Alert archive / New Jersey / Flash Flood Warnings in 2009
Flash Flood Warning 48, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 22, 2009, 3:36 AM EDT for Somerset 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
- Aug 22, 2009, 3:36 AM EDT (07:36 UTC)
- Expired
- Aug 22, 2009, 7:30 AM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 62 km from the middle of the area, began a volume at 07:39 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 00:00Z, 7.6 hours before the alert went out and 150 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
- 1483 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 764 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 6.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS51 KPHI 220736
FFWPHI
NJC035-221130-
/O.NEW.KPHI.FF.W.0048.090822T0736Z-090822T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
336 AM EDT SAT AUG 22 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...
* UNTIL 730 AM EDT
* AT 326 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT 2 TO 3 INCHES OF RAIN HAVE FALLEN ACROSS THE PIKE RUN
WATERSHED OVER THE LAST FEW HOURS. IN RESPONSE, THE RIVER GAGE IN
BELLE MEAD ON PIKE RUN IS SHOWING RAPID RISES AND IS EXPECTED TO
EXCEED FLOOD STAGE. FLASH FLOODING IS IMMINENT.
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.
&&
LAT...LON 4046 7449 4040 7462 4042 7470 4048 7473
4050 7464 4058 7458 4056 7452 4054 7453
4051 7448
$$
KRUZDLOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 1:28 AM EDT | Flash Flood Warning | PHI | Camden, Cumberland, Gloucester, Salem | 4 hr |
| Aug 22, 1:40 AM EDT | Areal Flood Advisory | PHI | Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Morris and 1 more | 3 hr |
| Aug 22, 4:26 AM EDT | Areal Flood Advisory | PHI | Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem | 6 hr |
| Aug 22, 5:42 AM EDT | Areal Flood Advisory | PHI | Camden, Cumberland, Gloucester, Salem | 3 hr |
| Aug 22, 9:01 AM EDT | Areal Flood Advisory | PHI | Atlantic, Cape May, Cumberland | 3 hr |
| Aug 22, 6:02 PM EDT | Flash Flood Warning | PHI | Mercer | 4 hr |
| Aug 22, 6:21 PM EDT | Flash Flood Warning | PHI | Hunterdon, Warren | 3 hr |
| Aug 22, 6:32 PM EDT | Flash Flood Warning | PHI | Camden, Gloucester | 3 hr |
| Aug 22, 7:32 PM EDT | River Flood Warning | PHI | Mercer | 19 hr |
Nearby
Flash Flood Warnings in New Jersey, 2009Every flash flood warning in 2009
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.