Alert archive / Pennsylvania / Flash Flood Warnings in 2026
Flash Flood Warning 90, NWS State College, PA
NWS State College, PA issued this flash flood warning at Sep 3, 2026, 2:56 AM EDT for McKean County, Warren County, Pennsylvania. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 3, 2026, 2:56 AM EDT (06:56 UTC)
- Expired
- Sep 3, 2026, 6:00 AM EDT
- In force
- 3 hr
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Flood severity
- None
Counties McKean County, PA, Warren County, PA
The radar
The State College radar (KCCX), 115 km from the middle of the area, began a volume at 06:56 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 00:00Z, 6.9 hours before the alert went out and 182 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
- 2581 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 1375 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 7.5
The text
As transmitted.
326
WGUS51 KCTP 030656
FFWCTP
PAC083-123-031000-
/O.NEW.KCTP.FF.W.0090.260903T0656Z-260903T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service State College PA
256 AM EDT Thu Sep 3 2026
The National Weather Service in State College has issued a
* Flash Flood Warning for...
McKean County in north central Pennsylvania...
Warren County in north central Pennsylvania...
* Until 600 AM EDT.
* At 256 AM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. Additional rainfall amounts up to 1.5 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Warren, Bradford, Kane, Sheffield, Columbus, Youngsville,
Smethport, Wetmore, Russell, Betula, James City, Spring Creek, Rew,
Kinzua Dam, Ludlow, Scandia, Warren South, Chapman State Park,
Westline and Marshburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4162 7896 4163 7925 4162 7961 4200 7961
4200 7891 4199 7892 4200 7851 4182 7840
4162 7833 4162 7848 4163 7848 4163 7864
4162 7868
FLASH FLOOD...RADAR INDICATED
$$
ColbertWhat forecasters said that day
The local office's own words before this flash flood 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 flash flood warning went out at Sep 2, 8:27 PM EDT, 6 hours 29 minutes earlier. Its key messages:
- 1) Late summer surge of heat and humidity continues severe thunderstorm and excessive rainfall threat through Thursday
Area forecast discussion, Sep 2, 8:27 PM EDT, 6 hours 29 minutes before
Area Forecast Discussion National Weather Service State College PA 827 PM EDT Wed Sep 2 2026 .WHAT HAS CHANGED... * No significant changes, severe weather risk continues this evening && .KEY MESSAGES... 1) Late summer surge of heat and humidity continues severe thunderstorm and excessive rainfall threat through Thursday && .DISCUSSION... KEY MESSAGE 1: Late summer surge of heat and humidity continues severe thunderstorm and excessive rainfall threat through Thursday A series of mid level impulses tracking eastward along the northern periphery of an expansive 500mb ridge will continue to interact with anomalous moisture/instability and strong WNW flow aloft to promote severe storm and excessive rain risk through Thursday. After a round of severe storms this morning, robust destabilization is occurring across western and central PA with plenty of heating and very rich dewpoints in the 70-75F range. More thunderstorms are expected this afternoon through the evening in an convective environment highly supportive of organized storms capable of all severe weather hazards. There is also the potential for heavy rain and flash flooding especially were storms repeat over the same area. Increased southwest to westerly flow on Thursday will push the will continue to pump in the late summer heat and very high dewpoints. Heat advisory remains in effect from 11a-8p Thursday across a portion of south central PA where max heat index values are projected to reach/exceed 100F. The severe risk will be focused more across the southwest quadrant of central PA Thursday, and south of the PA-MD border on Friday. An upper trough passage favors one final round of showers and storms on Friday, but fortunately the Labor Day weekend is trending dry. The upper ridge is forecast to retrograde by the end of the week which allows for a return to more seasonal temperatures and lower humidity this weekend into early next week. && .AVIATION /00Z THURSDAY THROUGH MONDAY/... With scattered storms taking shape over Central PA, have included mentions of thunderstorms over northern and