Alert archive / Delaware / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 57, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 11, 2007, 6:24 PM EDT for Sussex County, Delaware. It was in force for 36 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 11, 2007, 6:24 PM EDT (22:24 UTC)
- Expired
- Jun 11, 2007, 7:00 PM EDT
- In force
- 36 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 25 km from the middle of the area, began a volume at 22:28 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 11, 6:35 PM EDT | HAIL 0.88 | 3 Nnw Laurel, DE | NICKEL SIZE HAIL WAS REPORTED JUST SOUTH-SOUTHEAST OF THE SEAFORD AREA. REPORT WAS RELAYED BY WFO WAKEFIELD. |
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, 10.4 hours before the alert went out and 77 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
- 174 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 697 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 112225 SVRPHI DEC005-112300- /O.NEW.KPHI.SV.W.0057.070611T2224Z-070611T2300Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 624 PM EDT MON JUN 11 2007 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN SUSSEX COUNTY IN SOUTHERN DELAWARE... * UNTIL 700 PM EDT * AT 623 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM. THIS STORM WAS LOCATED JUST EAST OF SEAFORD...OR ABOUT 37 MILES SOUTH OF DOVER...AND MOVING SOUTH AT 10 TO 15 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... LAUREL BY 640 PM EDT... LAT...LON 3873 7547 3870 7571 3847 7569 3846 7537 $$ JRP
1 follow-up statement
000 WWUS51 KPHI 112233 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 632 PM EDT MON JUN 11 2007 DEC005-112300- /O.CON.KPHI.SV.W.0057.000000T0000Z-070611T2300Z/ SUSSEX DE- 632 PM EDT MON JUN 11 2007 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT FOR SOUTHWESTERN SUSSEX COUNTY... AT 628 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED JUST NORTH OF LAUREL...OR ABOUT 40 MILES SOUTH OF DOVER...MOVING SOUTH AT 10 TO 15 MPH. THE SEVERE THUNDERSTORM WILL BE OVER... LAUREL IN SOUTHWESTERN SUSSEX COUNTY BY 640 PM EDT LAT...LON 3873 7547 3870 7571 3847 7569 3846 7537 $$ JRP
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 3:06 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 22 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2007Every severe thunderstorm warning in 2007
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.