Alert archive / New Jersey / Tornado Warnings in 2009
Tornado Warning 13, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Oct 24, 2009, 6:31 PM EDT for Hunterdon County, New Jersey. It was in force for 10 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
- Oct 24, 2009, 6:31 PM EDT (22:31 UTC)
- Expired
- Oct 24, 2009, 6:41 PM EDT
- In force
- 10 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Hunterdon County, NJ
The radar
The Philadelphia radar (KDIX), 70 km from the middle of the area, began a volume at 22:33 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, 10.5 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
- 74 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 485 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 282 m²/s²
- 0-3 km storm-relative helicity
- 325 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS51 KPHI 242231 TORPHI NJC019-242300- /O.NEW.KPHI.TO.W.0013.091024T2231Z-091024T2300Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 631 PM EDT SAT OCT 24 2009 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * TORNADO WARNING FOR... SOUTH CENTRAL HUNTERDON COUNTY IN NORTHWEST NEW JERSEY... * UNTIL 700 PM EDT * AT 630 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR SERGEANTSVILLE...OR 16 MILES NORTHWEST OF TRENTON...MOVING NORTHEAST AT 25 MPH. * THE TORNADO WILL BE NEAR... SAND BROOK BY 640 PM EDT... FLEMINGTON BY 650 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. && LAT...LON 4053 7486 4043 7477 4035 7491 4045 7501 TIME...MOT...LOC 2231Z 240DEG 23KT 4040 7494 $$ RNS
1 follow-up statement
000 WWUS51 KPHI 242241 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 641 PM EDT SAT OCT 24 2009 NJC019-242250- /O.CAN.KPHI.TO.W.0013.000000T0000Z-091024T2300Z/ HUNTERDON NJ- 641 PM EDT SAT OCT 24 2009 ...THE TORNADO WARNING FOR SOUTH CENTRAL HUNTERDON COUNTY IS CANCELLED... THE RADAR NO LONGER SHOWS STRONG ROTATION WITH THE STORM. HOWEVER, A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT. LAT...LON 4053 7486 4043 7477 4035 7491 4045 7501 TIME...MOT...LOC 2240Z 240DEG 23KT 4042 7487 $$ RNS
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 24, 4:49 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Somerset, Sussex, Warren | 4 hr |
| Oct 24, 6:19 PM EDT | Severe Thunderstorm Warning | PHI | Salem | 26 min |
| Oct 24, 6:28 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Somerset | 47 min |
| Oct 24, 7:16 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Somerset | 3 hr |
| Oct 24, 7:24 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Middlesex, Monmouth, Ocean and 1 more | 3 hr |
Nearby
Tornado Warnings in New Jersey, 2009Every tornado warning in 2009Tornadoes 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.