Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 197, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Aug 11, 2021, 3:28 PM EDT for Centre County, Huntingdon County, Mifflin County, Pennsylvania. It was in force for 62 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 11, 2021, 3:28 PM EDT (19:28 UTC)
- Expired
- Aug 11, 2021, 4:30 PM EDT
- In force
- 62 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Centre County, PA, Huntingdon County, PA, Mifflin County, PA
The radar
The State College radar (KCCX), 35 km from the middle of the area, began a volume at 19:29 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 11, 3:55 PM EDT | TSTM WND DMG | 3 Se Centre Hall, PA | TREE ON WIRES. |
| Aug 11, 4:02 PM EDT | TSTM WND DMG | Milroy, PA | TREES ACROSS ROAD. |
| Aug 11, 4:05 PM EDT | TSTM WND DMG | 1 S Burnham, PA | MULTIPLE TREES DOWN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 11, 3:02 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.5 hours before the alert went out and 201 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.
- Mixed-layer CAPE
- 553 J/kg
- Mixed-layer CIN
- -190 J/kg
- Mixed-layer LCL
- 1301 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
900
WUUS51 KCTP 111928
SVRCTP
PAC027-061-087-112030-
/O.NEW.KCTP.SV.W.0197.210811T1928Z-210811T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
328 PM EDT Wed Aug 11 2021
The National Weather Service in State College PA has issued a
* Severe Thunderstorm Warning for...
Northeastern Huntingdon County in central Pennsylvania...
Northeastern Mifflin County in central Pennsylvania...
Southeastern Centre County in central Pennsylvania...
* Until 430 PM EDT.
* At 328 PM EDT, severe thunderstorms were located along a line
extending from Julian to near Stormstown, moving east at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
State College, Park Forest Village, Boalsburg, Pleasant Gap,
Stormstown, Lemont, Burnham, Houserville, Pine Grove Mills, Milroy,
Highland Park, Centre Hall, Yeagertown, Ramblewood, Reedsville,
Port Matilda, Spring Mills, Coburn, Julian and Alfarata.
This includes Interstate 99 from mile markers 60 to 79.
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 4069 7794 4073 7808 4089 7806 4086 7735
4085 7736 4070 7735 4067 7736 4061 7750
TIME...MOT...LOC 1928Z 281DEG 27KT 4087 7797 4075 7800
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Banghoff3 follow-up statements
468
WWUS51 KCTP 111939
SVSCTP
Severe Weather Statement
National Weather Service State College PA
339 PM EDT Wed Aug 11 2021
PAC027-061-087-112030-
/O.CON.KCTP.SV.W.0197.000000T0000Z-210811T2030Z/
Huntingdon PA-Mifflin PA-Centre PA-
339 PM EDT Wed Aug 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR NORTHEASTERN HUNTINGDON...NORTHEASTERN MIFFLIN AND SOUTHEASTERN
CENTRE COUNTIES...
At 339 PM EDT, severe thunderstorms were located along a line
extending from Houserville to Pine Grove Mills, moving east at 25
mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
State College, Park Forest Village, Boalsburg, Pleasant Gap, Lemont,
Burnham, Houserville, Pine Grove Mills, Milroy, Highland Park, Centre
Hall, Yeagertown, Ramblewood, Reedsville, Spring Mills, Coburn,
Julian, Alfarata, Whipple Dam State Park and Reeds Gap State Park.
This includes Interstate 99 from mile markers 68 to 80.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 4070 7798 4089 7795 4086 7735 4085 7736
4070 7735 4067 7736 4061 7750 4069 7794
TIME...MOT...LOC 1939Z 279DEG 21KT 4084 7784 4072 7787
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Banghoff507
WWUS51 KCTP 111951
SVSCTP
Severe Weather Statement
National Weather Service State College PA
351 PM EDT Wed Aug 11 2021
PAC027-061-087-112030-
/O.CON.KCTP.SV.W.0197.000000T0000Z-210811T2030Z/
Huntingdon PA-Mifflin PA-Centre PA-
351 PM EDT Wed Aug 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR NORTHEASTERN HUNTINGDON...NORTHEASTERN MIFFLIN AND SOUTHEASTERN
CENTRE COUNTIES...
At 351 PM EDT, severe thunderstorms were located along a line
extending from near Pleasant Gap to near Whipple Dam State Park,
moving east at 30 mph.
HAZARD...70 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Boalsburg, Pleasant Gap, Lemont, Burnham, Milroy, Highland Park,
Centre Hall, Yeagertown, Reedsville, Spring Mills, Coburn, Alfarata,
Potters Mills, Belltown, Seven Mountains, Poe Valley State Park,
Reeds Gap State Park, Maitland, Barrville and Wagner.
