Alert archive / Pennsylvania / Flash Flood Warnings in 2026
Flash Flood Warning 59, NWS State College, PA
NWS State College, PA issued this flash flood warning at Aug 10, 2026, 2:54 PM EDT for Franklin County, Pennsylvania. It was in force for 95 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 10, 2026, 2:54 PM EDT (18:54 UTC)
- Expired
- Aug 10, 2026, 4:29 PM EDT
- In force
- 95 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Flood severity
- None
County Franklin County, PA
The radar
The State College radar (KCCX), 110 km from the middle of the area, began a volume at 18:58 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.
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
Washington/Dulle, VA (KIAD), launched 12:00Z, 6.9 hours before the alert went out and 115 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
- 682 J/kg
- Mixed-layer CIN
- -91 J/kg
- Mixed-layer LCL
- 1254 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- -34 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.6
The text
As transmitted.
778
WGUS51 KCTP 101854
FFWCTP
PAC055-102200-
/O.NEW.KCTP.FF.W.0059.260810T1854Z-260810T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service State College PA
254 PM EDT Mon Aug 10 2026
The National Weather Service in State College has issued a
* Flash Flood Warning for...
Central Franklin County in south central Pennsylvania...
* Until 600 PM EDT.
* At 254 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 of 1 to 2 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...
Chambersburg, Guilford, St. Thomas, Fayetteville, Scotland and Fort
Loudon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3989 7747 3988 7747 3989 7796 3994 7794
3995 7794 3996 7794 3997 7793 3999 7792
4000 7792 4001 7791 4002 7786 4000 7749
3999 7748 3999 7747 3998 7747 3998 7746
3997 7745 3995 7747
FLASH FLOOD...RADAR INDICATED
$$
Bauco1 follow-up statement
637
WGUS71 KCTP 102029
FFSCTP
Flash Flood Statement
National Weather Service State College PA
429 PM EDT Mon Aug 10 2026
PAC055-102039-
/O.CAN.KCTP.FF.W.0059.000000T0000Z-260810T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Franklin PA-
429 PM EDT Mon Aug 10 2026
...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL FRANKLIN COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
&&
LAT...LON 3989 7747 3988 7747 3989 7796 3994 7794
3995 7794 3996 7794 3997 7793 3999 7792
4000 7792 4001 7791 4002 7786 4000 7749
3999 7748 3999 7747 3998 7747 3998 7746
3997 7745 3995 7747
$$
BaucoWhat 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, 1:14 PM EDT, 1 hour 40 minutes earlier. Its key messages:
- 1) Thunderstorms with severe wind gusts and locally heavy rain will be likely this afternoon and evening 2) Humid with rounds of heavy showers and strong thunderstorms focused over southwest Pennsylvania through midweek
Area forecast discussion, Aug 10, 1:14 PM EDT, 1 hour 40 minutes before
Area Forecast Discussion National Weather Service State College PA 114 PM EDT Mon Aug 10 2026 .WHAT HAS CHANGED... * Level 2/5 severe thunderstorm risk expanded eastward for today. SVR TSTM Watches #552 and #553 in effect through mid afternoon and early evening respectively. && .KEY MESSAGES... 1) Thunderstorms with severe wind gusts and locally heavy rain will be likely this afternoon and evening 2) Humid with rounds of heavy showers and strong thunderstorms focused over southwest Pennsylvania through midweek && .DISCUSSION... KEY MESSAGE 1: Thunderstorms with severe wind gusts and locally heavy rain will be likely this afternoon and evening 1 pm EDT update: Blossoming, albeit still bkn line of strong to severe TSRA extending from the Ncent Mtns SW to the Greater Pittsburgh area at 17Z with a movement to the east at 30-35 kts. 2 distinct MCVs (one along the PA/NY border and the second just to the SE of KPBZ will enhance both rainfall and deep layer speed and directional shear, with several mini supercells breaking out to the east and SE of both mesoscale features. Expect updrafts to strengthen as they move into the zone of max SB CAPE of 2000-3000 J/KG (across Scent PA and developing into the Lower Susq Valley. Mesoscale warm front to the east of both MCVs will lead to a 1-2 hour period of training TSRA with heavy to briefly torrential rainfall rates (over 2 inches per hour) and localized flash flooding possible. Previous... Small clusters of sub-severe storms over the NW quad of PA at 0730Z have been weakening as they track to the east per radar and IR satellite trends. This activity appears to be associated with subtle vortmax feature near the OH/PA line. We adjusted POPs higher near/north of I80 to account for this as the storms continue to track eastward through daybreak. The question remains what the convective evolution will be from around midday through the afternoon and evening. HREF/REFS model data favors intensification of t-storm clusters reaching the northwest PA vicinity by midday and tracking east-southeast through the afternoon. If this scenario plays out, storms will likely pose a risk for damaging wind gusts within a humid and moderately unstable airmass. SPC expanded the level 2/5 SLGT risk eastward and now includes all of the Lower Susquehanna Valley. ----------------------------------------------------------- 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 /18Z MONDAY THROUGH SATURDAY/... 