Alert archive / Delaware / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 166, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 29, 2007, 1:20 PM EDT for Sussex County, Delaware. It was in force for 40 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
- Jul 29, 2007, 1:20 PM EDT (17:20 UTC)
- Expired
- Jul 29, 2007, 2:00 PM EDT
- In force
- 40 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
County Sussex County, DE
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 5.3 hours before the alert went out and 93 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
- 2108 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 627 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 15 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 291720 SVRPHI DEC005-291800- /O.NEW.KPHI.SV.W.0166.070729T1720Z-070729T1800Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 120 PM EDT SUN JUL 29 2007 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN SUSSEX COUNTY IN SOUTHERN DELAWARE... * UNTIL 200 PM EDT * AT 116 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 MILTON...OR ABOUT 28 MILES SOUTH OF DOVER...AND MOVING SOUTHEAST AT 15 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... 7 MILES SOUTHWEST OF LEWES BY 150 PM EDT... 8 MILES NORTHEAST OF MILLSBORO BY 155 PM EDT... THUNDERSTORMS ARE CAPABLE OF PRODUCING HEAVY RAINFALL WHICH MAY RESULT IN LOCALIZED AREAS OF FLOODING. DO NOT DRIVE IN AREAS WHERE WATER IS CROSSING THE ROAD. IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. LAT...LON 3889 7537 3877 7549 3853 7530 3876 7508 $$ AMC
1 follow-up statement
000 WWUS51 KPHI 291806 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 205 PM EDT SUN JUL 29 2007 DEC005-291815- /O.EXP.KPHI.SV.W.0166.000000T0000Z-070729T1800Z/ SUSSEX DE- 205 PM EDT SUN JUL 29 2007 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL SUSSEX COUNTY EXPIRED AT 200 PM EDT... HOWEVER...STRONG THUNDERSTORMS CONTINUE TO DEVELOP OVER THE AREA... AND MAY PRODUCE INTENSE CLOUD-TO-GROUND LIGHTNING AND VERY HEAVY RAIN WITH LOCALIZED FLOODING. LAT...LON 3870 7568 3849 7568 3848 7507 3881 7516 $$ AMC
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 6:07 AM EDT | Severe Thunderstorm Warning | PHI | Kent | 53 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; the sounding from the Mesonet's radiosonde archive.