Alert archive / New Jersey / Flash Flood Warnings in 2009
Flash Flood Warning 66, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Oct 24, 2009, 7:16 PM EDT for Hunterdon County, Morris County, Somerset County, New Jersey. It was in force for 3 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
- Oct 24, 2009, 7:16 PM EDT (23:16 UTC)
- Expired
- Oct 24, 2009, 10:15 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 101 km from the middle of the area, began a volume at 23:16 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, 11.3 hours before the alert went out and 129 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
- 74 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 485 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 282 m²/s²
- 0-3 km storm-relative helicity
- 325 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS51 KPHI 242316
FFWPHI
NJC019-027-035-250215-
/O.NEW.KPHI.FF.W.0066.091024T2316Z-091025T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
716 PM EDT SAT OCT 24 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
MORRIS COUNTY IN NORTHERN NEW JERSEY...
THIS INCLUDES THE CITY OF MORRISTOWN...
NORTHWESTERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...
NORTHEASTERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
* UNTIL 1015 PM EDT
* AT 715 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ROCKAWAY...
PARSIPPANY...MOUNTAIN LAKES...MORRIS PLAINS...MENDHAM...LINCOLN
PARK...KINNELON...EAST HANOVER...DOVER...CHESTER AND BOONTON
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.
&&
LAT...LON 4090 7429 4089 7433 4087 7433 4086 7431
4081 7433 4063 7468 4070 7488 4100 7436
4091 7426 4089 7427
$$
RNSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 24, 4:49 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Somerset, Sussex, Warren | 4 hr |
| Oct 24, 6:19 PM EDT | Severe Thunderstorm Warning | PHI | Salem | 26 min |
| Oct 24, 6:28 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Somerset | 47 min |
| Oct 24, 6:31 PM EDT | Tornado Warning | PHI | Hunterdon | 10 min |
| Oct 24, 7:24 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Middlesex, Monmouth, Ocean and 1 more | 3 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.