12Z TAF Update: A loosely organized cluster of showers and thunderstorms is moving across central PA as of 1030Z, located around KJST/KAOO/KUNV, corresponding to lift along the leading edge of higher PWATs (up to around 1.5") and instability (MUCAPE to 1000 J/kg). This activity may continue into our eastward terminals between 12Z-14Z Monday (KMDT/KLNS, and perhaps KIPT depending the northern extent of this convection), with additional rounds of convection to be monitored later today. Otherwise, discussion points remain largely the same as with the 06Z TAF discussion provided below. Previous discussion: Remnant MCS over western PA as of 06Z will track eastward through the morning hours, likely decaying as it encounters limited instability (MUCAPE of 100-250 J/kg east of the Allegheny Ridge). Timing this feature out across the terminals, PROB30s for -TSRA were included between 08Z-14Z, with confidence still low regarding the system's evolution. Relatively steep mid-level lapse rates of around 6-7 C/km with eastward extent may allow for the system to persist for longer, while relatively limited moisture (PWATs of around 1") and the lower MUCAPE favor a continued downtrend. For this time, the feature was timed out in case it persists. Low-level moisture may support a period of MVFR cumulus as the boundary layer deepens during the morning/afternoon hours, with higher confidence in MVFR ceilings over our westernmost terminals (KBFD/KJST) & decreasing confidence with eastward extent. Otherwise, the main window for aviation hazards is expected to be the afternoon/evening from scattered thunderstorms, with moderate instability (MLCAPE of around 1500 J/kg), decent support for gusty downdraft winds (DCAPE around 1000 J/kg), and favorable wind shear for organized convection (35 kts of 0-6 km wind shear) in place. This parameter space supports multicell clusters and squall lines capable of gusty to locally severe wind gusts. Timing of these potential storms will depend on upstream initiation and organization, with cold pool development potentially accelerating storm motion. Storm coverage/intensity is expected to decrease after 00Z Tuesday, though additional showers/thundershowers can't be ruled out. VFR is currently favored at most terminals Monday night, with the main exception being KBFD where onshore flow from the Great Lakes may bring restrictions due to low stratus and mist. Outlook... Mon-Thu...Scattered showers/storms. Restrictions possible. Fri...Mainly VFR. A few showers or storms possible over southwestern PA. && .CTP WATCHES/WARNINGS/ADVISORIES... None. && WHAT HAS CHANGED...Lambert/Steinbugl KEY MESSAGES...Lambert/Steinbugl DISCUSSION...Lambert/Steinbugl AVIATION...Teare
Hazardous weather outlook, Aug 10, 2:36 PM EDT, 18 minutes before
Hazardous Weather Outlook National Weather Service State College PA 236 PM EDT Mon Aug 10 2026 PAZ006-011-012-017>019-024>027-033>035-037-041-042-045-046-111845- Potter-Cameron-Northern Clinton-Clearfield-Northern Centre- Southern Centre-Cambria-Blair-Huntingdon-Mifflin-Somerset-Bedford- Fulton-Tioga-Northern Lycoming-Sullivan-Southern Clinton- Southern Lycoming- 236 PM EDT Mon Aug 10 2026 ...SEVERE THUNDERSTORM WATCH 552 IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON... This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and 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...Tuesday through Sunday. Thunderstorms with locally heavy rain are possible Tuesday and Wednesday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. PAZ028-036-049>053-056>059-063>066-111845- Juniata-Franklin-Union-Snyder-Montour-Northumberland-Columbia-Perry- Dauphin-Schuylkill-Lebanon-Cumberland-Adams-York-Lancaster- 236 PM EDT Mon Aug 10 2026 ...SEVERE THUNDERSTORM WATCH 553 IN EFFECT UNTIL 7 PM EDT THIS EVENING... This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and 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. Thunderstorms with severe wind gusts and locally heavy rain will be possible this afternoon and evening. .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. PAZ004-005-010-111845- Warren-McKean-Elk- 236 PM EDT Mon Aug 10 2026 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and 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.
In the hours before
Local storm report, Aug 10, 1:52 PM EDT, 1 hour 2 minutes before
Preliminary Local Storm Report
National Weather Service State College PA
152 PM EDT Mon Aug 10 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1250 PM Tstm Wnd Dmg 1 SE Snow Shoe 41.02N 77.94W
08/10/2026 Centre PA Utility Company
Trees down on wires along Uzzell Road.
&&Local storm report, Aug 10, 1:55 PM EDT, 59 minutes before
Preliminary Local Storm Report
National Weather Service State College PA
155 PM EDT Mon Aug 10 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1245 PM Tstm Wnd Dmg 2 W Snow Shoe 41.03N 77.99W
08/10/2026 Centre PA Utility Company
Trees down on wires along Bumbarger Road.
&&Special weather statement, Aug 10, 1:55 PM EDT, 59 minutes before
Special Weather Statement
National Weather Service State College PA
155 PM EDT Mon Aug 10 2026
PAZ041-042-046-049-051>053-101845-
Columbia PA-Southern Lycoming PA-Sullivan PA-Union PA-
Northumberland PA-Northern Lycoming PA-Montour PA-
155 PM EDT Mon Aug 10 2026
...STRONG THUNDERSTORMS WILL IMPACT NORTHWESTERN NORTHUMBERLAND...
