Alert archive / Pennsylvania / Flash Flood Warnings in 2026
Flash Flood Warning 72, NWS State College, PA
NWS State College, PA issued this flash flood warning at Aug 27, 2026, 6:41 PM EDT for Franklin County, Pennsylvania. It was in force for 3 hr. 1 report 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 27, 2026, 6:41 PM EDT (22:41 UTC)
- Expired
- Aug 27, 2026, 9:45 PM EDT
- In force
- 3 hr
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Flood severity
- None
County Franklin County, PA
The radar
The Sterling radar (KLWX), 110 km from the middle of the area, began a volume at 22:44 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 27, 6:44 PM EDT | FLASH FLOOD | 4 Nne Mercersburg, PA | Flooded roadways. |
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 one storm report to this flash flood warning; the first came 3 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.7 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
- 728 J/kg
- Mixed-layer CIN
- -107 J/kg
- Mixed-layer LCL
- 980 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 145 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.7
The text
As transmitted.
579
WGUS51 KCTP 272241
FFWCTP
PAC055-280145-
/O.NEW.KCTP.FF.W.0072.260827T2241Z-260828T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service State College PA
641 PM EDT Thu Aug 27 2026
The National Weather Service in State College has issued a
* Flash Flood Warning for...
Southwestern Franklin County in south central Pennsylvania...
* Until 945 PM EDT.
* At 641 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 3 inches of rain
have fallen. Additional rainfall amounts up 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...
St. Thomas, Mercersburg, Fort Loudon and Williamson.
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 3996 7792 3994 7776 3986 7777 3982 7781
3982 7793 3989 7797 3992 7795 3992 7796
3993 7795 3994 7795 3995 7794
FLASH FLOOD...RADAR INDICATED
$$
Dangelo1 follow-up statement
766
WGUS71 KCTP 280142
FFSCTP
Flash Flood Statement
National Weather Service State College PA
942 PM EDT Thu Aug 27 2026
PAC055-280152-
/O.EXP.KCTP.FF.W.0072.000000T0000Z-260828T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Franklin PA-
942 PM EDT Thu Aug 27 2026
...FLASH FLOOD WARNING WILL EXPIRE AT 945 PM EDT THIS EVENING FOR
SOUTHWESTERN FRANKLIN COUNTY...
Flood waters are receding. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
&&
LAT...LON 3996 7792 3994 7776 3986 7777 3982 7781
3982 7793 3989 7797 3992 7795 3992 7796
3993 7795 3994 7795 3995 7794
$$
DangeloWhat 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 27, 2:55 PM EDT, 3 hours 46 minutes earlier. Its key messages:
- 1) Scattered strong to severe thunderstorms this afternoon into tonight 2) Flooding downpours possible this afternoon into tonight in the Lower Susquehanna Valley 3) Variable sky conditions for the lunar eclipse tonight
Area forecast discussion, Aug 27, 2:55 PM EDT, 3 hours 46 minutes before
Area Forecast Discussion National Weather Service State College PA 255 PM EDT Thu Aug 27 2026 .WHAT HAS CHANGED... Thunderstorms have begun to develop in two areas of focus, ahead of the cold front in NW PA and along a stationary sfc trough in the southeast. && .KEY MESSAGES... 1) Scattered strong to severe thunderstorms this afternoon into tonight 2) Flooding downpours possible this afternoon into tonight in the Lower Susquehanna Valley 3) Variable sky conditions for the lunar eclipse tonight && .DISCUSSION... KEY MESSAGE 1: Scattered strong to severe thunderstorms possible this afternoon into tonight. Scattered thunderstorms are expected to continue to develop this afternoon ahead of a cold front across CPA and within a sfc pressure trough in the southeast. SPC has continued the level 2/5 (SLGT) severe t-storm risk which extends from the eastern slopes of the Allegheny Mtns eastward. MLCAPE of 1500 J/kg and 0-6 km shear near 30 kts in the north suggests a few low end supercells may develop. Weaker shear and stronger CAPE in the