Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 257, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Aug 26, 2021, 4:41 PM EDT for Adams County, Pennsylvania. It was in force for 34 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
- Aug 26, 2021, 4:41 PM EDT (20:41 UTC)
- Expired
- Aug 26, 2021, 5:15 PM EDT
- In force
- 34 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Adams County, PA
The radar
The Sterling radar (KLWX), 109 km from the middle of the area, began a volume at 20:44 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 12:00Z, 8.7 hours before the alert went out and 111 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
- 809 J/kg
- Mixed-layer CIN
- -126 J/kg
- Mixed-layer LCL
- 1088 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
948
WUUS51 KCTP 262041
SVRCTP
PAC001-262115-
/O.NEW.KCTP.SV.W.0257.210826T2041Z-210826T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
441 PM EDT Thu Aug 26 2021
The National Weather Service in State College PA has issued a
* Severe Thunderstorm Warning for...
Northwestern Adams County in south central Pennsylvania...
* Until 515 PM EDT.
* At 440 PM EDT, a severe thunderstorm was located north of
Cashtown, and is nearly stationary.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Cashtown, Biglerville, Arendtsville and McKnightstown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3995 7747 3999 7740 4002 7729 4001 7728
3986 7723 3986 7746
TIME...MOT...LOC 2040Z 356DEG 3KT 3996 7740
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Travis1 follow-up statement
475
WWUS51 KCTP 262108
SVSCTP
Severe Weather Statement
National Weather Service State College PA
508 PM EDT Thu Aug 26 2021
PAC001-262118-
/O.EXP.KCTP.SV.W.0257.000000T0000Z-210826T2115Z/
Adams PA-
508 PM EDT Thu Aug 26 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ADAMS COUNTY WILL
EXPIRE AT 515 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However heavy rain
is still possible with this thunderstorm.
LAT...LON 3995 7747 3999 7740 4002 7729 4001 7728
3986 7723 3986 7746
TIME...MOT...LOC 2108Z 356DEG 3KT 3994 7740
$$
TravisThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 9:47 PM EDT | Special Weather Statement | CTP | Fulton | 43 min |
| Aug 26, 2:33 PM EDT | Special Weather Statement | CTP | Sullivan | 42 min |
| Aug 26, 3:02 PM EDT | Special Weather Statement | CTP | Lycoming | 43 min |
| Aug 26, 3:53 PM EDT | Special Weather Statement | CTP | Lycoming | 37 min |
| Aug 26, 4:10 PM EDT | Special Weather Statement | CTP | Lycoming | 35 min |
| Aug 26, 4:33 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 42 min |
| Aug 26, 5:34 PM EDT | Special Weather Statement | CTP | Somerset | 26 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.