Alert archive / Pennsylvania / Areal Flood Advisories in 2009
Areal Flood Advisory 10, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at May 23, 2009, 4:34 PM EDT for Lehigh County, Northampton County, Pennsylvania. It was in force for 85 min.
The area
The counties it named.
The facts
- Issued
- May 23, 2009, 4:34 PM EDT (20:34 UTC)
- Expired
- May 23, 2009, 5:59 PM EDT
- In force
- 85 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 120 km from the middle of the area, began a volume at 20:34 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 forecasters said that day
The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this areal flood advisory went out at May 23, 3:30 PM EDT, 1 hour 4 minutes earlier.
Area forecast discussion, May 23, 3:30 PM EDT, 1 hour 4 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 330 PM EDT SAT MAY 23 2009 .SYNOPSIS... A WEAK FRONT ACROSS THE FORECAST AREA WILL MOVE NORTH AS A WARM FRONT TONIGHT. A COLD FRONT OVER THE GREAT LAKES WILL MOVE SLOWLY SOUTHEAST AND START PASSING THROUGH THE FORECAST AREA ON SUNDAY AND CLEAR SOUTHERN DELAWARE ON MONDAY. THIS FRONT WILL STALL MONDAY NIGHT NEAR VIRGINIA BEFORE IT TOO STARTS MOVING BACK AS A WARM FRONT TUESDAY INTO WEDNESDAY. A COLD FRONT SHOULD THEN MOVE THROUGH THE MIDDLE ATLANTIC STATES LATE THURSDAY OR FRIDAY. HIGH PRESSURE SHOULD THEN START BUILDING INTO THE REGION FOR NEXT WEEKEND. && .NEAR TERM /THROUGH TONIGHT/... THE GFS HAD A MUCH BETTER INITIALIZATION THAN THE WRF-NMM AT 12Z. THE WRF-NMM INITIALIZATION OF THE GULF OF MEXICO LOW WHICH WAS TOO FAR SOUTH AND MAY EXPLAIN ITS OVERALL SLOWER EVOLUTION OF SYSTEMS. THE COLD FRONT THAT WAS TRYING TO WORK ITS WAY SOUTH ACROSS OUR CWA IS STARTING TO PIVOT ACROSS OUR CWA. THIS WAS ONE OF THOSE INTERSTATE 195 SPECIALS AS BELMAR WAS SITTING AT 66 WHILE WE AT MOUNT HOLLY WERE IN THE UPPER 80S EARLY THIS AFTERNOON. SINCE THEN THE FRONT HAS WORKED ITS WAY NORTH INTO THE LEHIGH VALLEY, BUT WAS STILL BEING PIVOTED TO THE SOUTH NEAR THE NEW JERSEY SHORE. A FOG BANK OFFSHORE HAS MADE IT INTO PART OF THE CENTRAL NJ COAST. THIS MORNINGS 12Z ANALYSIS WAS NOT SHOWING A PLETHORA OF MOISTURE AT 850MB. THIS PROBABLY EXPLAINS WHY IN SPITE OF REACHING THE CONVECTIVE TEMP AND HAVING SFC BASED CAPES ON LAPSE EXCEEDING 1000J, ITS BEEN HARD TO MUSTER ANY THUNDER ON THE SOUTH SIDE OF THIS BOUNDARY IN NJ AND DELAWARE. THE INTENSIFYING SHORT WAVE FCST BY THE GFS IS HARD TO FIND IN VA AND WAS NOT FOLLOWED. ALSO WHAT UPPER AIR SUPPORT IN TERMS OF SHORT WAVES ARE IN THE NORTHERN PART OF OUR CWA AND THAT IS WHERE SHRAS AND ISOLATED TSRAS ARE CURRENTLY OCCURRING. THIS CONDUIT IS EXPECTED TO REMAIN ACTIVE THROUGH TOMORROW. AS FORECAST WEAK WARM AIR ADVECTION COUPLED WITH DEEPER MOISTURE SHOULD CONTINUE PCPN CHANCES. WHILE THE ENVIRONMENTAL WINDS ARE STRONGER TODAY THAN THEY ARE EXPECTED TO BE ON SUNDAY, MOST OF THE PRESENT CAPE NORTH IS FAIRLY HIGH BASED AND HAS A VERY SKINNY