western terminals this evening. Exact timing of when exactly any of this scattered activity could impact a site remains uncertain, but any impacts to terminals could see lightning and IFR visibility drops in heavy rain. Another round of forcing has kicked up storms in New York which is dropping southward. Most guidances continues this line southward into our area overnight with further development along its western flanks. Have included PROB30s for most confident timing of activity overnight, IFR restrictions in heavy downpours are possible. Fog remains possible but guidance has backed off prevailing fog conditions at JST and AOO so adjusted visibilities there. Visibility restrictions remain possible though in any thunderstorms that cross paths with the terminals. Prevailing IFR ceilings look most likely in the eastern terminals starting around tomorrow. Morning thunderstorm activity may lead to these restrictions persisting at MDT and LNS later into the morning. Afternoon thunderstorm activity looks most likely at JST and AOO tomorrow but seeing how these storms tonight unfold may change timing/other sites that may see impacts. Outlook... Thu...Scattered-Numerous SHRA/TSRA with brief restrictions possible; morning fog. Fri...Scattered SHRA/TSRA SW. VFR elsewhere after morning fog. Sat-Mon...VFR favored; morning fog possible. && .CTP WATCHES/WARNINGS/ADVISORIES... Heat Advisory from 11 AM to 8 PM EDT Thursday for PAZ026>028- 035-036-056-057-059-063>066. && WHAT HAS CHANGED...Steinbugl KEY MESSAGES...Steinbugl DISCUSSION...Steinbugl AVIATION...Lambrech
Hazardous weather outlook, Sep 3, 2:08 AM EDT, 48 minutes before
Hazardous Weather Outlook National Weather Service State College PA 208 AM EDT Thu Sep 3 2026 PAZ026>028-035-036-056-057-059-063>066-040615- Huntingdon-Mifflin-Juniata-Fulton-Franklin-Perry-Dauphin-Lebanon- Cumberland-Adams-York-Lancaster- 208 AM EDT Thu Sep 3 2026 ...HEAT ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 8 PM EDT THIS EVENING... This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...Tonight. A few strong to severe thunderstorms with damaging winds and heavy rainfall are possible into early Thursday morning. Locally very heavy rain from training thunderstorms could produce localized flash Flooding of small streams, creeks and low lying areas. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Please listen to NOAA Weather Radio or go to weather.gov/StateCollege on the internet for more information about the following hazards. Heat Advisory. Strong to severe thunderstorms with damaging winds and heavy rainfall are possible again this Thursday afternoon and evening. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. PAZ004>006-010>012-017>019-037-041-042-045-046-040615- Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield- Northern Centre-Southern Centre-Tioga-Northern Lycoming-Sullivan- Southern Clinton-Southern Lycoming- 208 AM EDT Thu Sep 3 2026 ...SEVERE THUNDERSTORM WATCH 646 IN EFFECT UNTIL 2 AM EDT EARLY THIS MORNING... This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...Tonight. Please listen to NOAA Weather Radio or go to weather.gov/StateCollege on the internet for more information about the following hazards. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Strong to severe thunderstorms with damaging winds and heavy rainfall are possible again this Thursday afternoon and evening. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather. PAZ024-025-033-034-049>053-058-040615- Cambria-Blair-Somerset-Bedford-Union-Snyder-Montour-Northumberland- Columbia-Schuylkill- 208 AM EDT Thu Sep 3 2026 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...Tonight. Strong to severe thunderstorms with damaging winds and heavy rainfall are possible into the predawn hour of Thursday. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Strong to severe thunderstorms with damaging winds and heavy rainfall are possible again this Thursday afternoon and evening. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather.
In the hours before
Local storm report, Sep 3, 2:02 AM EDT, 54 minutes before
Preliminary Local Storm Report
National Weather Service State College PA
202 AM EDT Thu Sep 3 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1227 AM Flash Flood Jersey Shore 41.20N 77.26W
09/03/2026 Lycoming PA 911 Call Center
400-600 Block of Alleghany Street flooded
and impassable.
