Alert archive / New Jersey / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 130, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 24, 2009, 6:28 PM EDT for 4 states. It was in force for 62 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 24, 2009, 6:28 PM EDT (22:28 UTC)
- Expired
- Jul 24, 2009, 7:30 PM EDT
- In force
- 62 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties New Castle County, DE, Cecil County, MD, Gloucester County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA
The radar
The Dover AFB radar (KDOX), 102 km from the middle of the area, began a volume at 22:28 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 24, 6:30 PM EDT | HAIL 0.75 | 2 Ese Richardsmere, MD | PENNY SIZE HAIL REPORTED IN COLORA. |
| Jul 24, 6:40 PM EDT | HAIL 1 | 5 N Wilmington Manor, DE | OBSERVED IN HOKESEN |
| Jul 24, 7:15 PM EDT | HAIL 0.88 | Brookhaven, PA | NICKEL SIZE HAIL REPORTED IN BROOKHAVEN AND UPLAND. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.5 hours before the alert went out and 50 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
- 29 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 540 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 242228
SVRPHI
DEC003-MDC015-NJC015-033-PAC029-045-242330-
/O.NEW.KPHI.SV.W.0130.090724T2228Z-090724T2330Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
628 PM EDT FRI JUL 24 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN CECIL COUNTY IN NORTHEAST MARYLAND...
NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
THIS INCLUDES THE CITIES OF...WILMINGTON...NEWARK...
SOUTHERN CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
THIS INCLUDES THE CITY OF WEST CHESTER...
DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
NORTHWESTERN GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
NORTHWESTERN SALEM COUNTY IN SOUTHERN NEW JERSEY...
* UNTIL 730 PM EDT
* AT 626 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
KENNETT SQUARE...OR 8 MILES SOUTHWEST OF WEST CHESTER...AND MOVING
EAST AT 25 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
ASHLAND AROUND 635 PM EDT...
ELAM AND WESTTOWN AROUND 645 PM EDT...
ELAM...CONCORDVILLE...TALLEYVILLE AND CHEYNEY AROUND 650 PM EDT...
CHELSEA AROUND 655 PM EDT...
LIMA AROUND 700 PM EDT...
CHESTER AROUND 710 PM EDT...
LAT...LON 4003 7580 3994 7526 3958 7547 3959 7558
3963 7557 3967 7552 3969 7552 3964 7559
3960 7560 3965 7616
TIME...MOT...LOC 2227Z 277DEG 21KT 3988 7570
$$
SZATKOWSKIThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 6:46 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 74 min |
| Jul 24, 6:44 PM EDT | Special Marine Warning | PHI | 61 min | |
| Jul 24, 7:11 PM EDT | Severe Thunderstorm Warning | PHI | Camden, Gloucester, Salem | 46 min |
| Jul 24, 7:37 PM EDT | Special Marine Warning | PHI | 83 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2009Severe Thunderstorm Warnings in Pennsylvania, 2009Severe Thunderstorm Warnings in Maryland, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.