PROFILE. THUS THE THERMODYNAMICS AND KINEMATICS ARE NOT IN SYNC THIS AFTERNOON AND IS OUR REASONING TO BELIEVE THAT NEARLY ALL TSRAS SHOULD REMAIN BELOW SVR LIMITS LATER THIS AFTN AND NIGHT IN OUR CWA. WE TRIED TO FOLLOW THE FCST WAA AS DEPICTED BY THE GFS TO CUT OFF THE MENTION OF HIGHER POPS AFTER MIDNIGHT WHICH SHOULD LIFT NE WITH THE ENVIRONMENTAL FORCING. LASTLY AS FAR AS THE FOG BANK GOES, AN INTENSIFYING SSW WIND ABOVE THE DECK SHOULD START PUSHING BOTH THE FOG BANK AND THE WARM FRONT BACK TO THE NORTH EVEN ALONG THE SHORE. WE DID INCLUDE THE MENTION OF PATCHY FOG INTO THIS EVENING BEFORE WE EXPECT IT TO BE E OR NE OF OUR CWA. WE DID LOWER MIN TEMPS BLO GUIDANCE ALONG THAT PART OF COASTAL NJ. && .SHORT TERM /SUNDAY THROUGH MONDAY NIGHT/... THE APPROACHING COLD FRONT ON SUNDAY SHOULD PROVIDE A TRIGGERING MECHANISM FOR FURTHER CONVECTION. UNLIKE TODAY IT APPEARS THAT THE THERMODYNAMICS AND KINEMATICS SHOULD BE BETTER ALIGNED. THE OVERALL ENVIRONMENTAL WINDS ARE FCST TO BE WEAKER, BUT THE NORTHERN PART OF OUR CWA WILL BE CLOSER TO THE EXIT REGION OF THE H250 JET AND ALSO IN AN AREA OF POSITIVE MID LVL QVEC CONVERGENCE. A COUPLE OF WEAK SHORT WAVES ARE FCST TO MOVE THRU THIS REGION. OVERALL THERE APPEARS ENOUGH OF A TRIGGERING SUPPORT. THE QUESTION REMAINS WHETHER OR NOT THE 2000J OF FCST CAPE CAN THRIVE IN A RELATIVELY WEAK SHEARED ENVIRONMENT AND FCST MID LVL LAPSE RATES THAT ARE PATHETIC. THE ONE FAVORABLE FEATURE IS THAT THE FCST DROP OF THETA E WITH HEIGHT IS ABOUT 20C AND THAT IS WITHIN THE PULSE SVR TSRA RANGE. ALSO USING 20KT AS THE EFFECTIVE CUT OFF OF SHEAR FOR SVR VS NON SVR DOES PLACE THE NORTHERN PART OF OUR CWA BARELY WITHIN RANGE. AGREE WITH THE SEE TEXT APPROACH THAT SPC HAS ISSUED FOR DAY2 UPSHOT WE WILL UP POPS TO LIKELY ACROSS THE NORTHERN PART OF OUR CWA WHERE ALL OF THESE PARAMETERS GET STACKED AND IS ALSO COINCIDENTAL WITH THE FCST 850MB THETA E RIDGE ON BOTH THE GFS AND WRF-NMM. BECAUSE OF ANY OTHER SUPPORT FEATURES WE HAVE SCALED BACK THE MENTION OF TSRA MORE AND MORE TO THE SOUTH. WE HAVE TRIED TO INCLUDE SOME OF THE ONGOING RESEARCH WORK BY DR PAUL CROFT ABOUT INITIATIVES TO CONVECTION IN W OR NW FLOW IN JUNE (OK ITS STILL MAY). THIS FAVORS OUR HIGHER TERRAIN LOCATIONS AND CONVERSELY THE FLOW WOULD NOT TAKE IT INTO THE SOUTHERN PART OF OUR CWA DURING THE DAY ON SUNDAY. MOS GUIDANCE HAS BEEN A BIT LOW WITH MAX TEMPS AND WE WILL BE GOING ABOVE THEM ON SUNDAY. FOR SUNDAY NIGHT AND MONDAY COULD SEE A PCPN SHAFT ZONE THAT INCLUDES PART OF THE LOCAL PHL METRO AREA. THE SERIES OF SHORT WAVES ARE FCST TO REMAIN NORTH SO THE SOUTHWARD EXTENT OF PCPN WILL DEPEND UPON HOW ORGANIZED THE CONVECTION CAN GET GOING DURING THE DAY ON SUNDAY. AS IT IS WE TRIED TO CONVEY A MORE EWD THAN SWD SAG OF HIGHEST PCPN CHCS FOR SUNDAY NIGHT. ON MONDAY THE LATEST MODEL GUIDANCE IS SHOWING IT TOO STABLE FOR THUNDER ALTHOUGH SOME UNDERRUNNING SHRAS MIGHT OCCUR TO THE NORTH OF THE SHALLOWING