Alert archive / Pennsylvania / Flash Flood Warnings in 2011
Flash Flood Warning 3, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at May 19, 2011, 4:39 PM EDT for Bucks County, Monroe County, Northampton County, Pennsylvania; Hunterdon County, Warren County, New Jersey. It was in force for 4 hr. 3 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 19, 2011, 4:39 PM EDT (20:39 UTC)
- Expired
- May 19, 2011, 8:47 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hunterdon County, NJ, Warren County, NJ, Bucks County, PA, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 115 km from the middle of the area, began a volume at 20:42 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 19, 5:02 PM EDT | FLASH FLOOD | Plainfield Twp, PA | PA 115 CLOSED DUE TO FLOODING |
| May 19, 5:20 PM EDT | FLASH FLOOD | Stroud Twp, PA | WIDESPREAD ROADWAY FLOODING ALONG AND AROUND U.S. 209 AND PA 33. |
| May 19, 5:54 PM EDT | FLASH FLOOD | Washington Twp, PA | BRIDGE WASHED OUT DUE TO FLOODING AT CEDAR RD AND RICHMOND RD |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.7 hours before the alert went out and 167 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
- 143 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 819 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
204 WGUS51 KPHI 192039 FFWPHI NJC019-041-PAC017-089-095-200245- /O.NEW.KPHI.FF.W.0003.110519T2039Z-110520T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 439 PM EDT THU MAY 19 2011 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * FLASH FLOOD WARNING FOR... EASTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA... THIS INCLUDES THE CITY OF EASTON... SOUTH CENTRAL MONROE COUNTY IN NORTHEAST PENNSYLVANIA... NORTHWESTERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY... WESTERN WARREN COUNTY IN NORTHWEST NEW JERSEY... NORTH CENTRAL BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA... * UNTIL 1045 PM EDT * AT 431 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED OVER AN INCH OF RAIN HAS FALLEN WITHIN THE LAST HOUR WITH ADDITIONAL RAINFALL MOVING INTO THE AREA CAPABLE OF PRODUCING ADDITIONAL ONE TO TWO INCHES. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NAZARETH... TATAMY...STORMVILLE...SAYLORSBURG...ROXBURG...PLEASANT VALLEY... HOPE...HARMONY...COLUMBIA...WIND GAP...PEN ARGYL...EAST BANGOR... DELAWARE WATER GAP...BELFAST...BANGOR...WASHINGTON...OXFORD...BRASS CASTLE...BLAIRSTOWN AND BELVIDERE PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. && LAT...LON 4098 7536 4100 7495 4051 7490 4051 7533 $$ ROBERTSON
2 follow-up statements
239 WGUS71 KPHI 192146 FFSPHI FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 546 PM EDT THU MAY 19 2011 NJC019-041-PAC017-089-095-200245- /O.CON.KPHI.FF.W.0003.000000T0000Z-110520T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WARREN NJ-HUNTERDON NJ-NORTHAMPTON PA-BUCKS PA-MONROE PA- 546 PM EDT THU MAY 19 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT FOR SOUTH CENTRAL MONROE...NORTH CENTRAL BUCKS...EASTERN NORTHAMPTON... NORTHWESTERN HUNTERDON AND WESTERN WARREN COUNTIES... AT 527 PM EDT...TRAINED WEATHER SPOTTERS REPORTED ROADWAY FLOODING IN STROUD TOWNSHIP NEAR THE INTERSECTION OF US ROUTE 209 AND PENNSYLVANIA ROUTE 33. ONE TO THREE INCHES OF RAINFALL HAS FALLEN ACROSS THE AREA THIS AFTERNOON. ADDITIONAL SHOWERS AND THUNDERSTORMS ARE CAPABLE OF PRODUCING ANOTHER INCH OF RAIN THIS EVENING WHICH WILL LIKELY LEAD TO MORE FLOODING ACROSS THE WARNED AREA. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PLEASANT VALLEY...STORMVILLE...SAYLORSBURG...ROXBURG...HOPE...COLUMBIA...WIND GAP...PEN ARGYL...EAST BANGOR...DELAWARE WATER GAP...BELFAST... BANGOR...WASHINGTON...OXFORD...BRASS CASTLE...BLAIRSTOWN AND BELVIDERE PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT THURSDAY EVENING FOR NEW JERSEY AND EASTERN PENNSYLVANIA. && LAT...LON 4098 7536 4100 7495 4051 7490 4051 7533 $$ ROBERTSON
