Alert archive / Delaware / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 181, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 2, 2009, 12:53 PM EDT for Kent County, Sussex County, Delaware. It was in force for 67 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, 12:53 PM EDT (16:53 UTC)
- Expired
- Aug 2, 2009, 2:00 PM EDT
- In force
- 67 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, Sussex County, DE
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 2, 1:40 PM EDT | TSTM WND DMG | Bridgeville, DE | TRAILER BLOWN ONTO A HIGHWAY IN BRIDGEVILLE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 4.9 hours before the alert went out and 88 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
- 2636 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 482 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 021653
SVRPHI
DEC001-005-021800-
/O.NEW.KPHI.SV.W.0181.090802T1653Z-090802T1800Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1253 PM EDT SUN AUG 2 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHERN KENT COUNTY IN CENTRAL DELAWARE...
SUSSEX COUNTY IN SOUTHERN DELAWARE...
THIS INCLUDES THE CITY OF GEORGETOWN...
* UNTIL 200 PM EDT
* AT 1252 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 9 MILES
WEST OF BRIDGEVILLE...AND MOVING EAST AT 30 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
SEAFORD AROUND 105 PM EDT...
BRIDGEVILLE AROUND 110 PM EDT...
GEORGETOWN AND ELLENDALE AROUND 130 PM EDT...
MILTON AROUND 140 PM EDT...
LEWES AROUND 155 PM EDT...
LEWES AND REHOBOTH BEACH AROUND 200 PM EDT...
LAT...LON 3846 7570 3894 7573 3897 7530 3893 7530
3889 7525 3881 7518 3879 7513 3879 7511
3881 7509 3880 7507 3846 7503 3844 7505
3844 7516
TIME...MOT...LOC 1653Z 265DEG 27KT 3871 7576
$$
IOVINOThe 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, 10:32 AM EDT | Tornado Warning | PHI | New Castle | 28 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 |
Nearby
Severe Thunderstorm Warnings in Delaware, 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.