Alert archive / Pennsylvania / Flash Flood Warnings in 2014
Flash Flood Warning 47, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 1, 2014, 6:38 PM EDT for 4 counties in Pennsylvania. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 1, 2014, 6:38 PM EDT (22:38 UTC)
- Expired
- Aug 1, 2014, 10:30 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Berks County, PA, Bucks County, PA, Lehigh County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 121 km from the middle of the area, began a volume at 22:41 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.
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.6 hours before the alert went out and 121 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
- 696 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 781 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
040 WGUS51 KPHI 012238 FFWPHI PAC011-017-077-091-020230- /O.NEW.KPHI.FF.W.0047.140801T2238Z-140802T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 638 PM EDT FRI AUG 1 2014 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEASTERN BERKS COUNTY IN EASTERN PENNSYLVANIA... SOUTHERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA... WEST CENTRAL BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA... NORTHWESTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA... * UNTIL 1030 PM EDT * AT 631 PM EDT...RAIN CONTINUES TO FALL OVER THE AREA AFTER HEAVY THUNDERSTORMS DUMPED TWO TO THREE INCHES OR MORE OVER THE PAST TWO HOURS. THIS RAINFALL IS EXPECTED TO CAUSE FLOODING OF SOME CREEKS AND STREAMS...IN PARTICULAR THE PERKIOMEN CREEK IN UPPER MONTGOMERY COUNTY. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO EMMAUS... ANCIENT OAKS...ZIONSVILLE...TOPTON...LYONS...KUTZTOWN AND CLAUSSVILLE 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 4056 7586 4068 7565 4043 7530 4027 7549 $$ AMC
1 follow-up statement
625 WGUS71 KPHI 020039 FFSPHI FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 839 PM EDT FRI AUG 1 2014 PAC011-017-077-091-020046- /O.CAN.KPHI.FF.W.0047.000000T0000Z-140802T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BERKS PA-BUCKS PA-LEHIGH PA-MONTGOMERY PA- 839 PM EDT FRI AUG 1 2014 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHWESTERN MONTGOMERY...SOUTHERN LEHIGH...WEST CENTRAL BUCKS AND NORTHEASTERN BERKS COUNTIES... THE STORMS WHICH PROMPTED THE WARNINGS HAVE NOW DISSIPATED. NO FLOODING HAS BEEN REPORTED TO THE NATIONAL WEATHER SERVICE ALTHOUGH THE PERKIOMEN CREEK AT EAST GREENVILLE IN UPPER MONTGOMERY COUNTY HAS RISEN ABOVE CAUTION STAGE. LAT...LON 4056 7586 4068 7565 4043 7530 4027 7549 $$ AMC
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 2:45 PM EDT | Special Weather Statement | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| Aug 1, 3:27 PM EDT | Areal Flood Advisory | PHI | Bucks | 3 hr |
| Aug 1, 4:34 PM EDT | Special Weather Statement | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 56 min |
| Aug 1, 5:10 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Lehigh, Montgomery | 110 min |
| Aug 1, 5:42 PM EDT | Special Weather Statement | PHI | Lehigh | 93 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2014Every flash flood warning in 2014
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.