Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 30, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 24, 2009, 5:16 PM EDT for Warren County, New Jersey; Monroe County, Northampton County, Pennsylvania. It was in force for 59 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, 5:16 PM EDT (21:16 UTC)
- Expired
- May 24, 2009, 6:15 PM EDT
- In force
- 59 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Warren County, NJ, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 119 km from the middle of the area, began a volume at 21:18 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, 5:50 PM EDT | TSTM WND DMG | Belvidere, NJ | TREES AND WIRES DOWN. |
| May 24, 6:10 PM EDT | TSTM WND DMG | Washington, NJ | TREES AND WIRES DOWN. |
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, 9.3 hours before the alert went out and 180 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 242116 SVRPHI NJC041-PAC089-095-242215- /O.NEW.KPHI.SV.W.0030.090524T2116Z-090524T2215Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 516 PM EDT SUN MAY 24 2009 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA... EAST CENTRAL MONROE COUNTY IN NORTHEAST PENNSYLVANIA... WARREN COUNTY IN NORTHWEST NEW JERSEY... * UNTIL 615 PM EDT * AT 515 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 DELAWARE WATER GAP...AND MOVING SOUTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... COLUMBIA BY 530 PM EDT... BLAIRSTOWN BY 540 PM EDT... BELVIDERE BY 545 PM EDT... HOPE BY 550 PM EDT... OXFORD BY 600 PM EDT... GREAT MEADOWS...GREAT MEADOWS-VIENNA AND ALLAMUCHY-PANTHER VALLEY BY 605 PM EDT... LAT...LON 4091 7478 4070 7502 4094 7531 4111 7513 TIME...MOT...LOC 2116Z 307DEG 16KT 4098 7515 $$ IOVINO
1 follow-up statement
000 WWUS51 KPHI 242142 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 542 PM EDT SUN MAY 24 2009 NJC041-PAC089-095-242215- /O.CON.KPHI.SV.W.0030.000000T0000Z-090524T2215Z/ WARREN NJ-NORTHAMPTON PA-MONROE PA- 542 PM EDT SUN MAY 24 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT FOR SOUTH CENTRAL MONROE...NORTHEASTERN NORTHAMPTON AND CENTRAL WARREN COUNTIES... AT 541 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR PORTLAND...MOVING SOUTHEAST AT 20 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... BELVIDERE BY 550 PM EDT... HOPE AND ROXBURG BY 555 PM EDT... OXFORD AND BRASS CASTLE BY 605 PM EDT... GREAT MEADOWS AND WASHINGTON BY 610 PM EDT... LAT...LON 4091 7478 4070 7502 4094 7531 4101 7496 TIME...MOT...LOC 2142Z 307DEG 16KT 4090 7506 $$ 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, 7:06 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Somerset | 54 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 Pennsylvania, 2009Severe 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.