Strong winds associated with the passage of a frontal system brought down several trees across portions of the lower Susquehanna valley. Very saturated grounds from heavy rainfall likely contributed to the downed trees.
Every event with a place to put it; 4 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 episode as NWS CTP wrote it up.
Strong winds associated with the passage of a frontal system brought down several trees across portions of the lower Susquehanna valley. Very saturated grounds from heavy rainfall likely contributed to the downed trees.
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 Jan 25, 3:56 AM EST, 2 hours 4 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 356 AM EST MON JAN 25 2010 .SYNOPSIS... A STRONG COLD FRONT WILL MOVE THROUGH THE AREA TODAY ACCOMPANIED BY RAIN...WHICH MAY BE HEAVY AT TIMES INTO THE MORNING HOURS. THE FRONT WILL CLEAR THE AREA BY MONDAY AFTERNOON...USHERING IN COLDER AIR WHICH WILL PERSIST THROUGH THE UPCOMING WEEK. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... A GUSTY WARM AND RAINY NIGHT IS IN PROGRESS ACROSS THE AREA. ANOMALOUSLY HIGH DEWPOINTS PUSHING INTO THE AREA ARE A TESTAMENT TO THE STRENGTH OF THE SURGE OF TROPICAL MOISTURE TAKING PLACE ON THE NOSE OF A 50-75 KT SSE LOW LEVEL JET. WE ARE PRETTY MUCH BURIED IN THE HEIGHT OF THE STORM RIGHT NOW WITH HEAVY RAIN EXPECTED THROUGH ABOUT DAY BREAK. MODELS ARE IN DECENT AGREEMENT ON THE TIMING OF THE STRONG WAVY FRONT...BEING IN CENTRAL PA AROUND 12Z AND EAST OF THE FCST AREA BY MID AFTERNOON. IN THE MEANTIME...HUMIDITY OUTSIDE IS SOMETHING MORE REPRESENTATIVE OF LATE SPRING OR EARLY FALL WITH DEWPOINTS WELL UP INTO THE 40S TO MID 50S OVER MOST OF THE AREA. PWATS ARE RUNNING BETWEEN 1" AND 1.5"...SOME 200+% ABOVE NORMAL. STRONG LOW LEVEL JET ON THE ORDER OF +4 STD DEV OR HIGHER IS CAUSING GUSTS IN THE 25-35 KT RANGE SO FAR. CONVECTIVE INSTABILITY IS STILL RATHER LIMITED SO THE STRONGEST WINDS ARE NOT MANAGING TO MIX DOWN TO THE SURFACE...AS YET. THE ATMOSPHERE HOWEVER IS EXHIBITING SIGNS OF BEING INERTIALLY UNSTABLE GIVEN MODEL ANALYSIS AND PROGGED VALUES OF ABS VORTICITY WHICH ARE STRONGLY NEGATIVE OVER MUCH OF THE AREA DOMINATED BY THE FRONTAL ZONE. LOCALLY RUN 12KM WRF WANTS TO EVENTUALLY DEVELOP WHAT LOOKS LIKE A NARROW COLD FRONTAL RAIN BAND FEATURE...STARTING IN THE NEXT 1-2 HOURS OVER THE LAURELS AND INTENSIFYING THRU 12Z AS IT MOVES ACROSS THE FCST AREA. IF THIS SQUALL LINE TYPE FEATURE MANAGES TO FORM...STRONG DAMAGING WIND GUSTS WILL BECOME LIKELY...ASSOCIATED WITH THE TRANSFER OF STRONG WINDS DOWN TO THE SURFACE WITH THE SHOWERS. HAVE INCLUDED THE MENTION OF THUNDER THE FORECAST...HOWEVER WE HAVE SEEN SEVERAL TIMES IN THE PAST WHERE THESE FEATURES FORM...AND CAUSE DAMAGE WITH LITTLE OR NO OBSERVED THUNDER AND LIGHTNING. HIGH TEMPS WILL OCCUR EARLY IN THE DAY BEFORE STEADY LLVL CAA RESULTS IN FALLING TEMPS FROM WEST TO EAST THROUGH THE AFTN. WOULD NOT BE SURPRISED TO SEE SOME LOCATIONS OVR FAR SERN PENN TOUCH 60F IMMEDIATELY AHEAD OF THE TRIPLE POINT LOW/FNTL WAVE IN THE WARM SECTOR. FLOOD WATCH AND WIND ADVISORY CONTINUES...WITH ACTIVITY EXPECTED TO WIND DOWN LATER THIS MORNING AND AFTERNOON AS THE FRONT FINALLY CLEARS THE REGION. QPF ON THE ORDER OF 1.5 TO 2.5 INCHES SEEMS LIKELY BEFORE ALL IS SAID AND DONE. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 AM TUESDAY/... THE FRONT WILL BE EAST OF THE AREA BY EVENING...WITH COLDER AIR SWEEPING IN ON A GUSTY WEST WIND. THE COLDER AIR ASCENDING THE ALLEGHENY FRONT SHOULD MAKE FOR SOME RAIN TO SNOW SHOWERS INTO MONDAY NIGHT WITH A LIGHT ACCUMS PSBL ESP OVR THE LAUREL HIGHLANDS AND NW SNOWBELT. && .LONG TERM /TUESDAY THROUGH SUNDAY/... PATTERN FOR THE REMAINDER OF THE WEEK TURNS DECIDEDLY COOLER WITH THE USUAL WESTERN HIGH TERRAIN AND LAKE ENHANCED SNOW SHOWERS STAYING AN ISSUE THROUGH MID-WEEK. NEXT FROPA STILL SLATED FOR THURS WITH PERHAPS A BURST OF WAA SNOW...FOLLOWED BY MORE OROGRAPHICALLY/LAKE ENHANCED SNOW SHOWERS TO ROUND OUT THE WEEK. MAIN UNCERTAINTY IN THE LONG RANGE INVOLVES POTNL PHASING OF THE LARGE SCALE SPLIT FLOW REGIME BY NEXT