Alert archive / Delaware / Tornado Warnings in 2009
Tornado Warning 11, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this tornado warning at Aug 2, 2009, 10:32 AM EDT for New Castle County, Delaware; Cecil County, Maryland. It was in force for 28 min. 1 report 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
- Aug 2, 2009, 10:32 AM EDT (14:32 UTC)
- Expired
- Aug 2, 2009, 11:00 AM EDT
- In force
- 28 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties New Castle County, DE, Cecil County, MD
The radar
The Dover AFB radar (KDOX), 93 km from the middle of the area, began a volume at 14:34 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 |
|---|---|---|---|
| Aug 2, 10:40 AM EDT | TSTM WND DMG | Elkton, MD | NUMEROUS TREES DOWN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 2.5 hours before the alert went out and 155 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
- 633 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 689 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 0 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS51 KPHI 021432 TORPHI DEC003-MDC015-021500- /O.NEW.KPHI.TO.W.0011.090802T1432Z-090802T1500Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1032 AM EDT SUN AUG 2 2009 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * TORNADO WARNING FOR... EAST CENTRAL CECIL COUNTY IN NORTHEAST MARYLAND... THIS INCLUDES THE CITY OF ELKTON... CENTRAL NEW CASTLE COUNTY IN NORTHERN DELAWARE... THIS INCLUDES THE CITY OF NEWARK... * UNTIL 1100 AM EDT * AT 1031 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR NORTH EAST...OR 6 MILES WEST OF ELKTON...MOVING EAST AT 35 MPH. * THE TORNADO WILL BE NEAR... ELKTON AND BARKSDALE BY 1040 AM EDT... BRANTWOOD AND 6 MILES SOUTH OF NEWARK BY 1045 AM EDT... GLASGOW AND MOUNT PLEASANT BY 1050 AM EDT... SAINT GEORGES AND BEAR BY 1055 AM EDT... 9 MILES SOUTH OF NEWPORT BY 1100 AM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS. 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 3964 7593 3972 7557 3947 7566 3957 7596 TIME...MOT...LOC 1432Z 271DEG 28KT 3959 7592 $$ TFG
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 2:19 AM EDT | Flash Flood Watch | PHI | New Castle | 13 hr |
| Aug 2, 10:08 AM EDT | Flash Flood Warning | PHI | New Castle | 9 hr |
| Aug 2, 10:08 AM EDT | Severe Thunderstorm Warning | PHI | New Castle | 67 min |
| Aug 2, 10:24 AM EDT | Severe Thunderstorm Warning | PHI | New Castle | 66 min |
| Aug 2, 10:39 AM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 96 min |
| Aug 2, 10:53 AM EDT | Severe Thunderstorm Warning | PHI | New Castle | 67 min |
| Aug 2, 12:13 PM EDT | Areal Flood Advisory | PHI | Kent, Sussex | 3 hr |
| Aug 2, 12:53 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 67 min |
| Aug 2, 12:10 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 65 min |
Nearby
Tornado Warnings in Delaware, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.