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 30, 2:19 AM EST, 1 hour 41 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 319 AM EDT MON AUG 30 2004 .AVIATION... SOUTHERLY FLOW...ISOLATED RAIN SHOWERS AND RAIN FROM EARLIER TODAY WILL MAINTAIN MOIST LOW LEVEL CONDS ACROSS THE REGION AND SUPPORT WIDESPREAD MVFR TO LOCALIZED IFR VIS DUE TO FOG/HAZE OVERNIGHT. POCKETS OF HAZE WILL CONTINUE THROUGH THE DAY. ISOLATED TO SCT SHOWERS/TSTMS WILL BE POSSIBLE THROUGH THE FCST PD ...MORE SO THIS AFT AND TONIGHT AS SLOW MVG COLD FRONT AND REMNANTS OF GASTON AFFECT THE REGION. && .SHORT TERM (TODAY)... THE STORY REMAINS THE SAME AS STALLED BOUNDARY AND RIBBON OF MDT-HIGH PWATS (1.5 TO 1.75) AND INSTABILITY COMBINE TO PRODUCE NUMEROUS SHOWERS AND THUNDERSTORMS WITH LOCALLY HEAVY RAINFALL ACROSS CENTRAL PA. THE GOOD NEWS IS THAT ZONAL FLOW ALOFT WILLARRIVE AND NUDGE BOUNDARY EASTWARD LATER TODAY AND TONIGHT...BRINGING AN END TO THE HEAVY RAIN THREAT. RICH MOISTURE LIFTING NORTHWARD FROM TROPICAL STORM GASTON ONLY EXPECTED TO SKIRT FAR SOUTHEAST SECTIONS ENHANCING WHAT IS ALREADY A LOCALLY HEAVY RAIN THREAT FOR TONIGHT. DAY SHIFT MAY NEED TO CONSIDER FFA ISSUANCES FOR OVERNIGHT AS THIS DEEPER MOISTURE FOCUSES ON THE EASTWARD PROGRESSING BOUNDARY. && .LONG TERM (TONIGHT THROUGH SUNDAY)... SHOWERS WILL END ACROSS NORTHWEST SECTIONS LATE TONIGHT AS LAYER PWS DECREASE BELOW 0.75 LATE...AGAIN THANKS TO THE ARRIVAL OF DRIER ZONAL FLOW. TUESDAY WILL BE A TRANSITIONAL DAY ACROSS THE CENTRAL AND EAST AS DRIER AIR GRADUALLY FILTERS IN THROUGHOUT THE DAY. WINDS EXPECTED TO TURN MOSTLY FROM THE NORTH AS REMNANTS OF GASTON MERGE WITH THE FRONT WITH A LOW CENTER TRACKING TOWARDS CAPE COD. THUS...BREEZY AND MUCH MORE COMFORTABLE CONDITIONS IN STORE TUESDAY AFTERNOON EVERYWHERE. WARM AND DRY CONDS EXPECTED TO PREVAIL FOR THE REMAINDER OF THE WEEK ON WEST/NORTHWEST FLOW ALOFT WITH 5H HEIGHTS REMAINING AROUND 588 DM. SOME HINT OF A BACKDOOR FRONT THU-FRI AS SFC HIGH TRACKS ACROSS QUEBEC...NORTHERN MAINE AND THEN OFFSHORE SOUTHERN NEW ENGLAND INDUCING EASTERLY FLOW ACROSS THE MIDATLANTIC REGION. THIS A LOW PROBABILITY EVENT AT THIS TIME...AND WILL MAINTAIN PERSISTENCE FOR THE 7-DAY FORECAST THIS MORNING BUT SOMETHING TO WATCH THIS WEEK... IN ADDITION TO HURRICANE FRANCES WHICH IS STILL PROJECTED TO CROSS THE BAHAMAS THU-FRI AND CURL NORTHWARD TOWARDS THE SOUTHEASTERN U.S. COAST. && .CTP WATCHES/WARNINGS/ADVISORIES... PA...NONE. && AVIATION/SHORT TERM...GARTNER LONG TERM...DEVOIR
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 1229 PM EDT SUN AUG 29 2004 PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053- 056>059-063>066-301627- ADAMS PA-BEDFORD PA-BLAIR PA-CAMBRIA PA-CAMERON PA-CLEARFIELD PA- COLUMBIA PA-CUMBERLAND PA-DAUPHIN PA-ELK PA-FRANKLIN PA-FULTON PA- HUNTINGDON PA-JUNIATA PA-LANCASTER PA-LEBANON PA-MCKEAN PA- MIFFLIN PA-MONTOUR PA-NORTHERN CENTRE PA-NORTHERN CLINTON PA- NORTHERN LYCOMING PA-NORTHUMBERLAND PA-PERRY PA-POTTER PA- SCHUYLKILL PA-SNYDER PA-SOMERSET PA-SOUTHERN CENTRE PA- SOUTHERN CLINTON PA-SOUTHERN LYCOMING PA-SULLIVAN PA-TIOGA PA- UNION PA-WARREN PA-YORK PA- 1229 PM EDT SUN AUG 29 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TODAY: SHOWERS AND THUNDERSTORMS WITH LOCALLY HEAVY RAINFALL WILL FOCUS ALONG A STALLED FRONTAL BOUNDARY ACROSS CENTRAL AND WESTERN PORTIONS OF CENTRAL PENNSYLVANIA THIS AFTERNOON AND TONIGHT. A FLOOD WATCH HAS BEEN POSTED FOR THE WESTERN HALF OF CENTRAL PENNSYLVANIA THROUGH 900 PM THIS EVENING. IN ADDITIONAL...SOME OF THE THUNDERSTORMS MAY STRENGTHEN TO AROUND SEVERE LEVELS...PRODUCING BRIEF WIND GUSTS AROUND 60 MPH. LARGE HAIL WILL BE A LESSER THREAT SINCE TEMPERATURES ARE QUITE WARM THROUGH THE MID LEVELS OF THE ATMOSPHERE. @0059 .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY: THE REMNANTS OF TROPICAL STORM GASTON...CURRENTLY CENTERED JUST NORTH OF CHARLESTON SOUTH CAROLINA...WILL MOVE SLOWLY NORTH OVER THE INTERSTATE 95 CORRIDOR THROUGH MONDAY NIGHT. LOCALLY HEAVY RAIN OF OVER 2 INCHES IS POSSIBLE MONDAY AND MONDAY NIGHT ACROSS THE LOWER SUSQUEHANNA VALLEY...WHICH WILL BE CLOSEST TO THE STORMS PATH. A FLOOD WATCH MAY BE ISSUED LATER TODAY FOR MUCH OF THE SUSQUEHANNA RIVER VALLEY...WHICH WOULD LIKELY BE VALID MONDAY AND MONDAY NIGHT.
The State College radar (KCCX), 109 km away, was scanning. The volume nearest the first event began at 09:01 UTC.
1 flash flood. Local standard time, as filed.
Heavy rain caused flash flooding in McKean County, mainly in the city of Bradford and in Foster Township. Numerous roads were closed due to high water and mudslides.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2004Every state in 2004This day in weather historyWarnings in Pennsylvania, August 2004
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: 5421310.