Alert archive / New Jersey / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 31, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 24, 2009, 7:06 PM EDT for Hunterdon County, Mercer County, Somerset County, New Jersey; Bucks County, Pennsylvania. It was in force for 54 min. 2 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
- May 24, 2009, 7:06 PM EDT (23:06 UTC)
- Expired
- May 24, 2009, 8:00 PM EDT
- In force
- 54 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Mercer County, NJ, Somerset County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 70 km from the middle of the area, began a volume at 23:06 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 |
|---|---|---|---|
| May 24, 7:10 PM EDT | TSTM WND DMG | 5 Nw Flemington, NJ | TREES DOWN IN FRANKLIN TOWNSHIP. |
| May 24, 7:15 PM EDT | TSTM WND DMG | Flemington, NJ | TREES DOWN IN RARITAN AND READINGTON TOWNSHIPS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 11.1 hours before the alert went out and 176 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 242306 SVRPHI NJC019-021-035-PAC017-250000- /O.NEW.KPHI.SV.W.0031.090524T2306Z-090525T0000Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 706 PM EDT SUN MAY 24 2009 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN MERCER COUNTY IN CENTRAL NEW JERSEY... SOUTHWESTERN SOMERSET COUNTY IN NORTHERN NEW JERSEY... HUNTERDON COUNTY IN NORTHWEST NEW JERSEY... CENTRAL BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA... * UNTIL 800 PM EDT * AT 705 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 FRENCHTOWN...AND MOVING SOUTHEAST AT 15 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... FLEMINGTON BY 730 PM EDT... SAND BROOK AND SERGEANTSVILLE BY 735 PM EDT... STOCKTON BY 740 PM EDT... NEW HOPE BY 755 PM EDT... HOPEWELL BY 800 PM EDT... LAT...LON 4040 7468 4028 7498 4057 7514 4066 7492 TIME...MOT...LOC 2306Z 329DEG 13KT 4056 7499 $$ 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, 7:56 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Somerset | 30 min |
| May 24, 2:15 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 45 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2009Severe Thunderstorm Warnings in Pennsylvania, 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.