Alert archive / Pennsylvania / Flash Flood Warnings in 2026
Flash Flood Warning 61, NWS State College, PA
NWS State College, PA issued this flash flood warning at Aug 11, 2026, 3:08 AM EDT for Somerset County, Pennsylvania. It was in force for 3 hr. 4 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
- Aug 11, 2026, 3:08 AM EDT (07:08 UTC)
- Expired
- Aug 11, 2026, 6:00 AM EDT
- In force
- 3 hr
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Somerset County, PA
The radar
The Pittsburgh radar (KPBZ), 111 km from the middle of the area, began a volume at 07:08 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 |
|---|---|---|---|
| Aug 11, 4:31 AM EDT | FLASH FLOOD | 5 Nnw Casselman, PA | Water rescue on Barron Church Rd by Scottyland Park, with people on top of a truck in moving waters. |
| Aug 11, 5:45 AM EDT | FLASH FLOOD | 1 S Rockwood, PA | Rockdale Road flooded and impassable. 12 to 14 inch rocks washed across the road being removed. |
| Aug 11, 5:50 AM EDT | FLASH FLOOD | Confluence, PA | Charles Street in Confluence flooded and impassable. |
| Aug 11, 6:10 AM EDT | FLASH FLOOD | 5 Nw Casselman, PA | Scottyland Park flooded with several water rescues from flooded homes. |
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 3 storm reports to this flash flood warning; the first came 83 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, 7.1 hours before the alert went out and 94 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
- 1554 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 691 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 209 m²/s²
- 0-3 km storm-relative helicity
- 264 m²/s²
- Significant tornado parameter
- 1.8
- Supercell composite
- 12.1
The text
As transmitted.
487
WGUS51 KCTP 110708
FFWCTP
PAC111-111000-
/O.NEW.KCTP.FF.W.0061.260811T0708Z-260811T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service State College PA
308 AM EDT Tue Aug 11 2026
The National Weather Service in State College has issued a
* Flash Flood Warning for...
Southwestern Somerset County in south central Pennsylvania...
* Until 600 AM EDT.
* At 308 AM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 3 and 4 inches of rain
have fallen over the past several hours. Additional rainfall
amounts of 0.5 to 1.5 inches are possible in the warned area prior
to daybreak. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...County 911.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Ursina, Mount Davis, Rockwood, Confluence, Addison and Casselman.
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.
Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3998 7934 3996 7924 3992 7916 3986 7912
3977 7909 3973 7912 3972 7917 3972 7939
3973 7939 3973 7941 3974 7941 3974 7939
3976 7940 3977 7938 3978 7939 3979 7935
3979 7937 3982 7937 3985 7942 3990 7940
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
Lambert/TeareWhat 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 Aug 10, 10:51 PM EDT, 4 hours 17 minutes earlier. Its key messages:
- 1) Additional storms are expected overnight. 2) Humid with rounds of heavy showers and strong thunderstorms focused over southwest Pennsylvania through midweek
Area forecast discussion, Aug 10, 10:51 PM EDT, 4 hours 17 minutes before
Area Forecast Discussion National Weather Service State College PA 1051 PM EDT Mon Aug 10 2026 .WHAT HAS CHANGED... * Tweaked overnight PoPs with upstream convection inbound. && .KEY MESSAGES... 1) Additional storms are expected overnight. 2) Humid with rounds of heavy showers and strong thunderstorms focused over southwest Pennsylvania through midweek && .DISCUSSION... KEY MESSAGE 1: Additional storms are expected overnight. Big convective complex rolling through OH at 1030PM, and making moves for SWrn PA. While our area will get clipped by these storms, the stable low levels here should preclude severe wind. Heavy rain is likely where they do fall. So, flash flooding may be a threat for the latter half of tonight, but the majority of guidance takes the most-organized and heaviest precip just south of the CWA. NAM12 and RAP13 did well last night/early Mon AM with the progression of storms then. Leaning