Alert archive / Delaware / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 89, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 22, 2009, 6:07 PM EDT for Kent County, Sussex County, Delaware. It was in force for 68 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
- Jun 22, 2009, 6:07 PM EDT (22:07 UTC)
- Expired
- Jun 22, 2009, 7:15 PM EDT
- In force
- 68 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, Sussex County, DE
The radar
The Dover AFB radar (KDOX), 20 km from the middle of the area, began a volume at 22:10 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 |
|---|---|---|---|
| Jun 22, 7:00 PM EDT | TSTM WND GST 60 | 3 W Dagsboro, DE | TORRENTIAL DOWNPOURS |
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, 10.1 hours before the alert went out and 80 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
- 1 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 927 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 222207 SVRPHI DEC001-005-222315- /O.NEW.KPHI.SV.W.0089.090622T2207Z-090622T2315Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 607 PM EDT MON JUN 22 2009 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN KENT COUNTY IN CENTRAL DELAWARE... CENTRAL SUSSEX COUNTY IN SOUTHERN DELAWARE... THIS INCLUDES THE CITY OF GEORGETOWN... * UNTIL 715 PM EDT * AT 606 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR MILFORD...OR 16 MILES NORTH OF GEORGETOWN...AND MOVING SOUTH AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... ELLENDALE AROUND 625 PM EDT... 7 MILES WEST OF MILTON AROUND 630 PM EDT... GEORGETOWN AROUND 645 PM EDT... SYCAMORE AROUND 700 PM EDT... 7 MILES WEST OF MILLSBORO AND 8 MILES EAST OF LAUREL AROUND 705 PM EDT... GUMBORO AROUND 715 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. && LAT...LON 3845 7556 3893 7558 3895 7535 3845 7523 TIME...MOT...LOC 2207Z 354DEG 21KT 3891 7547 $$ PO
1 follow-up statement
000 WWUS51 KPHI 222236 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 636 PM EDT MON JUN 22 2009 DEC001-222246- /O.CAN.KPHI.SV.W.0089.000000T0000Z-090622T2315Z/ KENT DE- 636 PM EDT MON JUN 22 2009 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL KENT COUNTY IS CANCELLED... LAT...LON 3845 7548 3878 7547 3880 7531 3845 7523 TIME...MOT...LOC 2236Z 354DEG 21KT 3873 7537 $$ DEC005-222315- /O.CON.KPHI.SV.W.0089.000000T0000Z-090622T2315Z/ SUSSEX DE- 636 PM EDT MON JUN 22 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT FOR CENTRAL SUSSEX COUNTY... AT 635 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM WAS LOCATED NEAR GEORGETOWN...MOVING SOUTH AT 25 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... MILLSBORO BY 700 PM EDT... GUMBORO BY 715 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. && LAT...LON 3845 7548 3878 7547 3880 7531 3845 7523 TIME...MOT...LOC 2236Z 354DEG 21KT 3873 7537 $$ PO
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; radar from the NEXRAD Level II archive.