Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 273, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Sep 15, 2021, 1:44 PM EDT for Centre County, Pennsylvania. It was in force for 31 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
- Sep 15, 2021, 1:44 PM EDT (17:44 UTC)
- Expired
- Sep 15, 2021, 2:15 PM EDT
- In force
- 31 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Centre County, PA
The radar
The State College radar (KCCX), 33 km from the middle of the area, began a volume at 17:47 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 |
|---|---|---|---|
| Sep 15, 1:57 PM EDT | TSTM WND DMG | 2 N State College, PA | MULTIPLE WIRES DOWN ON ORCHARD ROAD ON THE PSU CAMPUS. |
| Sep 15, 2:00 PM EDT | TSTM WND DMG | 1 Sw Bellefonte, PA | TREES AND WIRES DOWN. |
| Sep 15, 2:00 PM EDT | TSTM WND DMG | 1 Wsw Bellefonte, PA | TREES DOWN HILLARY RD. SPRING TWP. |
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 |
|---|---|---|---|
| Sep 15, 11:55 AM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 5.7 hours before the alert went out and 218 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
- 681 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 728 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.3
The text
As transmitted.
770
WUUS51 KCTP 151744
SVRCTP
PAC027-151815-
/O.NEW.KCTP.SV.W.0273.210915T1744Z-210915T1815Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
144 PM EDT Wed Sep 15 2021
The National Weather Service in State College PA has issued a
* Severe Thunderstorm Warning for...
Central Centre County in central Pennsylvania...
* Until 215 PM EDT.
* At 144 PM EDT, a severe thunderstorm was located near Houserville,
moving east at 30 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, Bellefonte, Pleasant Gap, Lamar, Lemont, Zion,
Houserville, Centre Hall, Milesburg, Millheim, Spring Mills,
Coburn, Madisonburg, Bald Eagle State Park, Howard, Unionville,
Pennsylvania State University and University Park Airport.
For those driving on Interstate 80, this includes areas between the
Snow Shoe and Lamar exits, specifically from mile markers 157 to 170.
This includes Interstate 99 from mile markers 73 to 85.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4105 7758 4098 7752 4097 7752 4096 7750
4084 7744 4080 7787 4091 7791
TIME...MOT...LOC 1744Z 251DEG 27KT 4087 7782
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
EvanegoThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 11:48 AM EDT | Special Weather Statement | CTP | Warren | 42 min |
| Sep 15, 1:11 PM EDT | Special Weather Statement | CTP | Sullivan | 49 min |
| Sep 15, 1:27 PM EDT | Special Weather Statement | CTP | Centre | 33 min |
| Sep 15, 1:48 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 42 min |
| Sep 15, 2:14 PM EDT | Areal Flood Advisory | CTP | Lycoming, Sullivan | 2 hr |
| Sep 15, 2:14 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton | 31 min |
| Sep 15, 2:36 PM EDT | Flash Flood Warning | CTP | Lycoming, Sullivan | 66 min |
| Sep 15, 2:45 PM EDT | Special Weather Statement | CTP | Union | 30 min |
| Sep 15, 2:46 PM EDT | Special Weather Statement | CTP | Sullivan | 44 min |
| Sep 15, 2:54 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming, Northumberland, Union | 36 min |
| Sep 15, 3:13 PM EDT | Special Weather Statement | CTP | Union | 17 min |
| Sep 15, 3:20 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin | 40 min |
| Sep 15, 3:24 PM EDT | Severe Thunderstorm Warning | CTP | Montour, Northumberland, Union | 36 min |
| Sep 15, 3:30 PM EDT | Special Weather Statement | CTP | Huntingdon | 30 min |
| Sep 15, 3:55 PM EDT | Special Weather Statement | CTP | Snyder | 35 min |
| Sep 15, 3:59 PM EDT | Special Weather Statement | CTP | Columbia, Montour | 31 min |
| Sep 15, 4:03 PM EDT | Areal Flood Advisory | CTP | Lycoming, Sullivan | 2 hr |
| Sep 15, 4:12 PM EDT | Flash Flood Warning | CTP | Columbia, Lycoming, Sullivan | 3 hr |
| Sep 15, 4:18 PM EDT | Severe Thunderstorm Warning | CTP | Columbia | 27 min |
| Sep 15, 4:27 PM EDT | Special Weather Statement | CTP | Perry | 33 min |
| Sep 15, 4:36 PM EDT | Special Weather Statement | CTP | Columbia, Northumberland | 24 min |
| Sep 15, 4:43 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin, Perry | 32 min |
| Sep 15, 4:46 PM EDT | Areal Flood Advisory | CTP | Montour, Northumberland | 89 min |
| Sep 15, 4:58 PM EDT | Special Weather Statement | CTP | Northumberland | 32 min |
| Sep 15, 4:59 PM EDT | Special Weather Statement | CTP | Perry | 31 min |
| Sep 15, 5:15 PM EDT | Special Weather Statement | CTP | Perry | 30 min |
| Sep 15, 5:19 PM EDT | Special Weather Statement | CTP | Franklin | 26 min |
| Sep 15, 5:32 PM EDT | Special Weather Statement | CTP | Dauphin | 28 min |
| Sep 15, 5:37 PM EDT | Special Weather Statement | CTP | Schuylkill | 23 min |
| Sep 15, 5:54 PM EDT | Special Weather Statement | CTP | Lebanon | 36 min |
| Sep 15, 6:16 PM EDT | Special Weather Statement | CTP | York | 29 min |
| Sep 15, 6:17 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon, Schuylkill | 43 min |
| Sep 15, 6:24 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Franklin | 27 min |
| Sep 15, 6:41 PM EDT | Special Weather Statement | CTP | Dauphin | 34 min |
| Sep 15, 6:54 PM EDT | Special Weather Statement | CTP | Berks | 21 min |
| Sep 15, 7:09 PM EDT | Areal Flood Advisory | CTP | Dauphin, York | 96 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.