on those solutions right now yields a cluster of storms arriving in a few hours over the SW and spreading N and E a bit before fizzling. ----------------------------------------------------------- KEY MESSAGE 2: Humid with rounds of heavy showers and strong thunderstorms focused over southwest Pennsylvania through midweek Model trends are focusing primary risk for severe storms and heavy rain across southwest PA on Tuesday. This area lies closest to the equatorward edge of the westerlies within very moist instability gradient. SPC and WPC have outlooked this area (SW PA) with a a level 2/5 severe storm risk and 2/4 excessive rain risk. Rounds of showers and storms remain possible through midweek. Multiple shortwave disturbances will traverse the northern tier and interact with a slow moving frontal zone. The combination of rich low level moisture, instability and repeated forcing along the boundary will support some potential for periodic clusters of storms with locally heavy rainfall. WPC excessive rain outlooks (EROs) have shifted farther to the south/west and only clip the far southwest portion of the CWA on days 3-5 or Wed-Fri. The end of the week into the start of the weekend looks less humid (more refreshing) as push of relatively cooler and drier air accompanies seasonably strong/Canadian high pressure building southeast from the Upper Midwest. && .AVIATION /02Z TUESDAY THROUGH SATURDAY/... A few showers linger in Central PA, but any isolated overnight -RA is most likely from upslope effects at JST and BFD. Conditions will waffle between MVFR and VFR this evening through the overnight hours as low level moisture remains over the area. Patchy -RA is possible over the higher elevation airfields through the morning hours. Widespread fog development and IFR visibilities is only confident at BFD. Elsewhere, low level moisture content may be enough for some mist and some MVFR visibilities, but confidence isn't high enough for anything lower at this time. MVFR conditions continues into the morning with an improvement to VFR in the later morning/early afternoon. Isolated to scattered afternoon thunderstorms are possible, but confidence isn't high enough for impacts at any one site yet, restrictions are possible though. Storms moving in from the northwest may cause restrictions towards the end of the forecast period at JST and AOO. Outlook... Mon-Thu...Scattered showers/storms. Restrictions possible. Fri...Mainly VFR. A few showers or storms possible over southwestern PA. Sat...Mainly VFR. Isolated shower/storms possible in the afternoon. && .CTP WATCHES/WARNINGS/ADVISORIES... None. && WHAT HAS CHANGED...Dangelo KEY MESSAGES...Dangelo DISCUSSION...Lambert/Dangelo/Steinbugl AVIATION...Lambrech/Tyburski
Hazardous weather outlook, Aug 10, 6:08 PM EDT, 9 hours before
Hazardous Weather Outlook National Weather Service State College PA 608 PM EDT Mon Aug 10 2026 PAZ004>006-010>012-037-041-042-045-046-049>053-058-112215- Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Tioga- Northern Lycoming-Sullivan-Southern Clinton-Southern Lycoming-Union- Snyder-Montour-Northumberland-Columbia-Schuylkill- 608 PM EDT Mon Aug 10 2026 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Thunderstorms with locally heavy rain are possible Tuesday and Wednesday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. PAZ017>019-024>028-033>036-056-057-059-063>066-112215- Clearfield-Northern Centre-Southern Centre-Cambria-Blair-Huntingdon- Mifflin-Juniata-Somerset-Bedford-Fulton-Franklin-Perry-Dauphin- Lebanon-Cumberland-Adams-York-Lancaster- 608 PM EDT Mon Aug 10 2026 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Thunderstorms with strong to severe wind gusts and locally heavy rain are possible Tuesday. Heavy rain is also possible on Wednesday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Special weather statement, Aug 10, 11:29 PM EDT, 3 hours 39 minutes before
Special Weather Statement
National Weather Service State College PA
1129 PM EDT Mon Aug 10 2026
PAZ033-110430-
Somerset PA-
1129 PM EDT Mon Aug 10 2026
...SEVERAL STRONG THUNDERSTORMS WILL IMPACT SOUTHWESTERN SOMERSET
COUNTY THROUGH 1230 AM EDT...
