Alert archive / Pennsylvania / Tornado Warnings in 2009
Tornado Warning 4, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Jun 9, 2009, 3:14 PM EDT for Chester County, Pennsylvania; Cecil County, Maryland. It was in force for 46 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
- Jun 9, 2009, 3:14 PM EDT (19:14 UTC)
- Expired
- Jun 9, 2009, 4:00 PM EDT
- In force
- 46 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Cecil County, MD, Chester County, PA
The radar
The Dover AFB radar (KDOX), 107 km from the middle of the area, began a volume at 19:14 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.2 hours before the alert went out and 30 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
- 1272 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 804 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS51 KPHI 091914 TORPHI MDC015-PAC029-092000- /O.NEW.KPHI.TO.W.0004.090609T1914Z-090609T2000Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 314 PM EDT TUE JUN 9 2009 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * TORNADO WARNING FOR... NORTH CENTRAL CECIL COUNTY IN NORTHEAST MARYLAND... SOUTHWESTERN CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA... * UNTIL 400 PM EDT * AT 314 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR LOMBARD... OR 12 MILES WEST OF NEWARK...MOVING SOUTHEAST AT 15 MPH. * THE TORNADO WILL BE NEAR... LOMBARD AND CALVERT BY 320 PM EDT... BLAKE AND ZION BY 325 PM EDT... BAY VIEW BY 330 PM EDT... PLEASANT HILL...FAIR HILL AND KEMBLESVILLE BY 335 PM EDT... ANDORA BY 340 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. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT TUESDAY EVENING FOR NORTHEASTERN PENNSYLVANIA. && LAT...LON 3976 7581 3961 7589 3964 7607 3978 7606 TIME...MOT...LOC 1914Z 308DEG 14KT 3974 7598 $$ NIERENBERG
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 4:17 AM EDT | Dense Fog Advisory | PHI | 5 hr | |
| Jun 9, 5:38 AM EDT | Severe Thunderstorm Warning | PHI | Berks | 67 min |
| Jun 9, 7:20 AM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 55 min |
| Jun 9, 8:00 AM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 60 min |
| Jun 9, 8:06 AM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 54 min |
| Jun 9, 8:20 AM EDT | Areal Flood Advisory | PHI | Delaware, Montgomery, Philadelphia | 3 hr |
| Jun 9, 8:42 AM EDT | Areal Flood Advisory | PHI | Bucks | 3 hr |
| Jun 9, 9:56 AM EDT | Flash Flood Warning | PHI | Chester | 105 min |
| Jun 9, 1:49 PM EDT | Flash Flood Watch | PHI | Delaware, Philadelphia | 5 hr |
| Jun 9, 2:20 PM EDT | Flash Flood Warning | PHI | Berks, Chester | 3 hr |
| Jun 9, 2:24 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 66 min |
| Jun 9, 2:59 PM EDT | Tornado Warning | PHI | Chester | 32 min |
| Jun 9, 3:08 PM EDT | Tornado Warning | PHI | Chester | 28 min |
| Jun 9, 3:29 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 61 min |
| Jun 9, 4:19 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 56 min |
| Jun 9, 5:13 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 92 min |
| Jun 9, 5:19 PM EDT | Areal Flood Warning | PHI | Cecil | 71 min |
Nearby
Tornado Warnings in Pennsylvania, 2009Tornado Warnings in Maryland, 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.