Alert archive / New Jersey / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 32, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 24, 2009, 7:56 PM EDT for 4 counties in New Jersey. It was in force for 30 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
- May 24, 2009, 7:56 PM EDT (23:56 UTC)
- Expired
- May 24, 2009, 8:26 PM EDT
- In force
- 30 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 49 km from the middle of the area, began a volume at 23:58 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, 11.9 hours before the alert went out and 148 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
- 28 J/kg
- Mixed-layer CIN
- -132 J/kg
- Mixed-layer LCL
- 740 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 242356 SVRPHI NJC019-021-023-035-250045- /O.NEW.KPHI.SV.W.0032.090524T2356Z-090525T0045Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 756 PM EDT SUN MAY 24 2009 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN MERCER COUNTY IN CENTRAL NEW JERSEY... SOUTHERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY... THIS INCLUDES THE CITY OF NEW BRUNSWICK... SOUTHERN SOMERSET COUNTY IN NORTHERN NEW JERSEY... SOUTHEASTERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY... * UNTIL 845 PM EDT * AT 754 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR ROCKY HILL...AND MOVING SOUTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... ROCKY HILL AND PRINCETON BY 800 PM EDT... KENDALL PARK BY 805 PM EDT... SOUTH BRUNSWICK BY 810 PM EDT... DAYTON BY 815 PM EDT... CLEARBROOK PARK AND JAMESBURG BY 825 PM EDT... TWIN RIVERS BY 830 PM EDT... LAT...LON 4039 7427 4018 7459 4041 7480 4055 7457 TIME...MOT...LOC 2355Z 310DEG 19KT 4043 7463 $$ IOVINO
1 follow-up statement
000 WWUS51 KPHI 250026 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 826 PM EDT SUN MAY 24 2009 NJC019-021-023-035-250036- /O.CAN.KPHI.SV.W.0032.000000T0000Z-090525T0045Z/ HUNTERDON NJ-SOMERSET NJ-MERCER NJ-MIDDLESEX NJ- 826 PM EDT SUN MAY 24 2009 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN MIDDLESEX...EASTERN MERCER...SOUTHERN SOMERSET AND SOUTHEASTERN HUNTERDON COUNTIES IS CANCELLED... THE THUNDERSTORM HAS WEAKENED. LAT...LON 4039 7427 4018 7459 4041 7480 4055 7457 TIME...MOT...LOC 0026Z 310DEG 19KT 4032 7446 $$ IOVINO
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 2:26 PM EDT | Areal Flood Advisory | PHI | Sussex, Warren | 107 min |
| May 24, 5:16 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 59 min |
| May 24, 7:06 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Somerset | 54 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 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.