Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 277, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Sep 15, 2021, 3:20 PM EDT for Juniata County, Mifflin County, Pennsylvania. It was in force for 40 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
- Sep 15, 2021, 3:20 PM EDT (19:20 UTC)
- Expired
- Sep 15, 2021, 4:00 PM EDT
- In force
- 40 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Juniata County, PA, Mifflin County, PA
The radar
The State College radar (KCCX), 52 km from the middle of the area, began a volume at 19:23 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, 3:50 PM EDT | TSTM WND DMG | 3 Sse Reeds Gap State P, PA | TREES DOWN IN THE VICINITY OF DECATUR. |
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
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.3 hours before the alert went out and 194 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
- 13 J/kg
- Mixed-layer CIN
- -270 J/kg
- Mixed-layer LCL
- 1457 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
246
WUUS51 KCTP 151920
SVRCTP
PAC067-087-152000-
/O.NEW.KCTP.SV.W.0277.210915T1920Z-210915T2000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
320 PM EDT Wed Sep 15 2021
The National Weather Service in State College PA has issued a
* Severe Thunderstorm Warning for...
Northeastern Mifflin County in central Pennsylvania...
North central Juniata County in central Pennsylvania...
* Until 400 PM EDT.
* At 320 PM EDT, a severe thunderstorm was located over Yeagertown,
moving east at 20 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...
Lewistown, Burnham, Milroy, Highland Park, Yeagertown,
Mcalisterville, Reedsville, Alfarata, Belltown, Reeds Gap State
Park, Maitland, Barrville, Wagner and Siglerville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4066 7770 4083 7736 4082 7735 4070 7735
4069 7730 4063 7728 4059 7767
TIME...MOT...LOC 1920Z 249DEG 16KT 4065 7759
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Banghoff1 follow-up statement
511
WWUS51 KCTP 151950
SVSCTP
Severe Weather Statement
National Weather Service State College PA
350 PM EDT Wed Sep 15 2021
PAC067-087-152000-
/O.EXP.KCTP.SV.W.0277.000000T0000Z-210915T2000Z/
Mifflin PA-Juniata PA-
350 PM EDT Wed Sep 15 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MIFFLIN AND NORTH
CENTRAL JUNIATA COUNTIES WILL EXPIRE AT 400 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However heavy rain
is still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
central Pennsylvania.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
State College PA.
LAT...LON 4066 7770 4083 7736 4082 7735 4070 7735
4069 7730 4063 7728 4059 7767
TIME...MOT...LOC 1950Z 249DEG 16KT 4070 7744
$$
BanghoffThe 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, 1:44 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 31 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, 3:24 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.