SE suggests more pulse cells to start, but storm motion from SW to NE is well aligned with the sfc pressure trough so upscale growth into one or more slow moving / training lines is likely as we head into this evening. The strongest cells and clusters will be capable of producing scattered damaging winds and at least isolated hail. Modestly curved low- level hodographs may also support some brief tornado potential. The severe threat should persist into the evening before storms weaken/exit the eastern part of the CWA. ------------------------------------------------------------- KEY MESSAGE 2: Flooding downpours possible this afternoon into tonight across portions of the Lower Susquehanna Valley A healthy influx of moisture via southwest flow will increase PWATs to 1.50-1.75" across the Lower Susquehanna Valley by this afternoon. CAMs suggest the heaviest 2-4+ inch rain amounts will remain east of the CWA, but still suggest local bullseyes of 1-2" in our southeastern zones along the weak pre frontal/lee sfc trough. A couple rounds of heavy t-storm downpours are possible with rain rates 1-2"/hr that could result in scattered areas of flash flooding. Based on the +RA signal in the hires ensembles and coordination with WFO PHI, a flash flood watch continues for Schuylkill, Lebanon, and Lancaster Counties. A drying trend is forecast Friday into the last weekend of August, thanks to high pressure building into the area behind the cold front. This will likely setup a couple of foggy mornings (Friday and Saturday). Rainfall looks fairly limited heading into the first week of September; however despite the start of meteorological Fall the summer is not over with temps expected to rise above the historical average into the 80-90 degree range. ------------------------------------------------------------- KEY MESSAGE 3: Variable sky conditions for the lunar eclipse tonight. Forecast viewing conditions for the lunar eclipse range from fair to poor tonight across central PA. The eclipse will begin at 10:34 pm EDT and last for about 3 hours, ending at 1:52 am EDT Friday. The worst view is most likely over the eastern half of CPA due to exiting storms and associated cloud cover. Clouds and low fog are also poised to develop in the NW during the latter half of the eclipse. The eclipse will take place during August's full moon, commonly referred to as the Sturgeon Moon. It will also be the last full moon of the summer with the next full moon set to rise a few nights after the autumnal (Fall) equinox on September 22nd. && .AVIATION /18Z THURSDAY THROUGH TUESDAY/... Kept all sites with thunder Probs this afternoon, confidence is highest at MDT and LNS with higher storm coverage expected in eastern PA. Brief drops to IFR visibilities in these downpours along with gusty winds, possibly in excess of 40kts, may accompany these storms. Outside of storms, generally VFR conds for the remainder of the afternoon. With high pressure building in the wake of the storms this afternoon, tonight into Friday morning looks to see fog and low ceilings building in, possibly into the LIFR category across the north and west. Region- wide restrictions into Friday morning are possible, trending towards VFR again late Fri afternoon through the remainder of the TAF period. Outlook... Sat...AM Fog; otherwise VFR. Sun-Mon...Mainly VFR. Tue...Chc afternoon SHRA/TSRA. && .CTP WATCHES/WARNINGS/ADVISORIES... Flood Watch until 2 AM EDT Friday for PAZ058-059-066. && WHAT HAS CHANGED...Steinbugl/Colbert KEY MESSAGES...Steinbugl/Colbert DISCUSSION...Steinbugl/Colbert AVIATION...Colbert/Lambrech
Hazardous weather outlook, Aug 27, 3:53 PM EDT, 2 hours 48 minutes before
