1 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The local office's own words before the first event, 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 the first event at Aug 10, 1:25 PM EST, 20 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 225 PM EDT FRI AUG 10 2001 BUSY AFTN HERE AT CTP. IT APPRS THAT SEVERE THREAT WILL BE OVER FAIRLY SOON. RAIN COOLED AIR IS PENETRATING INTO THE LOWER SUSQ SHUTTING DOWN THE LO LVL FUEL FOR THE TSRA. OTHER MORE WIDELY SCT SHRA/TSRA ARE DEVELOPING OVER SW PA AND THESE ARE MOVG TOWARD THE LAURELS. FURTHER NORTH...THE RAIN IS OVER. DEWPTS ARE LOWERING INTO THE 60S OVER THE FAR NW WITH DEWPT IN ERI DOWN TO 59F. DEWPT IN BFD AND JHW HAVE BEEN HANGING UP AROUND 67F DESPITE A WSHFT INTO THE N. THIS IS DISTURBING BECAUSE WE MAY SEE THE DRIER AIR HANG UP N OF THE MTNS EVEN WITH THE WSHFTG INTO THE N AND NE TONIGHT. THE FRONT STALLS JUST S OF OUR CWA AND THEN RETURNS AS A WARM FRONT SUNDAY. DRIER AIR ALOFT WILL HOLD DOWN THE SHRA CHC SAT BUT MOISTURE RETURNS SUNDAY AND I WILL UP THE POPS FOR SUN. S OF THE N MTNS TEMPS WILL BE MORE SEASONABLE OVER THE WEEKEND BUT DEWPTS WILL REMAIN IN THE 60S. ALG THE N BORDER THE DEWPTS WILL BE IN THE 50S AND WITH SEASONABLE TEMPS COMFORTABLE AIR WILL BE THE RULE. .CTP...NONE HEAD
PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053- 056>059-063>066-102115- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 1113 AM EDT FRI AUG 10 2001 ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS ALL OF CENTRAL PENNSYLVANIA THIS AFTERNOON INTO EARLY THIS EVENING... A STRONG COLD FRONT JUST ENTERING ERIE COUNTY AT MIDDAY WILL CROSS THE NORTHWEST COUNTIES OF PENNSYLVANIA EARLY THIS AFTERNOON. THE FRONT WILL REACH THE SOUTHERN BORDER OF THE COMMONWEALTH LATE TONIGHT. THE AIRMASS AHEAD OF THE FRONT IS EXTREMELY WARM AND HUMID. THIS WILL SERVE AS FUEL FOR THE THUNDERSTORMS...WHICH WILL INTENSIFY AND BECOME MORE NUMEROUS ACROSS THE REGION AFTER 1 PM. THE BEST CHANCE OF THUNDERSTORMS WILL BE EARLY THIS AFTERNOON IN THE WARREN AND BRADFORD AREA. FURTHER SOUTH AND EAST...THUNDERSOTRMS ARE LIKELY THROUGH MID AFTERNOON FROM CLEARFIELD TO STATE COLLEGE TO WELLSBORO. THUNDERSTORMS WILL LINGER INTO THE EVENING OVER THE LOWER SUSQUEHANNA VALLEY. KEEP A WATCHFUL EYE ON THE SKY FOR THE THREAT OF SEVERE WEATHER...ESPECIALLY IF YOU PLAN TO BE OUTDOORS IN RURAL AREAS. SINCE MID LEVELS OF THE ATMOSPHERE ARE VERY WARM...THE PRIMARY THREAT FROM THE THUNDERSTORMS WONT BE SEEN IN THE FORM OF HAIL BUT RATHER WILL COME IN THE FORM OF DAMAGING WIND GUSTS...FREQUENT LIGHTNING AND LOCALLY TORRENTIAL RAINS. ALTHOUGH TEMPERATURES WILL CLIMB TO AROUND 90 IN THE LOWER AND MIDDLE SUSQUEHANNA VALLEY THIS AFTERNOON...THE HEAT INDEX WILL LIKELY TOP OUT AROUND 100. WHILE UNCOMFORTABLE...HEAT INDEX VALUES BELOW 105 DEGREES ARE GENERALLY NOT DANGEROUS AND ARE MUCH LOWER THAN WE HAVE SEEN FOR THE PAST THREE DAYS. KEEP TUNED TO YOUR FAVORITE SOURCE OF NATIONAL WEATHER SERVICE INFORMATION THIS AFTERNOON ON EITHER NOAA WEATHER RADIO...COMMERCIAL RADIO OR TELEVISION STATIONS FOR THE LATEST WEATHER INFORMATION THROUGHOUT THE DAY. FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT WWW.NWS.NOAA.GOV/ER/CTP HEAD
PAZ036-056>059-063>066-102345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 1245 PM EDT FRI AUG 10 2001 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PORTIONS OF SOUTH CENTRAL PENNSYLVANIA UNTIL 800 PM EDT... THE SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE FOLLOWING COUNTIES: ADAMS...CUMBERLAND...DAUPHIN...FRANKLIN...LANCASTER...LEBANON... PERRY...SCHUYLKILL...AND YORK SHOWERS AND THUNDERSTORMS HAVE DEVELOPED OVER SOUTHERN PENNSYLVANIA EARLY THIS AFTERNOON. THESE THUNDERSTORMS HAVE THE POTENTIAL TO BECOME SEVERE LATER THIS AFTERNOON AND INTO EARLY EVENING HOURS STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER DETAILS OR UPDATES. FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT WWW.NWS.NOAA.GOV/ER/CTP ONDREJIK
The national radar mosaic for the moment the first event began.
1 flash flood. Local standard time, as filed.
4.5 inches of rain was reported from thunderstorms in Lebanon County. Flooding was reported along Route 72 near Lebanon. Also, several basements were flooded.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2001Every state in 2001This day in weather historyWarnings in Pennsylvania, August 2001
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5260650.