COLD FRONT. WE KEPT THE MENTION OF THUNDER IN FOR NOW TO SEE IF THIS TREND CONTINUES. WE KEPT A LITTLE NORTHWARD LEE-WAY OF PCPN CHANCES INTO THE PHL METRO PENDING THE FRONTAL MOVEMENT, BUT THERE IS ENOUGH OF MODEL CONSENSUS AND TREND TO REMOVE POPS FAR N. GOING TO COMPROMISE BTWN THE MOS DATASETS FOR MINS AND MAX TEMPS SUN NGT AND MON. THE GFS IS OFTEN TOO FAST EVEN IF ITS INITIALIZATION IS GOOD. && .LONG TERM /TUESDAY THROUGH SATURDAY/... UNSETTLED WEATHER REMAINS THE KEY FOR THIS OUTLOOK PERIOD. EMERGING FROM A RELATIVELY DRY PATTERN, WE WILL BE GETTING WET AGAIN. AN OVERRUNNING RAIN APPEARS LIKELY FOR TUESDAY INTO EARLY WEDNESDAY. AS A WARM FRONT WILL START LIFTING TOWARD OUR CWA AND HIGH PRESSURE SLIDES OFF OF NEW ENGLAND. RIGHT NOW CONVECTIVE PARAMETERS ARE NOT FAVORING ANY THUNDER AS THIS WARM FRONT LIFTS NORTHWARD. WEDNESDAY AND WEDNESDAY NIGHT SHOULD FEATURE A NORTH TO SOUTH POP GRADIENT AS THE FRONTAL BOUNDARY IS EXPECTED TO LIFT NORTH INTO NEW ENGLAND WITH OUR LOWEST CHANCES IN DELMARVA. THERE IS DECENT MODEL CONSENSUS FOR THURSDAY TO BE THE CENTERPIECE OF THE NEXT ENHANCED CHANCE FOR PRECIPITATION AND DEPENDING UPON THE COLD FRONTAL POSITION COULD BE QUITE CONVECTIVELY ACTIVE. AS AN EXAMPLE SOME GFS RUNS HAVE FCST LIFTED INDICES OF -8C. FRIDAY WILL DEPEND UPON HOW QUICKLY THE FRONT MOVES THROUGH OUR CWA, WE ARE CURRENTLY OPTING FOR THE SLOWER ECMWF SOLUTION AND NEXT SATURDAY AS OF NOW APPEARS DRY. TUESDAY COULD BE RELATIVELY CHILLY BY LATE MAY STANDARDS, BUT AS WE EMERGE IN THE WARM SECTOR, WEDNESDAY AND ESPECIALLY THURSDAY HAVE THE POTENTIAL TO BE WARMER THAN THE 00Z GFS MOS GUIDANCE HAD. WE MIGHT BE IN ANOTHER DIURNAL PATTERN WHERE 00Z GFS MOS IS TOO LOW, BUT 12Z MOS APPEARS MORE REPRESENTATIVE. OPTING FOR THE SLOWER SOLUTION WE ARE WARMER THAN GFS MOS FOR FRIDAY AND THEN DID NOT STRAY MUCH FROM GFS MOS GUIDANCE SATURDAY. && .AVIATION /19Z SATURDAY THROUGH THURSDAY/... THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY AND SURROUNDING AREAS. THE WEAK FRONTAL ZONE THAT MOVED INTO OUR AREA LAST NIGHT CONTINUES TO DROP SLOWLY SOUTH ALONG THE NJ COAST. IT HAD STOPPED ITS SOUTHERN PROGRESS OVER EASTERN PA. AT 2 PM IT RAN FROM NORTH OF ATLANTIC CITY TO NORTH OF PHILLY TO JUST SOUTH OF ALLENTOWN. A WINDSHIFT TO ENE OCCURRED ONCE THE FRONT PASSED. ALONG COASTAL SECTIONS, THERE WAS ALSO A TEMPERATURE DROP. COMPUTER MODELS SHOW THIS FEATURE HEADING BACK NORTH OVERNIGHT. VFR CONDITIONS PREVAILED THROUGHOUT OUR AREA TODAY WITH MID CLOUDS NORTH AND SCT TO BKN CU AND CI SOUTH. SHOWERS AND TSTMS ARE NOW BEGINNING TO FORM OVER THE CENTRAL PA MOUNTAINS. THEY WILL MOVE ENE AND THREATEN NORTHERN PORTIONS OF OUR FORECAST AREA THROUGH THE EVENING HOURS. NOT A HIGH PROBABILITY OF GETTING ANY SHOWERS/TSTMS AT ANY OF OUR TAF SITES. WILL ONLY GO WITH THE MENTION OF A CB IN ABE AND RDG. WITH DEW POINTS RELATIVELY HIGH AND WINDS DROPPING OFF LATER TONIGHT, COULD BE SOME LIGHT FOG FORMING IN SOME