Alert archive / New Jersey / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 233, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Oct 24, 2009, 6:19 PM EDT for Salem County, New Jersey; New Castle County, Delaware. It was in force for 26 min. 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, 6:19 PM EDT (22:19 UTC)
- Expired
- Oct 24, 2009, 6:45 PM EDT
- In force
- 26 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties New Castle County, DE, Salem County, NJ
The radar
The Dover AFB radar (KDOX), 84 km from the middle of the area, began a volume at 22:21 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.3 hours before the alert went out and 174 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
- 288 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 586 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 309 m²/s²
- 0-3 km storm-relative helicity
- 369 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 242219
SVRPHI
DEC003-NJC033-242245-
/O.NEW.KPHI.SV.W.0233.091024T2219Z-091024T2245Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
619 PM EDT SAT OCT 24 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL NEW CASTLE COUNTY IN NORTHERN DELAWARE...
WESTERN SALEM COUNTY IN SOUTHERN NEW JERSEY...
* UNTIL 645 PM EDT
* AT 618 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM. THIS STORM WAS LOCATED 7 MILES SOUTHWEST OF
PORT PENN...OR NEAR MIDDLETOWN...AND MOVING NORTHEAST AT 40 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
PORT PENN AND DELAWARE CITY AROUND 630 PM EDT...
SALEM AROUND 635 PM EDT...
PENNSVILLE AROUND 640 PM EDT...
6 MILES SOUTHEAST OF CARNEYS POINT AND 6 MILES NORTHWEST OF ALLOWAY
AROUND 645 PM EDT...
LAT...LON 3962 7563 3965 7559 3959 7559 3966 7555
3965 7558 3968 7554 3966 7553 3970 7551
3975 7543 3958 7529 3944 7551 3946 7555
3950 7557 3958 7554 3958 7556 3946 7558
3943 7554 3934 7569
TIME...MOT...LOC 2219Z 229DEG 36KT 3947 7567
$$
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, 6:28 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Somerset | 47 min |
| Oct 24, 6:31 PM EDT | Tornado Warning | PHI | Hunterdon | 10 min |
| Oct 24, 7:16 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Somerset | 3 hr |
| Oct 24, 7:24 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Middlesex, Monmouth, Ocean and 1 more | 3 hr |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2009Severe Thunderstorm Warnings in Delaware, 2009Every severe thunderstorm 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.