Alert archive / Delaware / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 43, NWS Wilmington, NC
NWS Wilmington, NC issued this severe thunderstorm warning at Jul 12, 1990, 6:26 PM EDT for Sussex County, Delaware. It was in force for 64 min.
The area
The counties it named.
The facts
- Issued
- Jul 12, 1990, 6:26 PM EDT (22:26 UTC)
- Expired
- Jul 12, 1990, 7:30 PM EDT
- In force
- 64 min
- Issued by
- NWS Wilmington, NC
- Area
- Whole counties
County Sussex County, DE
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.4 hours before the alert went out and 84 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
- 1302 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 576 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 165 m²/s²
- 0-3 km storm-relative helicity
- 186 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 2.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KILG 122227 SVRILG DEC005-122330- BULLETIN - EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE WILMINGTON DE 626 PM EDT THU JUL 12 1990 THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 730 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS...... IN SOUTH DELAWARE ...SUSSEX COUNTY WEATHER RADAR SHOWS A POSSIBLE SEVERE THUNDERSTORM NEAR SEAFORD IN WESTERN SUSSEX COUNTY. IT IS MOVING TOWARD THE EAST AT 25 MPH. A SPOTTER IN SEAFORD REPORTED SOME STRONG GUSTY WINDS AND FREQUENT LIGHTNING. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jul 12, 3:48 PM EDT, 2 hours 38 minutes before
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. DS
Special weather statement, Jul 12, 3:49 PM EDT, 2 hours 37 minutes before
NCZ-016-017-122050- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE WILMINGTON NC 345 PM EDT THU JUL 12 1990 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR CENTRAL NORTH CAROLINA AND PORTIONS OF CENTRAL AND WESTERN SOUTH CAROLINA UNTIL 9 PM TONIGHT... A LINE OF VERY STRONG THUNDERSTORMS IS MOVING ACROSS COASTAL SOUTHEAST NORTH CAROLINA. PEOPLE IN CRAVEN...JONES...ONSLOW... CARTERET...PAMLICO...PENDER AND NEW HANOVER COUNTIES AND THE ADJOINING COASTAL WATERS FROM BOGUE INLET TO WRIGHTSVILLE BEACH SHOULD BE ALERT FOR HEAVY DOWNPOURS...STRONG GUSTY WIND...FREQUENT LIGHTNING AND POSSIBLY SMALL HAIL. AT 325 THIS AFTERNOON THE LINE OF VERY STRONG THUNDERSTORMS EXTENDED FROM NEW BERN TO JUST NORTH OF WILMINGTON. THE LINE OF THUNDERSTORMS IS MOVING SLOWLY TO THE SOUTHEAST. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. DS
Special weather statement, Jul 12, 4:46 PM EDT, 1 hour 40 minutes before
NCZ-016-017-122140- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE WILMINGTON NC 446 PM EDT THU JUL 12 1990 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR CENTRAL NORTH CAROLINA AND CENTRAL SOUTH CAROLINA UNTIL 9 PM TONIGHT... AT 430 THIS THURSDAY AFTERNOON...THUNDERSTORMS WERE LINED UP ALONG THE SEABREEZE WIND SHIFT LINE JUST INLAND FROM THE CAROLINA BEACHES FROM PAMLICO SOUND TO MYRTLE BEACH AND GEORGETOWN IN SOUTH CAROLINA. THE STORMS WITH THE HEAVIEST PRECIPITATION WERE LOCATED OVER PENDER...ONSLOW...CRAVEN AND BEAUFORT COUNTIES. THE STORMS WERE MOVING NORTHEAST ABOUT 23 MILES AN HOUR. NO REPORTS OF LARGE HAIL OR DAMAGING WINDS HAVE BEEN RECEIVED THUS FAR THIS AFTERNOON BUT WEATHER RADAR INDICATED VERY HEAVY PRECIPITATION...DANGEROUS LIGHTNING AND POSSIBLE SMALL HAIL WITH THESE STORMS. PERSONS IN SOUTH COASTAL AND CENTRAL COASTAL NORTH CAROLINA SHOULD REMAIN ALERT FOR THESE PHENOMENA AS LONG AS SUNLIGHT KEEPS HEATING MOIST UNSTABLE AIR THE REST OF THIS AFTERNOON AND EVENING. OTHER THUNDERSTORMS EXTENDED OVER THE PIEDMONT FROM NORTHERN SOUTH CAROLINA THROUGH THE GREENSBORO AREA OF NORTH CAROLINA INTO CENTRAL VIRGINIA.
Nearby
Severe Thunderstorm Warnings in Delaware, 1990Every severe thunderstorm warning in 1990
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.