WEEKEND. OPERATIONAL MDLS AND ENSEMBLES SHOW SFC LOW DEVELOPMENT INVOF THE GULF STREAM...BUT TOO EARLY TO SPECULATE ON ANY DETAILS ATTM. WILL CONT TO MENTION REDUNDANT CHC OF SNOW IN THE LATER PDS OF THE FCST. && .AVIATION /08Z MONDAY THROUGH FRIDAY/... WIDESPREAD IFR/LIFR CIGS & VSBYS THROUGH THIS MORNING AS PERIODS OF MODERATE TO HEAVY RAIN FALL OVR CENTRAL PA. LLWS WILL ALSO BE AN ISSUE EARLY THIS MORNING...AS A POWERFUL SOUTHERLY LOW LVL JET MOVES OVR THE AREA...WHILE RELATIVELY LIGHTER SE WINDS PERSIST AT THE SFC. COLD FRONT WILL PUSH THRU CENTRAL PA DURING LATE MORNING/EARLY AFTN...LIKELY ACCOMPANIED AND FOLLOWED BY STRONG WIND GUSTS. BUFKIT SOUNDINGS INDICATE GUSTS TO ARND 40KTS LIKELY OVR MUCH OF THE REGION EARLY THIS AFTN AS WINDS SHIFT TO THE WSW IN WAKE OF COLD FRONT. SCT -SHSN AND MVFR CIGS ARE LIKELY TO PERSIST LATE TODAY AND TONIGHT WHERE RESIDUAL LOW LVL MOISTURE ASCENDS THE APPALACHIANS AT KBFD AND KJST. ELSEWHERE...A RETURN TO VFR CONDS IS EXPECTED LATE TDY AND TONIGHT. HOWEVER...A GUSTY WEST WIND WILL PERSIST OVR THE ENTIRE REGION TONIGHT. OUTLOOK... TUE...SHSN NW MTNS. WED...NO SIG WX EXPECTED. THUR...SHSN N AND W MTNS. FRI...LGT SNOW POSS SOUTH. && .HYDROLOGY... WIDESPREAD HEAVY RAINS OF 1.5"-2.5" ARE EXPECTED FOR STORM TOTALS. COLD-SEASON HYDROLOGIC IMPACTS COMBINED WITH THE FCSTD RNFL WILL BRING SIGNIFICANT RISES OF AROUND 3/4 BANKFULL ALONG THE LWR WEST BRANCH AND MAIN STEM SUSQ. RISES ALONG THE JUNIATA ARE FCST TO BE AROUND 1/2 BANKFULL. AREAS MOST SUSCEPTIBLE TO MINOR FLOODING WILL BE THE SMALLER STREAMS/CREEKS/TRIBS FROM THE JUNIATA TO THE LWR MAIN STEM. CRESTS ARE GENERALLY MON-TUE WITH SEVERAL POINTS GOING ABOVE CAUTION AND SOME NEAR FLOOD STAGE. RESIDUAL/MELTING ICE MAY ALSO LEAD TO JAMMING AS THE ICE BECOMES DISLODGED WITHIN SMALLER STREAM CHANNELS. && .CTP WATCHES/WARNINGS/ADVISORIES... FLOOD WATCH THROUGH THIS EVENING FOR PAZ004>006-010>012- 017>019-024>028-033>037-041-042-045-046-049>053-056>059- 063>066. WIND ADVISORY UNTIL 3 PM EST THIS AFTERNOON FOR PAZ019-024>028- 033>036-049>053-056>059-063>066. && SYNOPSIS...LA CORTE NEAR TERM...LA CORTE SHORT TERM...LA CORTE LONG TERM...LA CORTE/STEINBUGL AVIATION...FITZGERALD HYDROLOGY...LA CORTE
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 425 AM EST MON JAN 25 2010 PAZ004>006-010>012-017-018-037-041-042-045-046-260930- WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD- NORTHERN CENTRE-TIOGA-NORTHERN LYCOMING-SULLIVAN-SOUTHERN CLINTON- SOUTHERN LYCOMING- 425 AM EST MON JAN 25 2010 ...FLOOD WATCH IN EFFECT THROUGH THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TODAY 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. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. PAZ019-024>028-033>036-049>053-056>059-063>066-260930- SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-JUNIATA-SOMERSET- BEDFORD-FULTON-FRANKLIN-UNION-SNYDER-MONTOUR-NORTHUMBERLAND-COLUMBIA- PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-ADAMS-YORK-LANCASTER- 425 AM EST MON JAN 25 2010 ...WIND ADVISORY IN EFFECT UNTIL 3 PM EST THIS AFTERNOON... ...FLOOD WATCH IN EFFECT THROUGH THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TODAY 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. WIND ADVISORY. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED.
The national radar mosaic for the moment the first event began.
4 strong wind. Local standard time, as filed.
Strong winds estimated between 40 and 50 mph brought down several trees and wires across the county. Some minor roof damage was also reported.
Strong winds estimated between 40 and 50 mph brought down several trees and wires across the county.
Strong winds estimated between 40 and 50 mph brought down several trees and wires across the county.
Strong winds estimated between 40 and 50 mph brought down several trees and wires across the county.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2010Every state in 2010This day in weather historyWarnings in Pennsylvania, January 2010
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 2026-10-01. Each event’s entry at NCEI: 204355, 204356, 204357, 204358.