This includes Interstate 99 from mile markers 78 to 79.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
State College PA.
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 4067 7785 4088 7779 4086 7735 4085 7736
4070 7735 4067 7736 4061 7750
TIME...MOT...LOC 1951Z 281DEG 27KT 4083 7774 4071 7777
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
Banghoff523
WWUS51 KCTP 112027
SVSCTP
Severe Weather Statement
National Weather Service State College PA
427 PM EDT Wed Aug 11 2021
PAC027-061-087-112036-
/O.EXP.KCTP.SV.W.0197.000000T0000Z-210811T2030Z/
Huntingdon PA-Mifflin PA-Centre PA-
427 PM EDT Wed Aug 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN HUNTINGDON...
NORTHEASTERN MIFFLIN AND SOUTHEASTERN CENTRE COUNTIES WILL EXPIRE AT
430 PM EDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
central Pennsylvania.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
State College PA.
Remember, a Severe Thunderstorm Warning still remains in effect for
eastern Centre County until 545 PM.
LAT...LON 4067 7785 4088 7779 4086 7735 4085 7736
4070 7735 4067 7736 4061 7750
TIME...MOT...LOC 2026Z 281DEG 27KT 4078 7742 4066 7745
$$
BanghoffThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 12:18 AM EDT | Special Weather Statement | CTP | Union | 27 min |
| Aug 11, 3:38 AM EDT | Excessive Heat Warning | CTP | Adams, Columbia, Cumberland, Dauphin, Franklin, Juniata and 10 more | 39 hr |
| Aug 11, 5:03 AM EDT | Special Weather Statement | CTP | Warren | 27 min |
| Aug 11, 6:40 AM EDT | Special Weather Statement | CTP | McKean | 50 min |
| Aug 11, 2:11 PM EDT | Special Weather Statement | CTP | Cambria | 49 min |
| Aug 11, 2:32 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster, Lebanon, York | 58 min |
| Aug 11, 2:59 PM EDT | Special Weather Statement | CTP | Somerset | 61 min |
| Aug 11, 3:02 PM EDT | Special Weather Statement | CTP | Blair | 28 min |
| Aug 11, 3:13 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Huntingdon | 46 min |
| Aug 11, 3:34 PM EDT | Severe Thunderstorm Warning | CTP | Mifflin | 41 min |
| Aug 11, 3:35 PM EDT | Special Weather Statement | CTP | Huntingdon | 25 min |
| Aug 11, 3:49 PM EDT | Special Weather Statement | CTP | Juniata | 26 min |
| Aug 11, 3:55 PM EDT | Special Weather Statement | CTP | Dauphin | 35 min |
| Aug 11, 4:07 PM EDT | Special Weather Statement | CTP | York | 38 min |
| Aug 11, 4:08 PM EDT | Special Weather Statement | CTP | Franklin | 37 min |
| Aug 11, 4:13 PM EDT | Special Weather Statement | CTP | Juniata, Perry, Snyder, Union | 32 min |
| Aug 11, 4:23 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Snyder, Union | 59 min |
| Aug 11, 4:37 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 53 min |
| Aug 11, 4:42 PM EDT | Special Weather Statement | CTP | York | 33 min |
| Aug 11, 4:43 PM EDT | Special Weather Statement | CTP | Cumberland | 32 min |
| Aug 11, 4:47 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Juniata, Northumberland, Perry, Snyder | 53 min |
| Aug 11, 4:52 PM EDT | Areal Flood Advisory | CTP | Dauphin | 2 hr |
| Aug 11, 4:54 PM EDT | Special Weather Statement | CTP | Lebanon | 36 min |
| Aug 11, 5:00 PM EDT | Flash Flood Warning | CTP | Cumberland, Dauphin, York | 85 min |
| Aug 11, 5:00 PM EDT | Special Weather Statement | CTP | York | 30 min |
| Aug 11, 5:08 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland | 52 min |
| Aug 11, 5:14 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 46 min |
| Aug 11, 5:35 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Northumberland | 48 min |
| Aug 11, 5:44 PM EDT | Areal Flood Advisory | CTP | Lancaster, Lebanon | 2 hr |
| Aug 11, 5:47 PM EDT | Special Weather Statement | CTP | Lancaster, York | 58 min |
| Aug 11, 5:54 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 51 min |
| Aug 11, 5:58 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 47 min |
| Aug 11, 6:25 PM EDT | Areal Flood Advisory | CTP | Cumberland, Dauphin, York | 95 min |
| Aug 11, 7:14 PM EDT | Special Weather Statement | CTP | Warren | 31 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.