Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 120, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Aug 1, 2020, 10:59 PM EDT for Franklin County, Pennsylvania. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 1, 2020, 10:59 PM EDT (02:59 UTC)
- Expired
- Aug 1, 2020, 11:30 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 Franklin County, PA
The radar
The Sterling radar (KLWX), 108 km from the middle of the area, began a volume at 02:58 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 00:00Z, 3.0 hours before the alert went out and 112 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
- 878 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1054 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 146 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.7
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS State College, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 1, 7:44 PM EDT, 3 hours 15 minutes earlier.
Area forecast discussion, Aug 1, 7:44 PM EDT, 3 hours 15 minutes before
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</html>Hazardous weather outlook, Aug 1, 3:43 PM EDT, 7 hours 16 minutes before
Hazardous Weather Outlook National Weather Service State College PA 343 PM EDT Sat Aug 1 2020 PAZ025-026-034>036-021945- Blair-Huntingdon-Bedford-Fulton-Franklin- 343 PM EDT Sat Aug 1 2020 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. Isolated strong thunderstorms with gusty winds and locally heavy rainfall are possible this afternoon and evening. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Isolated strong to severe thunderstorms with gusty winds and locally heavy rainfall are possible Sunday afternoon. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. PAZ004>006-010>012-017>019-027-045-021945- Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield- Northern Centre-Southern Centre-Mifflin-Southern Clinton- 343 PM EDT Sat Aug 1 2020 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. Locally heavy rainfall is possible this evening and tonight. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Isolated strong to severe thunderstorms with gusty winds and locally heavy rainfall are possible Sunday afternoon and evening. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. PAZ028-056-063>066-021945- Juniata-Perry-Cumberland-Adams-York-Lancaster- 343 PM EDT Sat Aug 1 2020 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Isolated strong to severe thunderstorms with gusty winds and locally heavy rainfall are possible Sunday afternoon and evening. Heavy rainfall impacts are possible late Monday and Tuesday as Hurricane Isaias tracks north along the Mid Atlantic coast. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. PAZ037-041-042-046-049>053-057>059-021945- Tioga-Northern Lycoming-Sullivan-Southern Lycoming-Union-Snyder- Montour-Northumberland-Columbia-Dauphin-Schuylkill-Lebanon- 343 PM EDT Sat Aug 1 2020 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Scattered severe thunderstorms with damaging winds 60 mph or greater are possible Sunday afternoon and evening. An isolated tornado is also possible. Heavy rainfall impacts are possible late Monday and Tuesday as Hurricane Isaias tracks north along the Mid Atlantic coast. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. PAZ024-033-021945- Cambria-Somerset- 343 PM EDT Sat Aug 1 2020 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. Isolated strong to severe thunderstorms with gusty winds and locally heavy rain are possible this afternoon into tonight. .DAYS TWO THROUGH SEVEN...Sunday through Friday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. MRS
In the hours before
Special weather statement, Aug 1, 10:00 PM EDT, 59 minutes before
Special Weather Statement National Weather Service State College PA 1000 PM EDT Sat Aug 1 2020 PAZ036-020215- Franklin PA- 1000 PM EDT Sat Aug 1 2020 ...A STRONG THUNDERSTORM WILL AFFECT PARTS OF FRANKLIN COUNTY UNTIL 1015 PM EDT... At 959 PM EDT, Doppler radar indicated a strong thunderstorm near Fountainhead-Orchard Hills, moving northeast at 20 mph. Torrential downpours and wind gusts 40 to 50 mph are possible. Locations impacted include... Waynesboro, Greencastle, Marion, Maugansville, State Line, Middleburg and Warrenton. LAT...LON 3972 7788 3973 7789 3986 7769 3972 7756 TIME...MOT...LOC 0159Z 232DEG 19KT 3971 7779 KF
Special weather statement, Aug 1, 10:54 PM EDT, 5 minutes before
Special Weather Statement
National Weather Service State College PA
1054 PM EDT Sat Aug 1 2020
PAZ036-020330-
Franklin PA-
1054 PM EDT Sat Aug 1 2020
...A STRONG THUNDERSTORM WILL AFFECT PARTS OF FRANKLIN COUNTY UNTIL
1130 PM EDT...
At 1053 PM EDT, Doppler radar indicated a strong thunderstorm near
Mont Alto, moving northeast at 20 mph.
Wind gusts up to 55 mph and pea size hail are possible. Torrential
rainfall is also occurring with this storm, and may lead to
localized flooding.
Locations impacted include...
Waynesboro, Greencastle, Fayetteville, Mont Alto, Quincy and Penn
State Mont Alto.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is occurring with this storm, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3981 7776 3994 7751 3981 7746 3979 7746
3973 7771
TIME...MOT...LOC 0253Z 231DEG 15KT 3982 7763
RXRThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 10:00 PM EDT | Special Weather Statement | CTP | Franklin | 15 min |
| Aug 1, 10:20 PM EDT | Areal Flood Advisory | CTP | Franklin | 55 min |
| Aug 1, 10:54 PM EDT | Special Weather Statement | CTP | Franklin | 36 min |
| Aug 1, 11:14 PM EDT | Special Weather Statement | CTP | Adams | 31 min |
| Aug 2, 12:58 AM EDT | Special Weather Statement | CTP | York | 62 min |
| Aug 2, 2:52 AM EDT | Areal Flood Advisory | CTP | Dauphin, Lancaster, Lebanon, York | 3 hr |
| Aug 2, 3:05 AM EDT | Special Weather Statement | CTP | Berks | 10 min |
| Aug 2, 3:43 AM EDT | Special Weather Statement | CTP | Lancaster | 62 min |
| Aug 2, 5:11 AM EDT | Special Weather Statement | CTP | Lebanon | 34 min |
| Aug 2, 7:24 AM EDT | Special Weather Statement | CTP | Schuylkill | 66 min |
| Aug 2, 3:59 PM EDT | Flash Flood Watch | CTP | Adams, Cumberland, Dauphin, Franklin, Fulton, Lancaster and 4 more | 47 hr |
| Aug 2, 5:15 PM EDT | Special Weather Statement | CTP | Schuylkill | 30 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2020Every severe thunderstorm warning in 2020
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.