Alert archive / Delaware / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 154, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2007, 3:23 PM EDT for Sussex County, Delaware. It was in force for 37 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 28, 2007, 3:23 PM EDT (19:23 UTC)
- Expired
- Jul 28, 2007, 4:00 PM EDT
- In force
- 37 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, 7.4 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
- 1581 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 823 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 36 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 281924 SVRPHI DEC005-282000- /O.NEW.KPHI.SV.W.0154.070728T1923Z-070728T2000Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 323 PM EDT SAT JUL 28 2007 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN SUSSEX COUNTY IN SOUTHERN DELAWARE... * UNTIL 400 PM EDT * AT 320 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR MILLSBORO...OR ABOUT 40 MILES SOUTH OF DOVER. THIS STORM WAS NEARLY STATIONARY. * THE SEVERE THUNDERSTORM WILL BE NEAR... 7 MILES SOUTHEAST OF GEORGETOWN BY 400 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. LAT...LON 3851 7535 3855 7513 3880 7515 3873 7549 $$ AMC
2 follow-up statements
000 WWUS51 KPHI 281948 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 346 PM EDT SAT JUL 28 2007 DEC005-282000- /O.CON.KPHI.SV.W.0154.000000T0000Z-070728T2000Z/ SUSSEX DE- 346 PM EDT SAT JUL 28 2007 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT FOR EAST CENTRAL SUSSEX COUNTY... AT 343 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR MILLSBORO...OR ABOUT 41 MILES SOUTH OF DOVER. THIS STORM WAS NEARLY STATIONARY. THE SEVERE THUNDERSTORM WILL BE NEAR... RURAL EASTERN SUSSEX COUNTY AT 400 PM EDT IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. ALSO...RADAR IS ESTIMATING THAT 2 TO 2.5 INCHES OF RAIN MAY HAVE FALLEN FROM THIS STORM WITHIN THE PAST HOUR OR SO. WATCH OUT FOR PONDING OF WATER ON ROADWAYS AND FOR OVERFLOWING DITCHES AND SMALL STREAMS. LAT...LON 3847 7533 3847 7512 3874 7513 3874 7536 $$ AMC
000 WWUS51 KPHI 282005 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 401 PM EDT SAT JUL 28 2007 DEC005-282011- /O.EXP.KPHI.SV.W.0154.000000T0000Z-070728T2000Z/ SUSSEX DE- 401 PM EDT SAT JUL 28 2007 ...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL SUSSEX COUNTY EXPIRED AT 400 PM EDT... HOWEVER...STRONG THUNDERSTORMS CONTINUE TO AFFECT THE SAME SOUTHEAST PART OF SUSSEX COUNTY. THESE STORMS ARE PRODUCING VERY HEAVY RAIN AND DANGEROUS CLOUD-TO-GROUND LIGHTNING. WATCH OUT FOR LOCALIZED FLOODING. LAT...LON 3847 7533 3847 7512 3874 7513 3874 7536 $$ AMC
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.