AREAS. WILL CARRY A TEMPO GROUP FOR MVFR VSBY IN ABE, RDG, AND MIV IN THE HOURS JUST PRIOR TO AND AROUND DAYBREAK. OTHERWISE, MID AND HIGH CLOUDS SHOULD PREVAIL WITH BKN TO OVC NORTH AND SCT TO BKN SOUTH. OUTLOOK... A COLD FRONT APPROACHING FROM THE NORTHWEST IS FORECAST TO TOUCH OFF SCATTERED TO SHOWERS AND THUNDERSTORMS SUNDAY INTO SUNDAY NIGHT. THE ACTIVITY COULD BE JUST ABOUT ANYTIME SUNDAY IN OUR NORTHERN AREAS, BUT SHOULD NOT REACH SOUTHERN SECTIONS UNTIL LATER IN THE DAY. THE FRONT IS EXPECTED TO CROSS OUR AREA SUNDAY NIGHT, DROPPING FURTHER SOUTH ON MONDAY. THIS WILL LIKELY SUPPRESS ANY CONVECTION TO OUR SOUTHERN SECTIONS, AND POSSIBLY PUSH IT EVEN FARTHER TO OUR SOUTH AND OUT OF OUR AREA FOR A PERIOD OF TIME. BUT FOR TUESDAY INTO WEDNESDAY THERE COULD BE A MORE PROLONGED RAIN AS A WARMFRONT MOVES OVER THE REGION. RESTRICTIONS TO CIGS AND VSBYS ARE LIKELY DURING THIS TIME PERIOD. && .MARINE... THE FRONT THAT DROPPED DOWN FROM THE NORTH THIS MORNING WAS JUST NORTH OF ATLANTIC CITY THIS AFTERNOON. AHEAD OF THE FRONT WINDS WERE FROM THE SOUTH AROUND 10 KT. BEHIND THE FRONT, EAST NORTHEAST 10 TO 15 KT. SATELLITE PICTURES ALSO SHOW A FOG BANK JUST OFFSHORE NORTH OF THE FRONT. DAYTIME HEATING IS KEEPING FOG FROM PROGRESSING INLAND. ONCE THE SUN SETS, THE FOG MAY PUSH INLAND OVER OCEAN AND MONMOUTH COUNTIES. COMPUTER MODELS CONTINUE TO INDICATE THAT THE FRONT WILL BEGIN TO PUSH BACK NORTH LATER TONIGHT. THIS WILL ONCE AGAIN SWING WINDS BACK AROUND TO A SOUTHERLY DIRECTION AND SHOULD PUSH THE FOG BANK BACK OFF THE COAST AND OUT TO SEA. WITH RELATIVELY LIGHT WINDS AND SMALL SEAS, THE HOLIDAY WEEKEND CONTINUES TO BE A GOOD ONE FOR THE BOATING COMMUNITY. THESE CONDITIONS SHOULD CONTINUE INTO SUNDAY. A COLD FRONT APPROACHING FROM THE NORTHWEST WILL BRING THE THREAT OF SHOWERS/TSTMS SUNDAY AFTERNOON INTO SUNDAY NIGHT. THE THREAT WILL BE INCREASING FROM NORTH TO SOUTH. SOUTHERN SECTIONS MAY NOT SEE ANY SHOWER/TSTM ACTIVITY UNTIL THE EVENING HOURS OR, POSSIBLY, SUNDAY NIGHT. THE FRONT IS EXPECTED TO DROP JUST TO OUR SOUTH ON MONDAY. THERE STILL COULD BE SOME SHOWERS/TSTMS FOR OUR FAR SOUTHERN AREAS, BUT MOST AREAS SHOULD BE PRECIPITATION FREE. THE FRONT IS THEN EXPECTED TO MOVE BACK ACROSS OUR WATERS AS A WARM FRONT LATE TUESDAY OR TUESDAY NIGHT, CAUSING WINDS TO BECOME SOUTHERLY ONCE AGAIN. A STRONG COLD FRONT IS THEN FORECAST TO CROSS OUR AREA THURSDAY NIGHT OR EARLY FRIDAY. WINDS AND/OR SEAS COULD REACH SMALL CRAFT ADVISORY CRITERIA LATE TUESDAY INTO THURSDAY NIGHT OR FRIDAY. && .PHI WATCHES/WARNINGS/ADVISORIES... PA...NONE. NJ...NONE. DE...NONE. MD...NONE. MARINE...NONE. && SYNOPSIS...GIGI NEAR TERM...GIGI SHORT TERM...GIGI LONG TERM...GIGI AVIATION...RPW MARINE...RPW
