Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 258, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Aug 27, 2021, 5:16 PM EDT for Lancaster County, Pennsylvania. It was in force for 59 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 27, 2021, 5:16 PM EDT (21:16 UTC)
- Expired
- Aug 27, 2021, 6:15 PM EDT
- In force
- 59 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Lancaster County, PA
The radar
The Dover AFB radar (KDOX), 141 km from the middle of the area, began a volume at 21:19 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 27, 5:36 PM EDT | TSTM WND DMG | 2 Sse Willow Street, PA | TREE ON WIRES. |
| Aug 27, 5:40 PM EDT | TSTM WND DMG | 2 W Leola, PA | TREES ON WIRES. |
| Aug 27, 5:40 PM EDT | TSTM WND DMG | 3 Ese Lancaster, PA | TREE ON WIRES. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.3 hours before the alert went out and 161 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
- 780 J/kg
- Mixed-layer CIN
- -92 J/kg
- Mixed-layer LCL
- 983 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
082
WUUS51 KCTP 272116
SVRCTP
PAC071-272215-
/O.NEW.KCTP.SV.W.0258.210827T2116Z-210827T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
516 PM EDT Fri Aug 27 2021
The National Weather Service in State College PA has issued a
* Severe Thunderstorm Warning for...
East central Lancaster County in south central Pennsylvania...
* Until 615 PM EDT.
* At 516 PM EDT, a severe thunderstorm was located over Strasburg,
moving north at 10 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Lancaster, Willow Street, New Holland, Leola, Paradise, Strasburg,
Quarryville, Gap, Leacock, Bareville, Smithville, Lampeter,
Intercourse, Georgetown, Farmersville, Gordonville, Bird-In-Hand,
Smoketown, Refton and White Horse.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Very heavy rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3986 7608 3992 7630 4015 7623 4007 7593
4006 7594
TIME...MOT...LOC 2116Z 199DEG 9KT 3996 7617
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Colbert1 follow-up statement
959
WWUS51 KCTP 272208
SVSCTP
Severe Weather Statement
National Weather Service State College PA
608 PM EDT Fri Aug 27 2021
PAC071-272218-
/O.EXP.KCTP.SV.W.0258.000000T0000Z-210827T2215Z/
Lancaster PA-
608 PM EDT Fri Aug 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL LANCASTER COUNTY
WILL EXPIRE AT 615 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
State College PA.
LAT...LON 3986 7608 3992 7630 4015 7623 4007 7593
4006 7594
TIME...MOT...LOC 2208Z 199DEG 9KT 4008 7611
$$
ColbertThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 4:40 AM EDT | Flash Flood Watch | CTP | Dauphin, Lancaster, Lebanon, York | 17 hr |
| Aug 27, 2:13 PM EDT | Areal Flood Advisory | CTP | Potter | 2 hr |
| Aug 27, 3:10 PM EDT | Special Weather Statement | CTP | York | 35 min |
| Aug 27, 3:37 PM EDT | Special Weather Statement | CTP | Juniata | 38 min |
| Aug 27, 4:13 PM EDT | Special Weather Statement | CTP | Tioga | 32 min |
| Aug 27, 4:29 PM EDT | Areal Flood Advisory | CTP | Tioga | 2 hr |
| Aug 27, 4:34 PM EDT | Areal Flood Advisory | CTP | Columbia, Northumberland, Schuylkill | 2 hr |
| Aug 27, 4:50 PM EDT | Areal Flood Advisory | CTP | Lancaster, York | 115 min |
| Aug 27, 4:55 PM EDT | Flash Flood Warning | CTP | Tioga | 99 min |
| Aug 27, 5:02 PM EDT | Special Weather Statement | CTP | York | 28 min |
| Aug 27, 5:11 PM EDT | Special Weather Statement | CTP | Lancaster | 49 min |
| Aug 27, 5:13 PM EDT | Special Weather Statement | CTP | Dauphin | 47 min |
| Aug 27, 5:38 PM EDT | Areal Flood Advisory | CTP | Dauphin, Lebanon | 2 hr |
| Aug 27, 5:46 PM EDT | Areal Flood Advisory | CTP | Lancaster, Lebanon | 80 min |
| Aug 27, 5:57 PM EDT | Flash Flood Warning | CTP | Dauphin | 70 min |
| Aug 27, 6:05 PM EDT | Special Weather Statement | CTP | Lebanon | 25 min |
| Aug 27, 6:07 PM EDT | Flash Flood Warning | CTP | Lancaster | 60 min |
| Aug 27, 6:18 PM EDT | Areal Flood Advisory | CTP | Dauphin, Lebanon, Schuylkill | 2 hr |
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.