Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 134, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Jul 12, 2021, 4:42 PM EDT for 4 counties in Pennsylvania. It was in force for 63 min. 1 report 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
- Jul 12, 2021, 4:42 PM EDT (20:42 UTC)
- Expired
- Jul 12, 2021, 5:45 PM EDT
- In force
- 63 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Dauphin County, PA, Lancaster County, PA, Lebanon County, PA, York County, PA
The radar
The Sterling radar (KLWX), 141 km from the middle of the area, began a volume at 20:41 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 |
|---|---|---|---|
| Jul 12, 5:19 PM EDT | TSTM WND DMG | 1 Wnw Paradise, PA | TREE ON WIRES ON PEQUEA MANOR ROAD. |
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 |
|---|---|---|---|
| Jul 12, 3:34 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 8.7 hours before the alert went out and 139 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
- 974 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 724 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.8
The text
As transmitted.
012
WUUS51 KCTP 122042
SVRCTP
PAC043-071-075-133-122145-
/O.NEW.KCTP.SV.W.0134.210712T2042Z-210712T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
442 PM EDT Mon Jul 12 2021
The National Weather Service in State College PA has issued a
* Severe Thunderstorm Warning for...
Lancaster County in south central Pennsylvania...
Central York County in south central Pennsylvania...
Southeastern Dauphin County in south central Pennsylvania...
Southwestern Lebanon County in south central Pennsylvania...
* Until 545 PM EDT.
* At 442 PM EDT, severe thunderstorms were located along a line
extending from Hershey to Royalton to near Mount Wolf to Dover,
moving southeast at 25 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Elizabethtown, Palmyra, Bainbridge, Mount Wolf, Manchester and
Campbelltown around 450 PM EDT.
York, Annville, West York, North York, Rheems, Lawn and Emigsville
around 500 PM EDT.
Mount Joy, Spry, Cornwall, Valley View, Tyler Run-Queens Gate,
East York, Wrightsville, Marietta, Grantley and
Stonybrook-Wilshire around 510 PM EDT.
Red Lion, Columbia, Dallastown, Salunga-Landisville, Yoe and
Yorkana around 520 PM EDT.
Other locations impacted by these severe thunderstorms include York
Haven, Buck, Three Mile Island, East Prospect, Mount Gretna,
Rawlinsville, Schoeneck, Loganville, New Salem and Goldsboro.
This includes the following Interstates...
The Pennsylvania Turnpike from mile markers 249 to 286.
Interstate 81 from mile markers 76 to 77.
Interstate 83 from mile markers 9 to 32.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3998 7700 4000 7701 4012 7682 4020 7677
4037 7674 4023 7608 3998 7612 3990 7617
3973 7645
TIME...MOT...LOC 2042Z 293DEG 21KT 4028 7668 4018 7670 4010 7674 4002
7688
HAIL...0.75IN
WIND...60MPH
$$
JurewiczThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 8:03 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Columbia, Lycoming, Montour, Northumberland, Snyder and 1 more | 42 min |
| Jul 11, 8:43 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Montour, Northumberland, Sullivan | 62 min |
| Jul 11, 8:44 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Lebanon, Perry, Schuylkill | 76 min |
| Jul 11, 8:52 PM EDT | Tornado Warning | CTP | Dauphin | 23 min |
| Jul 11, 9:07 PM EDT | Areal Flood Advisory | CTP | Columbia, Lycoming, Montour, Northumberland, Sullivan, Union | 2 hr |
| Jul 11, 9:08 PM EDT | Special Weather Statement | CTP | Franklin | 37 min |
| Jul 11, 9:32 PM EDT | Special Weather Statement | CTP | Fulton | 28 min |
| Jul 11, 9:32 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Lebanon, York | 58 min |
| Jul 11, 9:52 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 53 min |
| Jul 11, 10:06 PM EDT | Flash Flood Warning | CTP | Cumberland, Dauphin, Lebanon, York | 118 min |
| Jul 11, 10:35 PM EDT | Special Weather Statement | CTP | Lebanon, York | 70 min |
| Jul 12, 12:04 AM EDT | Areal Flood Advisory | CTP | Cumberland, Dauphin, Lebanon, York | 116 min |
| Jul 12, 1:21 PM EDT | Flash Flood Watch | CTP | Columbia, Cumberland, Dauphin, Juniata, Lebanon, Lycoming and 12 more | 13 hr |
| Jul 12, 2:15 PM EDT | Special Weather Statement | CTP | Lancaster | 60 min |
| Jul 12, 2:34 PM EDT | Special Weather Statement | CTP | Mifflin | 26 min |
| Jul 12, 2:36 PM EDT | Special Weather Statement | CTP | Perry | 24 min |
| Jul 12, 2:45 PM EDT | Special Weather Statement | CTP | Adams, Franklin | 60 min |
| Jul 12, 2:49 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Perry | 41 min |
| Jul 12, 2:59 PM EDT | Special Weather Statement | CTP | Mifflin | 31 min |
| Jul 12, 3:17 PM EDT | Special Weather Statement | CTP | Lebanon | 43 min |
| Jul 12, 3:30 PM EDT | Special Weather Statement | CTP | Juniata | 45 min |
| Jul 12, 3:31 PM EDT | Areal Flood Advisory | CTP | Lancaster | 119 min |
| Jul 12, 3:55 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Perry | 35 min |
| Jul 12, 3:56 PM EDT | Flash Flood Warning | CTP | Lancaster | 2 hr |
| Jul 12, 3:57 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 63 min |
| Jul 12, 3:59 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, York | 46 min |
| Jul 12, 4:11 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Lancaster, Lebanon, York | 34 min |
| Jul 12, 4:57 PM EDT | Areal Flood Advisory | CTP | Lancaster | 2 hr |
| Jul 12, 5:29 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 61 min |
| Jul 12, 5:42 PM EDT | Areal Flood Advisory | CTP | Lancaster | 93 min |
| Jul 12, 6:31 PM EDT | Areal Flood Advisory | CTP | Lancaster | 119 min |
| Jul 12, 6:43 PM EDT | Areal Flood Advisory | CTP | Tioga | 92 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.