Alert archive / Pennsylvania / Flash Flood Warnings in 2004
Flash Flood Warning 87, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 18, 2004, 9:48 AM EDT for 4 counties in Pennsylvania; Sussex County, Warren County, New Jersey. 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
- Sep 18, 2004, 9:48 AM EDT (13:48 UTC)
- Expired
- Sep 18, 2004, 1:45 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
Counties Sussex County, NJ, Warren County, NJ, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 141 km from the middle of the area, began a volume at 13:51 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
Brookhaven, NY (KOKX), launched 12:00Z, 1.8 hours before the alert went out and 199 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
- 1385 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 550 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 226 m²/s²
- 0-3 km storm-relative helicity
- 206 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 5.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS51 KPHI 181358
FFWPHI
NJC037-041-PAC025-077-089-095-181745-
/X.NEW.KPHI.FF.W.0007.040918T1348Z-040918T1745Z/
/0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
948 AM EDT SAT SEP 18 2004
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS CONTINUED A
* FLASH FLOOD WARNING FOR...
LEHIGH COUNTY IN EASTERN PENNSYLVANIA
NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA
CARBON COUNTY IN NORTHEAST PENNSYLVANIA
MONROE COUNTY IN NORTHEAST PENNSYLVANIA
SUSSEX COUNTY IN NORTHWEST NEW JERSEY
WARREN COUNTY IN NORTHWEST NEW JERSEY
* UNTIL 145 PM EDT
* AT 947 AM EDT...WIDESPREAD FLOODING HAS BEEN REPORTED THROUGHOUT
THE POCONO MOUNTAIN AREA AND THE LEHIGH VALLEY, AS WELL AS IN
NORTHWESTERN NEW JERSEY. DOPPLER RADAR CONTINUES TO SHOW RAIN
THROUGHOUT THE REGION THIS MORNING. IN ADDITION...THE EXTREMELY
WET SOILS COMBINED WITH WINDS 20 TO 30 MPH ARE BRINGING DOWN TREES
ACROSS THE AREA. EMERGENCY MANAGEMENT PERSONNEL REQUEST RESIDENTS
TO STAY OFF THE ROADS IF AT ALL POSSIBLE.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO POCONO
PINES...MOUNTAINHOME...MOUNT POCONO...EAST STROUDSBURG...
BRODHEADSVILLE...NEWTON...CRANDON LAKES...BRANCHVILLE...BLAIRSTOWN
AND ANDOVER.
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 4098 7474 4048 7554 4072 7577 4074 7576
4090 7595 4104 7555 4113 7564 4123 7555
4125 7514 4116 7517 4115 7510 4108 7502
4112 7493 4127 7483 4130 7471 4130 7471
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 3:29 AM EDT | Severe Thunderstorm Warning | PHI | Chester | 31 min |
| Sep 18, 6:09 AM EDT | Flash Flood Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 4 hr |
| Sep 18, 7:07 AM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 4 hr |
| Sep 18, 10:31 AM EDT | Flash Flood Warning | PHI | Chester, Delaware | 3 hr |
| Sep 18, 10:57 AM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 3 hr |
| Sep 18, 1:45 PM EDT | Flash Flood Warning | PHI | Bucks, Chester, Delaware, Montgomery | 2 hr |
| Sep 18, 2:00 PM EDT | Flash Flood Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 3 hr |
| Sep 18, 6:22 AM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 38 min |
| Sep 18, 6:46 AM EDT | Flash Flood Warning | PHI | Sussex | 3 hr |
| Sep 18, 7:04 AM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 86 min |
| Sep 18, 7:37 AM EDT | Flash Flood Warning | PHI | Morris | 4 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 2004Flash Flood Warnings in New Jersey, 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; radar from the NEXRAD Level II archive.