&&
JBLLocal storm report, Sep 3, 2:09 AM EDT, 47 minutes before
Preliminary Local Storm Report
National Weather Service State College PA
209 AM EDT Thu Sep 3 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1206 AM Tstm Wnd Dmg 2 W Pine Grove 40.55N 76.42W
09/03/2026 Schuylkill PA 911 Call Center
Tree down on the 200 block of Oak Grove Road
in Pine Grove Township.
&&
JBLLocal storm report, Sep 3, 2:17 AM EDT, 39 minutes before
Preliminary Local Storm Report
National Weather Service State College PA
217 AM EDT Thu Sep 3 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1143 PM Tstm Wnd Dmg 1 ESE Liverpool 40.57N 76.97W
09/02/2026 Dauphin PA 911 Call Center
Tree down on Tarry Hall Road.
&&
JBLLocal storm report, Sep 3, 2:32 AM EDT, 24 minutes before
Preliminary Local Storm Report
National Weather Service State College PA
232 AM EDT Thu Sep 3 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0100 AM Tstm Wnd Dmg 2 WNW Mill Hall 41.11N 77.53W
09/03/2026 Clinton PA 911 Call Center
Wires down on Laurel Run road in Bald Eagle
Township.
&&
JBLLocal storm report, Sep 3, 2:42 AM EDT, 14 minutes before
Preliminary Local Storm Report
National Weather Service State College PA
242 AM EDT Thu Sep 3 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0215 AM Flash Flood 3 E Port Matilda 40.80N 78.00W
09/03/2026 Centre PA NWS Employee
NWS Employee reported flooding on State
route 550 in multiple locations in and
around Stormstown.
&&
JBLLocal storm report, Sep 3, 2:53 AM EDT, 3 minutes before
Preliminary Local Storm Report
National Weather Service State College PA
253 AM EDT Thu Sep 3 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0104 AM Tstm Wnd Dmg 3 WNW Lamar 41.03N 77.56W
09/03/2026 Clinton PA 911 Call Center
Tree down in Porter Township by I-80 EB.
&&
JBLThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 2, 8:12 PM EDT | Tornado Warning | CTP | Centre, Clinton | 33 min |
| Sep 2, 8:22 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming, Potter, Tioga | 38 min |
| Sep 2, 8:29 PM EDT | Tornado Warning | CTP | Tioga | 35 min |
| Sep 2, 8:39 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming | 51 min |
| Sep 2, 8:44 PM EDT | Tornado Warning | CTP | Centre, Clinton | 31 min |
| Sep 2, 8:50 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Potter, Tioga | 55 min |
| Sep 2, 8:58 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming, Potter | 47 min |
| Sep 2, 9:03 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming | 57 min |
| Sep 2, 9:24 PM EDT | Flash Flood Warning | CTP | Centre, Clinton, Lycoming | 3 hr |
| Sep 2, 9:29 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 16 min |
| Sep 2, 9:50 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Lycoming, Union | 40 min |
| Sep 2, 9:50 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Sullivan, Tioga | 40 min |
| Sep 2, 10:12 PM EDT | Flash Flood Warning | CTP | Centre, Clinton, Lycoming, Union | 3 hr |
| Sep 2, 10:35 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 40 min |
| Sep 2, 10:51 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Northumberland, Snyder, Union | 39 min |
| Sep 2, 11:08 PM EDT | Special Weather Statement | CTP | Clinton | 37 min |
| Sep 2, 11:09 PM EDT | Severe Thunderstorm Warning | CTP | Elk, McKean, Warren | 66 min |
| Sep 2, 11:13 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Juniata, Mifflin, Northumberland, Perry, Snyder | 47 min |
