Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 87, NWS State College, PA

July 7, 2021Warren County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jul 7, 2021, 6:29 PM EDT for Warren County, Pennsylvania. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 7, 2021, 6:29 PM EDT (22:29 UTC)
Expired
Jul 7, 2021, 7:30 PM EDT
In force
61 min
Issued by
NWS State College, PA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Warren County, PA

The radar

The Buffalo radar (KBUF), 133 km from the middle of the area, began a volume at 22:30 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 7, 3:31 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 10.5 hours before the alert went out and 132 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, Buffalo Intl Airport, NY at 12:00Z on 2021-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 161 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, Buffalo Intl Airport, NY at 12:00Z on 2021-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 square meters per square second.193958Sfc1 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
161 J/kg
Mixed-layer CIN
-85 J/kg
Mixed-layer LCL
734 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted.

395 
WUUS51 KCTP 072229
SVRCTP
PAC123-072330-
/O.NEW.KCTP.SV.W.0087.210707T2229Z-210707T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
629 PM EDT Wed Jul 7 2021

The National Weather Service in State College PA has issued a

* Severe Thunderstorm Warning for...
  Warren County in north central Pennsylvania...

* Until 730 PM EDT.

* At 629 PM EDT, severe thunderstorms were located along a line
  extending from Grand Valley to 10 miles southwest of Sheffield,
  moving northeast at 35 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Warren, Sheffield, Youngsville, Russell, Spring Creek, Scandia,
  Lottsville, Grand Valley, Warren South, Garland, Kinzua Dam,
  Chapman State Park, Ludlow, Tidioute, Sugar Grove, Starbrick and
  Clarendon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4181 7961 4200 7947 4200 7892 4183 7892
      4183 7895 4173 7895 4162 7909 4163 7961
TIME...MOT...LOC 2229Z 214DEG 30KT 4173 7955 4162 7919 

HAIL...1.00IN
WIND...60MPH
 
$$

Banghoff
2 follow-up statements
083 
WWUS51 KCTP 072303
SVSCTP

Severe Weather Statement
National Weather Service State College PA
703 PM EDT Wed Jul 7 2021

PAC123-072330-
/O.CON.KCTP.SV.W.0087.000000T0000Z-210707T2330Z/
Warren PA-
703 PM EDT Wed Jul 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR NORTHEASTERN WARREN COUNTY...

At 703 PM EDT, severe thunderstorms were located along a line
extending from 7 miles northeast of Lottsville to near Kinzua Dam,
moving northeast at 35 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Warren, Sheffield, Russell, Scandia, Warren South, Kinzua Dam,
Ludlow, Sugar Grove, Starbrick and Clarendon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4168 7901 4198 7949 4200 7947 4200 7892
      4183 7892 4183 7895 4173 7895
TIME...MOT...LOC 2303Z 219DEG 31KT 4198 7930 4179 7899 

HAIL...1.00IN
WIND...60MPH
 
$$

Banghoff
041 
WWUS51 KCTP 072325
SVSCTP

Severe Weather Statement
National Weather Service State College PA
725 PM EDT Wed Jul 7 2021

PAC123-072335-
/O.EXP.KCTP.SV.W.0087.000000T0000Z-210707T2330Z/
Warren PA-
725 PM EDT Wed Jul 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WARREN COUNTY
WILL EXPIRE AT 730 PM EDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.  However heavy rain is still possible with 
these thunderstorms. A Flood Advisory is in effect until 915PM for 
northern Warren County.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
north central Pennsylvania.

LAT...LON 4168 7901 4198 7949 4200 7947 4200 7892
      4183 7892 4183 7895 4173 7895
TIME...MOT...LOC 2325Z 214DEG 30KT 4213 7917 4194 7886 

$$

Banghoff

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 3:35 PM EDTSpecial Weather StatementCTPFulton40 min
Jul 7, 4:00 PM EDTSpecial Weather StatementCTPWarren45 min
Jul 7, 4:05 PM EDTSpecial Weather StatementCTPSomerset25 min
Jul 7, 4:12 PM EDTSpecial Weather StatementCTPSomerset33 min
Jul 7, 4:12 PM EDTSevere Thunderstorm WarningCTPCambria, Somerset47 min
Jul 7, 4:22 PM EDTSevere Thunderstorm WarningCTPBedford, Somerset38 min
Jul 7, 4:44 PM EDTSevere Thunderstorm WarningCTPCambria61 min
Jul 7, 4:46 PM EDTSpecial Weather StatementCTPWarren29 min
Jul 7, 4:48 PM EDTSpecial Weather StatementCTPBedford27 min
Jul 7, 4:54 PM EDTSevere Thunderstorm WarningCTPBedford, Somerset51 min
Jul 7, 4:59 PM EDTSpecial Weather StatementCTPWarren31 min
Jul 7, 5:07 PM EDTSevere Thunderstorm WarningCTPMcKean, Warren53 min
Jul 7, 5:12 PM EDTSpecial Weather StatementCTPBlair33 min
Jul 7, 5:19 PM EDTSevere Thunderstorm WarningCTPBlair41 min
Jul 7, 5:23 PM EDTSevere Thunderstorm WarningCTPBedford37 min
Jul 7, 5:27 PM EDTSpecial Weather StatementCTPClearfield33 min
Jul 7, 5:35 PM EDTSevere Thunderstorm WarningCTPBlair25 min
Jul 7, 5:38 PM EDTSpecial Weather StatementCTPWarren37 min
Jul 7, 5:42 PM EDTSpecial Weather StatementCTPCumberland33 min
Jul 7, 5:48 PM EDTSevere Thunderstorm WarningCTPBlair, Huntingdon57 min
Jul 7, 5:50 PM EDTSevere Thunderstorm WarningCTPCumberland, Franklin40 min
Jul 7, 5:55 PM EDTSevere Thunderstorm WarningCTPMcKean65 min
Jul 7, 6:00 PM EDTSpecial Weather StatementCTPElk30 min
Jul 7, 6:12 PM EDTSevere Thunderstorm WarningCTPCentre, Clearfield, Huntingdon48 min
Jul 7, 6:22 PM EDTSpecial Weather StatementCTPMifflin23 min
Jul 7, 6:36 PM EDTSevere Thunderstorm WarningCTPCentre, Clearfield, Clinton, Mifflin39 min
Jul 7, 6:37 PM EDTSevere Thunderstorm WarningCTPCumberland, Franklin, Perry37 min
Jul 7, 6:43 PM EDTSevere Thunderstorm WarningCTPMcKean, Potter77 min
Jul 7, 6:56 PM EDTSevere Thunderstorm WarningCTPCentre, Clinton, Mifflin, Snyder, Union49 min
Jul 7, 7:09 PM EDTSevere Thunderstorm WarningCTPJuniata, Mifflin, Snyder36 min
Jul 7, 7:19 PM EDTAreal Flood AdvisoryCTPWarren116 min
Jul 7, 7:31 PM EDTSevere Thunderstorm WarningCTPClinton, Lycoming, Montour, Northumberland, Union44 min
Jul 7, 7:44 PM EDTAreal Flood AdvisoryCTPMcKean, Potter2 hr
Jul 7, 7:48 PM EDTSpecial Weather StatementCTPBedford27 min
Jul 7, 7:50 PM EDTSpecial Weather StatementCTPTioga10 min
Jul 7, 7:51 PM EDTSpecial Weather StatementCTPPotter24 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2021Every severe thunderstorm warning 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.