At 1126 PM EDT, Doppler radar was tracking several strong
thunderstorms along a line extending from Uniontown to 13 miles
southeast of Connellsville to near Bittinger. These storms will
train across the same portions of southern Somerset County bringing
between 0.5 to 1.5 inches of rain between 1130 pm and 1230 AM.
Movement was east southeast at 35 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Meyersdale, Ursina, Mount Davis, Confluence, Salisbury, Garrett,
Addison, Wellersburg, Casselman, and Callimont.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Locally very heavy rainfall is also occurring with these storms and
may lead to localized flooding. Do not drive your vehicle through
flooded roadways.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
Persons in campgrounds should consider seeking sturdy shelter until
these storms pass.
&&
LAT...LON 3972 7938 3973 7941 3977 7938 3978 7939
3979 7938 3978 7935 3980 7937 3982 7937
3985 7942 3990 7940 3993 7938 3988 7910
3973 7880 3972 7881
TIME...MOT...LOC 0326Z 284DEG 31KT 3995 7967 3985 7946 3969 7933
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
LambertSpecial weather statement, Aug 11, 12:23 AM EDT, 2 hours 45 minutes before
Special Weather Statement
National Weather Service State College PA
1223 AM EDT Tue Aug 11 2026
PAZ033-034-110515-
Bedford PA-Somerset PA-
1223 AM EDT Tue Aug 11 2026
...STRONG THUNDERSTORMS WILL IMPACT SOUTHWESTERN BEDFORD AND SOUTHERN
SOMERSET COUNTIES THROUGH 115 AM EDT...
At 1222 AM EDT, Doppler radar was tracking several strong
thunderstorms along a line extending from Connellsville to 16 miles
southwest of Somerset to 11 miles northwest of Frostburg. These
storms will train across the same portions of southern Somerset
County bringing an additional 0.5 to 1.0 inch of rain between 1230
AM and 130 AM. Movement was southeast at 35 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Meyersdale, Ursina, New Centerville, Mount Davis, Lake Gordon,
Rockwood, Confluence, Salisbury, Garrett, Addison, Wellersburg,
Casselman, Callimont, and Seven Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Very heavy rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
Persons in campgrounds should consider seeking sturdy shelter until
these storms pass.
&&
LAT...LON 3973 7941 3977 7938 3978 7939 3979 7938
3978 7935 3980 7937 3982 7937 3986 7942
3999 7933 4004 7928 3983 7874 3973 7863
3972 7938
TIME...MOT...LOC 0422Z 301DEG 32KT 3996 7963 3989 7934 3978 7907
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
LambertThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 11:29 PM EDT | Special Weather Statement | CTP | Somerset | 61 min |
| Aug 11, 12:23 AM EDT | Special Weather Statement | CTP | Somerset | 52 min |
| Aug 11, 1:03 AM EDT | Severe Thunderstorm Warning | CTP | Somerset | 42 min |
| Aug 11, 1:14 AM EDT | Flash Flood Warning | CTP | Somerset | 7 hr |
| Aug 11, 2:38 AM EDT | Flood Watch | CTP | Somerset | 18 hr |
| Aug 11, 3:23 AM EDT | Flash Flood Warning | CTP | Somerset | 5 hr |
| Aug 11, 4:50 AM EDT | Special Weather Statement | CTP | Cameron, Centre, Clinton | 25 min |
| Aug 11, 5:06 AM EDT | Severe Thunderstorm Warning | CTP | Warren | 32 min |
| Aug 11, 8:27 AM EDT | River Flood Warning | CTP | Somerset | 3 hr |
| Aug 11, 8:29 AM EDT | Areal Flood Warning | CTP | Somerset | 3 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.