| Sep 2, 11:15 PM EDT | Tornado Warning | CTP | Elk, McKean, Warren | 15 min |
| Sep 2, 11:26 PM EDT | Flash Flood Warning | CTP | Northumberland, Snyder, Union | 4 hr |
| Sep 2, 11:26 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon, Northumberland, Schuylkill, Snyder, Union | 49 min |
| Sep 2, 11:40 PM EDT | River Flood Warning | CTP | Centre, Clinton | 16 hr |
| Sep 2, 11:43 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clearfield, Clinton, Elk, Lycoming, McKean and 2 more | 41 min |
| Sep 3, 12:03 AM EDT | Flash Flood Warning | CTP | Dauphin, Lebanon, Schuylkill | 4 hr |
| Sep 3, 12:10 AM EDT | Special Weather Statement | CTP | Dauphin, Lancaster, Lebanon, Schuylkill | 50 min |
| Sep 3, 12:23 AM EDT | Severe Thunderstorm Warning | CTP | Cameron, Centre, Clearfield, Clinton, Elk, Lycoming and 3 more | 61 min |
| Sep 3, 12:27 AM EDT | Areal Flood Warning | CTP | Centre, Clinton, Lycoming | 6 hr |
| Sep 3, 12:28 AM EDT | Special Weather Statement | CTP | McKean, Warren | 47 min |
| Sep 3, 12:50 AM EDT | Special Weather Statement | CTP | Lancaster, York | 70 min |
| Sep 3, 1:09 AM EDT | Flash Flood Warning | CTP | Clinton, Lycoming | 4 hr |
| Sep 3, 1:11 AM EDT | Special Weather Statement | CTP | Cameron, Elk, McKean | 49 min |
| Sep 3, 1:14 AM EDT | Areal Flood Warning | CTP | Centre, Clinton, Lycoming, Union | 6 hr |
| Sep 3, 1:26 AM EDT | River Flood Warning | CTP | Snyder, Union | 15 hr |
| Sep 3, 1:32 AM EDT | Severe Thunderstorm Warning | CTP | Centre, Huntingdon | 43 min |
| Sep 3, 2:12 AM EDT | Flash Flood Warning | CTP | Centre, Clearfield, Huntingdon, Juniata, Mifflin, Perry | 4 hr |
| Sep 3, 2:42 AM EDT | Flood Watch | CTP | Adams, Bedford, Blair, Cambria, Cameron, Centre and 27 more | 20 hr |
| Sep 3, 3:23 AM EDT | Areal Flood Warning | CTP | Northumberland, Snyder, Union | 3 hr |
| Sep 3, 3:53 AM EDT | Areal Flood Warning | CTP | Dauphin, Lebanon, Schuylkill | 3 hr |
| Sep 3, 4:11 AM EDT | Flash Flood Warning | CTP | Dauphin, Lancaster, Lebanon | 4 hr |
| Sep 3, 5:03 AM EDT | Areal Flood Warning | CTP | Clinton, Lycoming | 117 min |
| Sep 3, 5:46 AM EDT | Areal Flood Warning | CTP | Centre, Clearfield, Huntingdon, Juniata, Mifflin, Perry | 2 hr |
| Sep 3, 5:56 AM EDT | Areal Flood Warning | CTP | McKean, Warren | 3 hr |
| Sep 3, 6:15 AM EDT | Special Weather Statement | CTP | Warren | 45 min |
| Sep 3, 6:55 AM EDT | Special Weather Statement | CTP | Cameron, Clearfield, Elk | 65 min |
| Sep 3, 8:37 AM EDT | Special Weather Statement | CTP | Somerset | 23 min |
| Sep 3, 8:55 AM EDT | Severe Thunderstorm Warning | CTP | Bedford, Somerset | 50 min |
| Sep 3, 9:34 AM EDT | Severe Thunderstorm Warning | CTP | Bedford, Franklin, Fulton, Somerset | 41 min |
| Sep 3, 7:01 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 44 min |
| Sep 3, 7:20 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 25 min |
| Sep 3, 7:21 PM EDT | Flash Flood Warning | CTP | Cambria, Somerset | 3 hr |
| Sep 3, 7:39 PM EDT | Tornado Warning | CTP | Bedford, Cambria, Somerset | 36 min |
| Sep 3, 7:42 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Cambria, Fulton, Huntingdon, Somerset | 48 min |
| Sep 3, 7:54 PM EDT | Tornado Warning | CTP | Bedford, Blair, Cambria | 36 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2026Every flash flood warning in 2026
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.