1 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 Sep 18, 2:05 PM EST, 4 hours 55 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 305 PM EDT SAT SEP 18 2004 .AVIATION... VFR CONDS TO RULE THROUGH THE FCST PERIOD. THE ONLY EXCEPTION WOULD BE A FEW OF THE VALLEY LOCATIONS WHICH MAY DIP TO MVFR IN FOG AROUND SUNRISE. THE WINDS WILL INHIBIT FOG FORMATION IN MOST PLACES...BUT KIPT AND EVEN KUNV AND KAOO MAY DIP TO 3 MILES. && .SHORT TERM (TONIGHT THROUGH TUESDAY)... THE RAIN HAS ENDED BUT MANY RIVERS STILL RESPONDING AND EXPECTED TO CREST LATER TODAY OR SUNDAY. SEE KCTP FLOOD WARNINGS AND HYDRO STATEMENTS FOR DETAILS. NO PCPN...IN FACT A GOOD DEAL OF SUNSHINE EXPECTED IN THE SHORT TERM AS SFC HI BUILDS OVER THE REGION AND TAKES UP RESIDENCE INTO NEXT WEEK. EXPECT SOME PATCHY FOG OVERNIGHT...ESP IN THE VALLEYS...GIVEN OVERLY ABUNDANT RAINFALL. WINDS HOWEVER SHOULD BE A LIMITING FACTOR AS THEY REMAIN NORTHERLY 5-10MPH MOST PLACES. VERY COOL NIGHTS IN STORE TONIGHT AND SUNDAY NIGHT. WITH LIGHTER WINDS SUN NIGHT FROST POSS SOME LOCATIONS SUNDAY NIGHT. DAYTIME MAX TEMPS WILL MODERATE INTO MID WEEK. && .LONG TERM (TUESDAY NIGHT THROUGH SATURDAY)... NO RAIN EXPECTED THRU MOST OF THE LONG TERM AS WELL...AS SFC HIGH PRS UNDER BUILDING UPR RIDGE DOMINATES THE REGION. NEXT BEST CHANCE OF PCPN IS DAY 7/NEXT SAT WHEN FRONTAL SYSTEM ASSCD WITH UPR LOW MOVING OUT OF PLAINS WILL APPROACH THE REGION. && .CTP WATCHES/WARNINGS/ADVISORIES... PA...NONE. && AVIATION...DANGELO SHORT TERM/LONG TERM...GARTNER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 448 AM EDT SAT SEP 18 2004 PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053- 056>059-063>066-190844- 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- 448 AM EDT SAT SEP 18 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TODAY: HEAVY RAIN WILL TAPER OFF OVER THE SUSQUEHANNA VALLEY BY LATE MORNING. HOWEVER...FLOODING WILL CONTINUE THROUGH MUCH OF THE DAY OVER ALL OF CENTRAL PENNSYLVANIA...WITH THE EXCEPTION OF THE NORTHWEST MOUNTAINS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY: ALTHOUGH FLOODING OF SMALLER STREAMS AND LOW LYING AREAS WILL SUBSIDE BY LATE SATURDAY...FLOODING ON MANY OF THE LARGER RIVERS WILL OCCUR SUNDAY AND A PORTION OF MONDAY. .SPOTTER CALL TO ACTION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED.
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Heavy rain caused the Susquehanna River at Danville to exceed its flood stage of 20 feet. The river rose above flood stage at 19:00 EST on the 18th, crested at 26.22 feet at 15:30 on the 19th, and fell below flood stage at 20:30 EST on the 20th.
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, September 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: 5422791.