816 WGUS71 KPHI 200047 FFSPHI FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 847 PM EDT THU MAY 19 2011 NJC019-041-PAC017-089-095-200055- /O.CAN.KPHI.FF.W.0003.000000T0000Z-110520T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WARREN NJ-HUNTERDON NJ-NORTHAMPTON PA-BUCKS PA-MONROE PA- 847 PM EDT THU MAY 19 2011 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTH CENTRAL MONROE...NORTH CENTRAL BUCKS...EASTERN NORTHAMPTON...NORTHWESTERN HUNTERDON AND WESTERN WARREN COUNTIES... THE HEAVY RAINFALL THAT PROMPTED THE WARNING HAS ENDED ACROSS THE AREA AND ANY REMAINING HIGH WATER SHOULD CONTINUE TO RECEDE THIS EVENING. ADDITIONAL SHOWERS AND ISOLATED THUNDERSTORMS ARE POSSIBLE THIS EVENING AND OVERNIGHT. LAT...LON 4098 7536 4100 7495 4051 7490 4051 7533 $$ ROBERTSON
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 12:31 PM EDT | Special Weather Statement | PHI | Berks | 89 min |
| May 19, 1:26 PM EDT | Areal Flood Advisory | PHI | Berks | 5 hr |
| May 19, 1:29 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 61 min |
| May 19, 2:22 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 41 min |
| May 19, 2:54 PM EDT | Areal Flood Advisory | PHI | Berks, Carbon, Lehigh, Northampton | 3 hr |
| May 19, 3:00 PM EDT | Special Weather Statement | PHI | Carbon | 60 min |
| May 19, 3:01 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| May 19, 3:05 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 55 min |
| May 19, 3:12 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 63 min |
| May 19, 3:15 PM EDT | Special Weather Statement | PHI | Chester, Delaware, Montgomery, Philadelphia | 60 min |
| May 19, 3:37 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 53 min |
| May 19, 3:40 PM EDT | Areal Flood Advisory | PHI | Bucks, Lehigh, Monroe, Northampton | 5 hr |
| May 19, 3:52 PM EDT | Coastal Flood Statement | PHI | Delaware, Philadelphia | 8 hr |
| May 19, 4:06 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 54 min |
| May 19, 4:18 PM EDT | Special Weather Statement | PHI | Monroe | 57 min |
| May 19, 4:20 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 55 min |
| May 19, 4:28 PM EDT | Special Weather Statement | PHI | Bucks | 62 min |
| May 19, 4:31 PM EDT | Special Weather Statement | PHI | Bucks | 59 min |
| May 19, 4:50 PM EDT | Special Weather Statement | PHI | Monroe | 55 min |
| May 19, 5:08 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 50 min |
| May 19, 7:23 PM EDT | Areal Flood Warning | PHI | Montgomery, Philadelphia | 82 min |
| May 19, 7:50 PM EDT | Special Weather Statement | PHI | Philadelphia | 55 min |
| May 18, 8:29 PM EDT | Areal Flood Warning | PHI | Morris | 4 days |
| May 19, 3:35 AM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 4 days |
| May 19, 10:26 AM EDT | River Flood Warning | PHI | Essex, Passaic | 65 hr |
| May 19, 10:28 AM EDT | River Flood Warning | PHI | Passaic | 11 hr |
| May 19, 2:19 PM EDT | Special Weather Statement | PHI | Camden, Cumberland, Gloucester, Salem | 56 min |
| May 19, 2:34 PM EDT | Special Weather Statement | PHI | Warren | 56 min |
| May 19, 3:23 PM EDT | Special Weather Statement | PHI | Hunterdon | 67 min |
| May 19, 3:34 PM EDT | Small Craft Advisory for Hazardous Seas | PHI | 12 hr | |
| May 19, 4:02 PM EDT | Special Weather Statement | PHI | Camden, Gloucester | 58 min |
| May 19, 5:21 PM EDT | Special Weather Statement | PHI | Burlington | 54 min |
| May 19, 5:43 PM EDT | Special Marine Warning | PHI | 62 min | |
| May 19, 5:58 PM EDT | Special Weather Statement | PHI | Sussex | 47 min |
| May 19, 6:08 PM EDT | Special Weather Statement | PHI | Cumberland, Salem | 52 min |
| May 19, 7:34 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Camden, Cumberland, Gloucester | 56 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2011Flash Flood Warnings in New Jersey, 2011Every flash flood warning in 2011
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.