Alert archive / New Jersey / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 141, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 26, 2009, 7:40 PM EDT for 4 counties in New Jersey. It was in force for 65 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 26, 2009, 7:40 PM EDT (23:40 UTC)
- Expired
- Jul 26, 2009, 8:45 PM EDT
- In force
- 65 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Burlington County, NJ, Mercer County, NJ, Monmouth County, NJ, Ocean County, NJ
The radar
The Philadelphia radar (KDIX), 27 km from the middle of the area, began a volume at 23:41 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 26, 7:45 PM EDT | HAIL 0.25 | 2 Nne Lumberton, NJ | PEA SIZE HAIL IN WESTAMPTON TWP. |
| Jul 26, 8:00 PM EDT | TSTM WND DMG | 4 S Bordentown, NJ | NUMEROUS TREES AND WIRES DOWN IN MANSFIELD TOWNSHIP. |
| Jul 26, 8:10 PM EDT | TSTM WND DMG | Bordentown, NJ | NUMEROUS TREES AND WIRES DOWN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 26, 3:51 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 11.7 hours before the alert went out and 169 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
- 933 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 889 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 161 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 262340 SVRPHI NJC005-021-025-029-270045- /O.NEW.KPHI.SV.W.0141.090726T2340Z-090727T0045Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 740 PM EDT SUN JUL 26 2009 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN MERCER COUNTY IN CENTRAL NEW JERSEY... SOUTHWESTERN MONMOUTH COUNTY IN CENTRAL NEW JERSEY... NORTH CENTRAL BURLINGTON COUNTY IN SOUTHERN NEW JERSEY... NORTHWESTERN OCEAN COUNTY IN SOUTHERN NEW JERSEY... * UNTIL 845 PM EDT * AT 737 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 JOBSTOWN...OR 14 MILES SOUTHEAST OF TRENTON...AND MOVING NORTHEAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... GEORGETOWN AROUND 745 PM EDT... CROSSWICKS AROUND 755 PM EDT... CREAM RIDGE AND ALLENTOWN AROUND 805 PM EDT... IMLAYSTOWN AROUND 810 PM EDT... SIX FLAGS THEME PARK AROUND 815 PM EDT... CLARKSBURG AROUND 820 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY LIGHTNING IS ONE OF NATURES GREATEST KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SUNDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1100 PM EDT SUNDAY EVENING FOR NEW JERSEY AND EASTERN PENNSYLVANIA. && LAT...LON 4029 7456 4015 7435 3991 7473 4001 7488 TIME...MOT...LOC 2339Z 222DEG 20KT 4005 7465 $$ GORSE
1 follow-up statement
000 WWUS51 KPHI 270009 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 809 PM EDT SUN JUL 26 2009 NJC029-270018- /O.CAN.KPHI.SV.W.0141.000000T0000Z-090727T0045Z/ OCEAN NJ- 809 PM EDT SUN JUL 26 2009 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN OCEAN COUNTY IS CANCELLED... THE STORM THAT PROMPTED THE WARNING HAS MOVED OUT OF THE AREA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1100 PM EDT SUNDAY EVENING FOR NEW JERSEY AND EASTERN PENNSYLVANIA. LAT...LON 4004 7470 4006 7483 4029 7456 4019 7441 TIME...MOT...LOC 0008Z 222DEG 20KT 4017 7451 $$ NJC005-021-025-270045- /O.CON.KPHI.SV.W.0141.000000T0000Z-090727T0045Z/ MERCER NJ-MONMOUTH NJ-BURLINGTON NJ- 809 PM EDT SUN JUL 26 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT FOR NORTH CENTRAL BURLINGTON...SOUTHWESTERN MONMOUTH AND SOUTHEASTERN MERCER COUNTIES... AT 808 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR IMLAYSTOWN...OR 14 MILES EAST OF TRENTON...MOVING NORTH AT 25 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... CLARKSBURG BY 815 PM EDT... ROOSEVELT BY 820 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1100 PM EDT SUNDAY EVENING FOR NEW JERSEY AND EASTERN PENNSYLVANIA. && LAT...LON 4004 7470 4006 7483 4029 7456 4019 7441 TIME...MOT...LOC 0008Z 222DEG 20KT 4017 7451 $$ GORSE
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 11:08 PM EDT | Flash Flood Warning | PHI | Sussex, Warren | 2 hr |
| Jul 26, 12:15 AM EDT | Flash Flood Warning | PHI | Sussex | 90 min |
| Jul 26, 3:07 AM EDT | Flash Flood Watch | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more | 20 hr |
| Jul 26, 3:26 AM EDT | Small Craft Advisory | PHI | 30 hr | |
| Jul 26, 3:29 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth | 61 min |
| Jul 26, 3:30 PM EDT | Special Marine Warning | PHI | 60 min | |
| Jul 26, 4:06 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 54 min |
| Jul 26, 4:55 PM EDT | Tornado Warning | PHI | Hunterdon, Middlesex, Morris, Somerset | 55 min |
| Jul 26, 7:07 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth | 53 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.