Alert archive / Pennsylvania / Flash Flood Warnings in 2012
Flash Flood Warning 4, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at May 26, 2012, 3:32 PM EDT for Monroe County, Northampton County, Pennsylvania. It was in force for 4 hr. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 26, 2012, 3:32 PM EDT (19:32 UTC)
- Expired
- May 26, 2012, 7:30 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 127 km from the middle of the area, began a volume at 19:35 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 26, 3:38 PM EDT | FLASH FLOOD | Hamilton Twp, PA | MULTIPLE ROADS FLOODED AND TREES DOWN. MUDSLIDE. |
| May 26, 3:55 PM EDT | FLASH FLOOD | Hamilton Twp, PA | NUMEROUS REPORTS OF FLASH FLOODING. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 7.5 hours before the alert went out and 202 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 144 J/kg
- Mixed-layer CIN
- -138 J/kg
- Mixed-layer LCL
- 659 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
616 WGUS51 KPHI 261932 FFWPHI PAC089-095-262330- /O.NEW.KPHI.FF.W.0004.120526T1932Z-120526T2330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 332 PM EDT SAT MAY 26 2012 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTH CENTRAL NORTHAMPTON COUNTY... SOUTH CENTRAL MONROE COUNTY... * UNTIL 730 PM EDT... * AT 326 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM OVER NORTH CENTRAL NORTHAMPTON AND SOUTH CENTRAL MONROE COUNTIES. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SAYLORSBURG...BANGOR...PEN ARGYL AND WIND GAP. TWO TO THREE INCHES OF RAIN HAS FALLEN ACROSS THE AREA OVER THE LAST HOUR. ADDITIONAL RAINFALL AMOUNTS OF AN INCH OR MORE ARE POSSIBLE IN THE WARNED AREA. PRECAUTIONARY/PREPAREDNESS ACTIONS... PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772. IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY. && LAT...LON 4085 7519 4081 7526 4093 7540 4097 7532 $$ ROBERTSON
3 follow-up statements
840 WGUS71 KPHI 262117 FFSPHI FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 517 PM EDT SAT MAY 26 2012 PAC089-095-262330- /O.CON.KPHI.FF.W.0004.000000T0000Z-120526T2330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NORTHAMPTON PA-MONROE PA- 517 PM EDT SAT MAY 26 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR SOUTH CENTRAL MONROE AND NORTH CENTRAL NORTHAMPTON COUNTIES... AT 509 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED WIDESPREAD FLOODING AND ROAD CLOSURES OVER SOUTH CENTRAL MONROE AND NORTH CENTRAL NORTHAMPTON COUNTIES... LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SAYLORSBURG...HAMILTON...BANGOR...PEN ARGYL... AND WIND GAP. ADDITIONAL RAINFALL AMOUNTS OF ONE INCH OR MORE ARE POSSIBLE IN THE WARNED AREA. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY. PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE BY CALLING YOUR LOCAL LAW ENFORCEMENT OFFICIALS OR BY CALLING THE NATIONAL WEATHER SERVICE TOLL FREE AT...1-877-633-6772. && LAT...LON 4085 7519 4081 7526 4093 7540 4097 7532 $$ ROBERTSON
429 WGUS71 KPHI 262249 FFSPHI FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 649 PM EDT SAT MAY 26 2012 PAC089-095-262330- /O.CON.KPHI.FF.W.0004.000000T0000Z-120526T2330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NORTHAMPTON PA-MONROE PA- 649 PM EDT SAT MAY 26 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR SOUTH CENTRAL MONROE AND NORTH CENTRAL NORTHAMPTON COUNTIES... AT 639 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED ROUTE 33 HAS REOPENED...HOWEVER...THERE MAY STILL BE SMALLER ROADS THAT MAY BE CLOSED OR HAVE WATER COVERING THEM WHILE THE HEAVIEST RAIN HAS ENDED...THERE MAY BE ADDITIONAL RAINFALL LATER THIS EVENING. SMALLER CREEKS AND STREAMS CONTINUE TO RISE...ALTHOUGH NONE HAVE REPORTEDLY OVERFLOWED THEIR BANKS TO OUR KNOWLEDGE. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY. PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE BY CALLING YOUR LOCAL LAW ENFORCEMENT OFFICIALS OR BY CALLING THE NATIONAL WEATHER SERVICE TOLL FREE AT...1-877-633-6772. && LAT...LON 4085 7519 4081 7526 4093 7540 4097 7532 $$ ROBERTSON
230 WGUS71 KPHI 262324 FFSPHI FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 724 PM EDT SAT MAY 26 2012 PAC089-095-262332- /O.EXP.KPHI.FF.W.0004.000000T0000Z-120526T2330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NORTHAMPTON PA-MONROE PA- 724 PM EDT SAT MAY 26 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 730 PM EDT FOR SOUTH CENTRAL MONROE AND NORTH CENTRAL NORTHAMPTON COUNTIES... THE HEAVIEST RAIN HAS ENDED FOR THIS EVENING. SOME SMALLER CREEKS AND STREAMS MAY CONTINUE TO RISE...BUT SHOULD BEGIN RECEEDING OVER THE NEXT COUPLE OF HOURS. MORE HEAVY RAINFALL IS POSSIBLE ON SUNDAY WHICH COULD CAUSE ADDITIONAL FLOODING. LAT...LON 4085 7519 4081 7526 4093 7540 4097 7532 $$ ROBERTSON
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 2:02 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 58 min |
| May 26, 2:18 PM EDT | Areal Flood Advisory | PHI | Monroe, Northampton | 5 hr |
| May 26, 2:23 PM EDT | Areal Flood Advisory | PHI | Carbon | 3 hr |
| May 26, 2:36 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 5 hr |
| May 26, 2:42 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 48 min |
| May 26, 2:46 PM EDT | Special Weather Statement | PHI | Carbon | 44 min |
| May 26, 3:15 PM EDT | Areal Flood Advisory | PHI | Carbon | 2 hr |
| May 26, 3:39 PM EDT | Special Weather Statement | PHI | Monroe | 51 min |
| May 26, 3:40 PM EDT | Excessive Heat Watch | PHI | Delaware, Philadelphia | 23 hr |
| May 26, 3:45 PM EDT | Areal Flood Advisory | PHI | Carbon | 3 hr |
| May 26, 3:48 PM EDT | Areal Flood Advisory | PHI | Monroe | 3 hr |
| May 26, 3:51 PM EDT | Special Weather Statement | PHI | Carbon | 39 min |
| May 26, 3:54 PM EDT | Flash Flood Warning | PHI | Carbon | 4 hr |
| May 26, 4:31 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe, Northampton | 3 hr |
| May 26, 4:37 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 38 min |
| May 26, 4:54 PM EDT | Special Weather Statement | PHI | Northampton | 51 min |
| May 26, 5:26 PM EDT | Special Weather Statement | PHI | Bucks | 49 min |
| May 26, 5:33 PM EDT | Flash Flood Warning | PHI | Monroe | 114 min |
| May 26, 5:36 PM EDT | Areal Flood Advisory | PHI | Lehigh, Northampton | 114 min |
| May 26, 6:02 PM EDT | Special Weather Statement | PHI | Berks | 43 min |
| May 26, 6:10 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Montgomery | 111 min |
| May 26, 6:26 PM EDT | Special Weather Statement | PHI | Berks | 49 min |
| May 26, 7:18 PM EDT | Areal Flood Advisory | PHI | Bucks | 60 min |
| May 26, 7:20 PM EDT | Areal Flood Advisory | PHI | Berks, Chester | 59 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2012Every flash flood warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.