MONTOUR...EASTERN LYCOMING...COLUMBIA...NORTHEASTERN UNION AND
SULLIVAN COUNTIES THROUGH 245 PM EDT...
At 155 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 10 miles southeast of Canton to Milton.
Movement was east at 45 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...
Bloomsburg, Berwick, Milton, Montoursville, Muncy, Watsontown,
Hughesville, Montgomery, Mifflinville, Lightstreet, Almedia, New
Columbia, Fernville, Allenwood, Buckhorn, Jerseytown, Rupert,
Rohrsburg, Iola, and Jamison City.
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.
A Severe Thunderstorm Watch remains in effect until 300 PM EDT for
north central Pennsylvania. A Severe Thunderstorm Watch also remains
in effect until 700 PM EDT for central Pennsylvania.
&&
LAT...LON 4097 7705 4111 7697 4159 7682 4154 7622
4149 7624 4131 7631 4120 7632 4113 7627
4114 7623 4103 7623 4099 7622
TIME...MOT...LOC 1755Z 269DEG 38KT 4156 7669 4101 7688
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
BaucoLocal storm report, Aug 10, 2:01 PM EDT, 53 minutes before
Preliminary Local Storm Report
National Weather Service State College PA
201 PM EDT Mon Aug 10 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0129 PM Tstm Wnd Dmg 3 W Garrett 39.86N 79.12W
08/10/2026 Somerset PA 911 Call Center
Tree down on both lanes of Rockdale Road in
Summit Township.
&&
JBLLocal storm report, Aug 10, 2:07 PM EDT, 47 minutes before
Preliminary Local Storm Report
National Weather Service State College PA
207 PM EDT Mon Aug 10 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0135 PM Tstm Wnd Dmg 4 SE Somerset 39.96N 79.02W
08/10/2026 Somerset PA 911 Call Center
Two Trees down near the intersection of
Plank Road and Beachdale Road.
&&
JBLLocal storm report, Aug 10, 2:54 PM EDT, 0 minutes before
Preliminary Local Storm Report
National Weather Service State College PA
254 PM EDT Mon Aug 10 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0225 PM Tstm Wnd Dmg 3 WSW Saint Thomas 39.92N 77.80W
08/10/2026 Franklin PA Utility Company
Trees down on wires along St. Thomas
Edenville Road.
&&The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 6:52 AM EDT | Special Weather Statement | CTP | Huntingdon | 38 min |
| Aug 10, 7:27 AM EDT | Special Weather Statement | CTP | Franklin | 33 min |
| Aug 10, 7:41 AM EDT | Special Weather Statement | CTP | Cumberland, Perry | 34 min |
| Aug 10, 8:08 AM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Dauphin, Perry, York | 52 min |
| Aug 10, 8:51 AM EDT | Severe Thunderstorm Warning | CTP | Adams, Dauphin, Lancaster, York | 39 min |
| Aug 10, 10:13 AM EDT | Special Weather Statement | CTP | Warren | 32 min |
| Aug 10, 10:34 AM EDT | Severe Thunderstorm Warning | CTP | Warren | 41 min |
| Aug 10, 11:14 AM EDT | Severe Thunderstorm Warning | CTP | Elk, McKean, Warren | 46 min |
| Aug 10, 11:35 AM EDT | Flash Flood Warning | CTP | McKean | 3 hr |
| Aug 10, 11:39 AM EDT | Special Weather Statement | CTP | Elk | 36 min |
| Aug 10, 11:53 AM EDT | Severe Thunderstorm Warning | CTP | Cameron, Elk, McKean, Potter | 52 min |
| Aug 10, 12:32 PM EDT | Special Weather Statement | CTP | Centre, Clinton | 58 min |
| Aug 10, 12:43 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield, Clinton | 47 min |
| Aug 10, 12:53 PM EDT | Special Weather Statement | CTP | Tioga | 52 min |
| Aug 10, 1:13 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Somerset | 47 min |
| Aug 10, 1:20 PM EDT | Special Weather Statement | CTP | Clinton | 25 min |
| Aug 10, 1:30 PM EDT | Special Weather Statement | CTP | Lycoming | 30 min |
| Aug 10, 1:35 PM EDT | Special Weather Statement | CTP | Franklin | 25 min |
| Aug 10, 1:55 PM EDT | Special Weather Statement | CTP | Columbia, Montour, Sullivan | 50 min |
| Aug 10, 2:02 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Franklin | 43 min |
| Aug 10, 2:06 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 39 min |
| Aug 10, 2:43 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Franklin | 47 min |
| Aug 10, 2:45 PM EDT | Severe Thunderstorm Warning | CTP | York | 45 min |
| Aug 10, 3:10 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon | 25 min |
| Aug 10, 3:27 PM EDT | Severe Thunderstorm Warning | CTP | York | 48 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.