Hazardous Weather Outlook National Weather Service State College PA 353 PM EDT Thu Aug 27 2026 PAZ005-010-011-017-024-033-280800- McKean-Elk-Cameron-Clearfield-Cambria-Somerset- 353 PM EDT Thu Aug 27 2026 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. Scattered strong to severe thunderstorms are possible this afternoon and early this evening. Localized damaging wind gusts and hail may accompany these storms. .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. PAZ012-018-019-026>028-035-036-041-042-045-046-049>053-056-057- 063>065-280800- Northern Clinton-Northern Centre-Southern Centre-Huntingdon-Mifflin- Juniata-Fulton-Franklin-Northern Lycoming-Sullivan-Southern Clinton- Southern Lycoming-Union-Snyder-Montour-Northumberland-Columbia-Perry- Dauphin-Cumberland-Adams-York- 353 PM EDT Thu Aug 27 2026 ...SEVERE THUNDERSTORM WATCH 632 IN EFFECT UNTIL 10 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. .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. PAZ006-025-034-037-280800- Potter-Blair-Bedford-Tioga- 353 PM EDT Thu Aug 27 2026 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...This afternoon and tonight. Scattered strong to severe thunderstorms are possible this afternoon and evening. Localized damaging wind gusts and hail may accompany these storms. .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. PAZ004-280800- Warren- 353 PM EDT Thu Aug 27 2026 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...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. PAZ058-059-066-280800- Schuylkill-Lebanon-Lancaster- 353 PM EDT Thu Aug 27 2026 ...FLOOD WATCH IN EFFECT UNTIL 2 AM EDT FRIDAY... ...SEVERE THUNDERSTORM WATCH 632 IN EFFECT UNTIL 10 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. Flood Watch. Severe Thunderstorm Watch. .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. Martin
In the hours before
Local storm report, Aug 27, 6:29 PM EDT, 12 minutes before
Preliminary Local Storm Report
National Weather Service State College PA
629 PM EDT Thu Aug 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0627 PM Tstm Wnd Dmg 1 NNW Fannettsburg 40.06N 77.84W
08/27/2026 Franklin PA 911 Call Center
Telephone pole brought down on a vehicle, no
injuries.
&&
ANKLocal storm report, Aug 27, 6:30 PM EDT, 11 minutes before
Preliminary Local Storm Report...Corrected
National Weather Service State College PA
630 PM EDT Thu Aug 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0612 PM Tstm Wnd Dmg 1 NNW Fannettsburg 40.06N 77.84W
08/27/2026 Franklin PA 911 Call Center
Corrects previous tstm wnd dmg report from 1
NNW Fannettsburg. Telephone pole brought
down on a vehicle, no injuries.
&&
ANKSpecial weather statement, Aug 27, 6:32 PM EDT, 9 minutes before
Special Weather Statement
National Weather Service State College PA
632 PM EDT Thu Aug 27 2026
PAZ028-050-052-272315-
Northumberland PA-Juniata PA-Snyder PA-
632 PM EDT Thu Aug 27 2026
...A STRONG THUNDERSTORM WILL IMPACT WEST CENTRAL NORTHUMBERLAND...
NORTHEASTERN JUNIATA AND CENTRAL SNYDER COUNTIES THROUGH 715 PM
EDT...
At 632 PM EDT, Doppler radar was tracking a strong thunderstorm 17
miles southwest of Selinsgrove, moving northeast at 25 mph.
HAZARD...Wind gusts up to 50 mph and penny 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...
Selinsgrove, Hummels Wharf, Middleburg, Kreamer, Port Trevorton,
Penns Creek, Richfield, Mount Pleasant Mills, Paxtonville,
Meiserville, Fremont, Beavertown, New Berlin, Freeburg, and
Selinsgrove Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
central Pennsylvania.
&&
LAT...LON 4060 7709 4059 7714 4065 7726 4087 7705
4086 7702 4087 7700 4088 7697 4079 7676
TIME...MOT...LOC 2232Z 229DEG 21KT 4067 7715
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH
TeareLocal storm report, Aug 27, 6:39 PM EDT, 2 minutes before
Preliminary Local Storm Report
National Weather Service State College PA
639 PM EDT Thu Aug 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0638 PM Flash Flood 1 SSE Muncy Valley 41.33N 76.59W
08/27/2026 Sullivan PA 911 Call Center
Water rescue.
&&
ANKLocal storm report, Aug 27, 6:40 PM EDT, 1 minute before
Preliminary Local Storm Report
National Weather Service State College PA
640 PM EDT Thu Aug 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0634 PM Flash Flood Hughesville 41.24N 76.73W
08/27/2026 Lycoming PA Public
Road flooding and closed roads.
