Alert archive / Pennsylvania / Flash Flood Warnings in 2004
Flash Flood Warning 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at May 15, 2004, 8:39 PM EDT for Berks County, Lehigh County, Northampton County, Pennsylvania. It was in force for 116 days. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 15, 2004, 8:39 PM EDT (00:39 UTC)
- Expired
- Sep 8, 2004, 9:30 PM EDT
- In force
- 116 days
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
Counties Berks County, PA, Lehigh County, PA, Northampton County, PA
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 0.7 hours before the alert went out and 229 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
- 174 J/kg
- Mixed-layer CIN
- -157 J/kg
- Mixed-layer LCL
- 1370 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 92 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS51 KPHI 160038 FFWPHI PAC011-077-160230- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 839 PM EDT SAT MAY 15 2004 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * FLASH FLOOD WARNING FOR... EAST CENTRAL BERKS COUNTY IN EASTERN PENNSYLVANIA SOUTHEASTERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA * UNTIL 1030 PM EDT. * AT 829 PM EDT...WEATHER SERVICE RADAR INDICATED BETWEEN 2 AND 3 INCHES OF RAIN HAS FALLEN OVER PARTS OF SOUTHEAST LEHIGH COUNTY AND EXTREME EASTERN BERKS COUNTY. HEAVIEST RAINFALL IS INDICATED ALONG PORTIONS OF THE LITTLE LEHIGH CREEK. ADDITIONAL RAIN IS LIKELY OVER THE AREA DURING THE NEXT HOUR OR TWO. DO NOT ATTEMPT TO DRIVE ACROSS FLOODED ROADWAYS. THE DEPTH OF THE WATER IS ESPECIALLY DIFFICULT TO JUDGE AT NIGHT. FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE TELEVISION OUTLET. LAT...LON 4060 7545 4053 7537 4037 7571 4051 7576 $$ AMC
1 follow-up statement
000 WGUS51 KPHI 082230 FFWPHI PAC095-090130- /X.NEW.KPHI.FF.W.0001.040908T2228Z-040909T0130Z/ /0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 628 PM EDT WED SEP 8 2004 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS UPGRADED THE URBAN AND SMALL STREAM FLOOD ADVISORY TO A * FLASH FLOOD WARNING FOR... CENTRAL NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA * UNTIL 930 PM EDT * AT 626 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED MANY STRANDED VEHICLES IN NORTHAMPTON COUNTY. WHILE THE BACK EDGE OF THE PRECIPITATION WAS NOW ENTERING NORTHAMPTON COUNTY... AN ADDITIONAL ONE TO TWO INCHES OF RAIN SHOULD FALL. THIS WILL EXACERBATE THE ONGOING POOR DRAINAGE FLOODING AND PUSH MANY STREAMS OVER THEIR BANKS. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NAZARETH... BELFAST AND BATH. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. LAT...LON 4063 7544 4063 7521 4081 7521 4081 7544 $$ TFG
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 8:32 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 43 min |
| May 15, 8:35 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 40 min |
| May 15, 10:56 PM EDT | Special Marine Warning | PHI | 109 min | |
| May 15, 11:19 PM EDT | Special Marine Warning | PHI | 86 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2004Every flash flood warning in 2004
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.