Alert archive / Pennsylvania / High Wind Watches in 2021

High Wind Watch 2, NWS State College, PA

April 29, 202110 counties in Pennsylvania

NWS State College, PA issued this high wind watch at Apr 29, 2021, 3:58 AM EDT for 10 counties in Pennsylvania. It took effect at Apr 30, 2021, 12:00 PM EDT. It was in force for .

The area

The counties it named.

The facts

Issued
Apr 29, 2021, 3:58 AM EDT (07:58 UTC)
In effect from
Apr 30, 2021, 12:00 PM EDT
Expired
Apr 29, 2021, 8:21 PM EDT
In force
Issued by
NWS State College, PA

Counties Adams County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Fulton County, PA, Lancaster County, PA, Lebanon County, PA, Perry County, PA, Schuylkill County, PA, York County, PA

The radar

The State College radar (KCCX), 119 km from the middle of the area, began a volume at 08:01 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 8.0 hours before the alert went out and 140 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 2021-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 328 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 2021-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 square meters per square second.19395878Sfc1 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
328 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
2022 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
106 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

As transmitted.

200 
WWUS71 KCTP 290758
NPWCTP

URGENT - WEATHER MESSAGE
National Weather Service State College PA
358 AM EDT Thu Apr 29 2021

PAZ035-036-056>059-063>066-300000-
/O.NEW.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
358 AM EDT Thu Apr 29 2021

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

* WHAT...Northwest winds 20 to 30 mph with gusts up to 50 to 60 
  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.

&&

$$

MRS/REG 

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.
2 follow-up statements
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
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

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, 2:33 PM EDTFreeze WatchCTPCambria, Centre, Clearfield, Somerset, Warren24 hr

Nearby

High Wind Watches in Pennsylvania, 2021Every high wind 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.