDAY THROUGH TUESDAY/...
Widespread rain showers are ongoing across most of the area at
the lunch hour, with a mixed bag of restrictions ranging from
LIFR/IFR at BFD, JST, and IPT, MVFR at UNV, and VFR at AOO,
MDT, and LNS. Expect rain showers and mostly steady-state cigs
to continue into the late afternoon hours.

A narrow cold frontal rain band will move from northwest to
southeast this evening, and may result in briefly reduced
visibilities and gusty winds as the line moves through. Recent
guidance is less impressive with this line, indicate it may fall
apart as it traverses Central Pennsylvania. In its wake, expect
winds to rapidly shift to come out of the west, northwest with
gusts of 20-30kts continuing through the overnight hours.
IFR/LIFR cigs will persist in the northwest mountains at JST and
BFD, with MVFR or VFR prevailing farther east/south.

Outlook...

Fri...Restrictions possible with rain showers. Gusty W/NW winds.

Sat...MVFR cigs BFD/JST possible in morning. Breezy.

Sun...Improving conditions.

Mon...Mainly VFR conditions, but a chance of showers late NW.

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
High Wind Watch from Friday afternoon through late Friday
night for PAZ035-036-056>059-063>066.

&&

SYNOPSIS...DeVoir/Steinbugl
NEAR TERM...DeVoir/Steinbugl
SHORT TERM...Steinbugl
LONG TERM...Fitzgerald/Banghoff
AVIATION...Banghoff/Gutierrez
Hazardous weather outlook, Apr 29, 4:07 AM EDT, 10 hours 26 minutes before
Hazardous Weather Outlook
National Weather Service State College PA
407 AM EDT Thu Apr 29 2021

PAZ004-300815-
Warren-
407 AM EDT Thu Apr 29 2021

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Wind gusts over 40 mph are possible Friday afternoon into Friday
night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ012-017>019-024>028-033-034-041-042-045-046-049>053-300815-
Northern Clinton-Clearfield-Northern Centre-Southern Centre-Cambria-
Blair-Huntingdon-Mifflin-Juniata-Somerset-Bedford-Northern Lycoming-
Sullivan-Southern Clinton-Southern Lycoming-Union-Snyder-Montour-
Northumberland-Columbia-
407 AM EDT Thu Apr 29 2021

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Isolated severe thunderstorms with localized damaging wind gusts are
possible this afternoon.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Wind gusts up to 50 mph are possible Friday afternoon into Friday
night.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ035-036-056>059-063>066-300815-
Fulton-Franklin-Perry-Dauphin-Schuylkill-Lebanon-Cumberland-Adams-
York-Lancaster-
407 AM EDT Thu Apr 29 2021

...HIGH WIND WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH LATE
FRIDAY NIGHT...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Isolated severe thunderstorms with localized damaging wind gusts are
possible this afternoon.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

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

   High Wind Watch.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ005-006-010-011-037-300815-
McKean-Potter-Elk-Cameron-Tioga-
407 AM EDT Thu Apr 29 2021

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Isolated strong thunderstorms with gusty winds are possible this
afternoon.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Wind gusts up to 50 mph are possible Friday afternoon into Friday
night.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

MRS

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 28, 9:57 PM EDTSpecial Weather StatementCTPClearfield33 min
Apr 29, 3:58 AM EDTHigh Wind WatchCTPAdams, Cumberland, Dauphin, Franklin, Fulton, Lancaster and 4 more16 hr

Nearby

Freeze Watches in Pennsylvania, 2021Every freeze watch in 2021

Sources

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