Alert archive / Pennsylvania / Flash Flood Warnings in 2026
Flash Flood Warning 94, NWS State College, PA
NWS State College, PA issued this flash flood warning at Sep 17, 2026, 9:16 PM EDT for Somerset County, Pennsylvania. It was in force for 3 hr. 2 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 17, 2026, 9:16 PM EDT (01:16 UTC)
- Expired
- Sep 17, 2026, 11:57 PM EDT
- In force
- 3 hr
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Flood severity
- None
County Somerset County, PA
The radar
The Pittsburgh radar (KPBZ), 112 km from the middle of the area, began a volume at 01:17 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 17, 9:20 PM EDT | FLASH FLOOD | 1 S Davidsville, PA | Flooded basement on South Main Street in Davidsville. Report of 18 inches of water in the basement. |
| Sep 17, 9:45 PM EDT | FLASH FLOOD | 3 W Jerome, PA | Flooding on Somerset Pike near Kaufman Road. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this flash flood warning; the first came 4 minutes after it went out.
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, 1.3 hours before the alert went out and 98 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
- 1027 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 717 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.9
The text
As transmitted.
907
WGUS51 KCTP 180116
FFWCTP
PAC111-180415-
/O.NEW.KCTP.FF.W.0094.260918T0116Z-260918T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service State College PA
916 PM EDT Thu Sep 17 2026
The National Weather Service in State College has issued a
* Flash Flood Warning for...
Northeastern Somerset County in south central Pennsylvania...
* Until 1215 AM EDT.
* At 916 PM 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 inch 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...
Windber, Boswell, Davidsville, Central City, Jerome, Tire Hill,
Ogletown, Jennerstown, Hooversville and Benson.
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.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4021 7911 4029 7906 4028 7893 4027 7889
4026 7890 4024 7888 4024 7866 4011 7872
4011 7892 4016 7915 4016 7914 4020 7913
FLASH FLOOD...RADAR INDICATED
$$
Bauco1 follow-up statement
052
WGUS71 KCTP 180357
FFSCTP
Flash Flood Statement
National Weather Service State College PA
1157 PM EDT Thu Sep 17 2026
PAC111-180407-
/O.CAN.KCTP.FF.W.0094.000000T0000Z-260918T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Somerset PA-
1157 PM EDT Thu Sep 17 2026
...FLASH FLOOD WARNING IS CANCELLED FOR NORTHEASTERN SOMERSET
COUNTY...
The heavy rain has ended. Flash flooding is no longer expected to
pose a threat. Please continue to heed any remaining road closures.
&&
LAT...LON 4028 7893 4027 7890 4027 7889 4026 7890
4024 7888 4024 7866 4011 7872 4011 7892
4016 7915 4016 7914 4018 7914 4018 7913
4020 7913 4021 7911 4029 7906
$$
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 17, 7:23 PM EDT, 1 hour 53 minutes earlier. Its key messages:
- 1) Very humid with locally heavy rainfall possible this afternoon 2) Cooler this weekend with rain returning by Sunday
Area forecast discussion, Sep 17, 7:23 PM EDT, 1 hour 53 minutes before
Area Forecast Discussion National Weather Service State College PA 723 PM EDT Thu Sep 17 2026 .WHAT HAS CHANGED... * Added higher fog probabilities in for early Friday morning * Adjusted pops for scattered afternoon rain && .KEY MESSAGES... 1) Very humid with locally heavy rainfall possible this afternoon 2) Cooler this weekend with rain returning by Sunday && .DISCUSSION... KEY MESSAGE 1: Very humid with locally heavy rainfall possible this afternoon Morning rounds of rain have slid off to the southeast with only isolated showers in the northern tier of counties across our CWA. Afternoon coverage of showers and thunderstorms remains uncertain, but with additional convection beginning to develop to our west over Pittsburg's area we can expect at least a few heavy downpours later this afternoon before the stratiform rain shield over Ohio arrives later tonight. By midnight the cold front should be south of the PA/MD border, and with some scattering of clouds anticipated and light winds leading into Friday morning fog development seems probable over areas that saw rain today. Previous Discussion... Highly anomalous moisture for this time of year (NAEFS mean pwat values near climatological maximum percentiles) pooling around the periphery of subtropical high over the southern Plains and lower MS Valley will interact with a surface cold front moving slowly south/southeastward from the lower Great Lakes to produce periods of showers and a few locally heavy thunderstorms across Pennsylvania later today. 