Hazardous weather outlook, May 23, 4:51 AM EDT, 11 hours 43 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 451 AM EDT SAT MAY 23 2009 DEZ001>003-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ054-055- 060>062-067>071-240900- NEW CASTLE-KENT-INLAND SUSSEX-CECIL-KENT MD-QUEEN ANNES-TALBOT- CAROLINE-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX- WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-SALEM-GLOUCESTER-CAMDEN- NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY- ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC-COASTAL OCEAN- SOUTHEASTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON- CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- 451 AM EDT SAT MAY 23 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL DELAWARE...NORTHERN DELAWARE...SOUTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL NEW JERSEY...NORTHERN NEW JERSEY...NORTHWEST NEW JERSEY...SOUTHERN NEW JERSEY...EAST CENTRAL PENNSYLVANIA...NORTHEAST PENNSYLVANIA AND SOUTHEAST PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ430-431-450>455-DEZ004-240900- DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- COASTAL WATERS FROM SANDY HOOK TO MANASQUAN INLET NJ OUT 20 NM- COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20 NM- COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20 NM- COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM- COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM- COASTAL WATERS FROM CAPE HENLOPEN TO FENWICK ISLAND DE OUT 20 NM- DELAWARE BEACHES- 451 AM EDT SAT MAY 23 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS...SOUTHERN DELAWARE AND DELAWARE BAY WATERS. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
In the hours before
Special weather statement, May 23, 2:29 PM EDT, 2 hours 5 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 229 PM EDT SAT MAY 23 2009 NJZ013-014-020-026-232230- WESTERN MONMOUTH-EASTERN MONMOUTH-OCEAN-COASTAL OCEAN- INCLUDING THE CITIES OF...FREEHOLD...SANDY HOOK...JACKSON... LONG BEACH ISLAND 229 PM EDT SAT MAY 23 2009 ...DENSE FOG BANK ON THE NORTHERN COASTAL WATERS OF NEW JERSEY... A DENSE FOG BANK REMAINED OVER THE NORTHERN COASTAL WATERS OF NEW JERSEY EARLY THIS EVENING. AT 620 PM, THE DENSE FOG WAS AFFECTING THE WATERS OFF THE COAST FROM AROUND SEASIDE HEIGHTS UP TO SANDY HOOK, AS WELL AS ADJACENT COASTAL COMMUNITIES. THE FOG BANK WILL CONTINUE TO DRIFT NORTHWARD DURING THE EVENING, WITH IMPROVING CONDITIONS WORKING THEIR WAY UP FROM THE SOUTH. THE FOG MAY REDUCE THE VISIBILITY TO NEAR ZERO AT TIMES. IOVINO
Special weather statement, May 23, 2:51 PM EDT, 1 hour 43 minutes before
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</html>Special weather statement, May 23, 2:59 PM EDT, 1 hour 35 minutes before
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</html>The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 4:40 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 37 min |
| May 23, 4:16 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 44 min |
Nearby
Areal Flood Advisories in Pennsylvania, 2009Every areal flood advisory in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.