&&
ANKLocal storm report, Aug 27, 6:41 PM EDT, 0 minutes before
Preliminary Local Storm Report
National Weather Service State College PA
641 PM EDT Thu Aug 27 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0631 PM Flash Flood 2 SSE Muncy Valley 41.33N 76.59W
08/27/2026 Sullivan PA Trained Spotter
Severe road flooding.
&&
ANKThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 2:55 AM EDT | Flood Watch | CTP | Lancaster, Lebanon, Schuylkill | 22 hr |
| Aug 27, 1:52 PM EDT | Special Weather Statement | CTP | Cumberland | 38 min |
| Aug 27, 2:18 PM EDT | Special Weather Statement | CTP | Clinton | 27 min |
| Aug 27, 2:46 PM EDT | Special Weather Statement | CTP | Clinton | 44 min |
| Aug 27, 3:06 PM EDT | Special Weather Statement | CTP | Lycoming | 39 min |
| Aug 27, 3:34 PM EDT | Special Weather Statement | CTP | Elk | 26 min |
| Aug 27, 4:09 PM EDT | Special Weather Statement | CTP | Lancaster | 36 min |
| Aug 27, 4:19 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 56 min |
| Aug 27, 4:24 PM EDT | Special Weather Statement | CTP | Sullivan | 51 min |
| Aug 27, 4:43 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Sullivan | 47 min |
| Aug 27, 5:02 PM EDT | Special Weather Statement | CTP | Lycoming | 28 min |
| Aug 27, 5:03 PM EDT | Special Weather Statement | CTP | Dauphin | 42 min |
| Aug 27, 5:15 PM EDT | Special Weather Statement | CTP | Berks | 15 min |
| Aug 27, 5:26 PM EDT | Special Weather Statement | CTP | Sullivan | 34 min |
| Aug 27, 5:32 PM EDT | Special Weather Statement | CTP | Clinton | 28 min |
| Aug 27, 5:42 PM EDT | Special Weather Statement | CTP | Sullivan | 33 min |
| Aug 27, 5:48 PM EDT | Special Weather Statement | CTP | Lycoming | 42 min |
| Aug 27, 5:56 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin, Fulton | 49 min |
| Aug 27, 6:11 PM EDT | Special Weather Statement | CTP | Clinton | 34 min |
| Aug 27, 6:13 PM EDT | Special Weather Statement | CTP | Lebanon | 47 min |
| Aug 27, 6:17 PM EDT | Special Weather Statement | CTP | Sullivan | 43 min |
| Aug 27, 6:23 PM EDT | Flash Flood Warning | CTP | Lycoming, Sullivan | 4 hr |
| Aug 27, 6:32 PM EDT | Special Weather Statement | CTP | Snyder | 43 min |
| Aug 27, 6:35 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Montour, Sullivan | 40 min |
| Aug 27, 6:50 PM EDT | Special Weather Statement | CTP | Lebanon | 40 min |
| Aug 27, 6:52 PM EDT | Flash Flood Warning | CTP | Lancaster, Lebanon | 3 hr |
| Aug 27, 6:54 PM EDT | Special Weather Statement | CTP | Cumberland, Perry | 51 min |
| Aug 27, 6:56 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin, Snyder | 21 min |
| Aug 27, 7:10 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Perry | 50 min |
| Aug 27, 7:14 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Sullivan | 46 min |
| Aug 27, 7:22 PM EDT | Flash Flood Warning | CTP | Columbia, Lycoming, Sullivan | 3 hr |
| Aug 27, 7:22 PM EDT | Special Weather Statement | CTP | Huntingdon | 23 min |
| Aug 27, 7:22 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon | 38 min |
| Aug 27, 7:47 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Juniata, Northumberland, Perry, Schuylkill, Snyder | 28 min |
| Aug 27, 7:49 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 41 min |
| Aug 27, 7:52 PM EDT | Severe Thunderstorm Warning | CTP | Franklin, Huntingdon, Juniata, Mifflin, Perry | 38 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.