17/00Z HREF indicates the potential for spot rain amounts of 2-3 inches. It's very likely that most of central PA picks up some rainfall by tonight. However, we do not anticipate an all-day rain/washout. Cloud trends remain a tough call with early morning convection over north central PA, but fcst instability this afternoon across south central PA will be more than supportive for thunderstorm development. SPC continues to maintain a general (non-severe) convective outlook for today which is likely due to the lack of deep layer shear (displaced farther to the north) and poor mid level lapse rates (very moist, tall/skinny soundings with warm cloud depths greater than 10kft). KEY MESSAGE 2: Cooler this weekend with rain returning by Sunday Another taste of Fall is on the way for the end of the week with noticeably cooler and much drier/less humid air poised to return behind the front (Td crashing into the 40s/50s). Expect a crisp and cool overnight Friday into Saturday morning with some upper 30s possible across the northern tier. Dry/fair wx conditions are forecast to start the weekend and last through the day on Saturday followed by periods of potentially heavy rainfall Saturday night through early next week. Both NAEFS and ECMWF SATs show at least 90th percentile PWs returning the the region which is supportive for at least a marginal excessive rain signal. A surface low expected to track over the Great Lakes will usher in this moisture and more than enough forcing for widespread precipitation. NBM temps have also cooled/moderated quite a bit Mon- Wed with most locations struggling to exceed 70F for daytime highs. && .AVIATION /00Z FRIDAY THROUGH TUESDAY/... Cold front across the northern mountains will drop slowly southward across the area this evening and overnight, reaching the MD border well after midnight. Scattered SHRA and isolated TSRA expected over the next few hours, as the front interacts on the warmer and more humid airmass across the south. Problem overnight will be low CIGS and fog. Conditions will improve slowly from north to south on Friday, as drier air works into the area. Outlook... Sat...AM valley fog and some MVFR ceilings S. Then VFR. Sat night-Tuesday...Periods of rain/storms with MVFR likely (70%) and IFR possible (30%) for short periods. && .CTP WATCHES/WARNINGS/ADVISORIES... None. && WHAT HAS CHANGED...Bowen KEY MESSAGES...Steinbugl/Bowen DISCUSSION...Steinbugl/Bowen AVIATION...Martin
Hazardous weather outlook, Sep 17, 1:44 PM EDT, 7 hours 32 minutes before
Hazardous Weather Outlook National Weather Service State College PA 144 PM EDT Thu Sep 17 2026 PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053- 056>059-063>066-181745- Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield- Northern Centre-Southern Centre-Cambria-Blair-Huntingdon-Mifflin- Juniata-Somerset-Bedford-Fulton-Franklin-Tioga-Northern Lycoming- Sullivan-Southern Clinton-Southern Lycoming-Union-Snyder-Montour- Northumberland-Columbia-Perry-Dauphin-Schuylkill-Lebanon-Cumberland- Adams-York-Lancaster- 144 PM EDT Thu Sep 17 2026 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. Locally heavy rain may result in isolated instances of flooding this afternoon and evening especially in locations that can experience rapid runoff. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report significant hazardous weather.
In the hours before
Special weather statement, Sep 17, 6:03 PM EDT, 3 hours 13 minutes before
Special Weather Statement
National Weather Service State College PA
603 PM EDT Thu Sep 17 2026
PAZ050>053-058-172300-
Columbia PA-Northumberland PA-Montour PA-Snyder PA-Schuylkill PA-
603 PM EDT Thu Sep 17 2026
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL SCHUYLKILL...
NORTHUMBERLAND...NORTHEASTERN SNYDER...SOUTHERN MONTOUR AND SOUTHERN
COLUMBIA COUNTIES THROUGH 700 PM EDT...
At 602 PM EDT, Doppler radar was tracking a strong thunderstorm over
Sunbury, moving southeast at 25 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Pottsville, Sunbury, Shamokin, Mount Carmel, Selinsgrove, Shenandoah,
Danville, Minersville, Mahanoy City, Frackville, Northumberland, St.
Clair, Kulpmont, Ashland, Elysburg, Fairview-Ferndale, Riverside,
Port Carbon, Trevorton, and Tremont.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Very heavy rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4056 7627 4075 7708 4088 7691 4089 7682
4092 7686 4103 7672 4086 7598
TIME...MOT...LOC 2202Z 291DEG 22KT 4085 7678
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
MartinNearby
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.