Alert archive / Delaware / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 53, NWS Wilmington, NC
NWS Wilmington, NC issued this severe thunderstorm warning at Oct 18, 1990, 8:19 PM EDT for Sussex County, Delaware. It was in force for 116 min.
The area
The counties it named.
The facts
- Issued
- Oct 18, 1990, 8:19 PM EDT (00:19 UTC)
- Expired
- Oct 18, 1990, 10:15 PM EDT
- In force
- 116 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 00:00Z, 0.3 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
- 980 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 631 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 261 m²/s²
- 0-3 km storm-relative helicity
- 249 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 7.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KILG 190019 SVRILG DEC005-190215- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING NATIONAL WEATHER SERVICE WILMINGTON DE 819 PM EDT THU OCT 18 1990 THE NATIONAL WEATHER SERVICE IN WILMINGTON HAS ISSUED A SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING EFFECTIVE UNTIL 1015 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS...... IN SOUTH DELAWARE ...SUSSEX COUNTY AND FOR MARINE INTERESTS FROM ...FENWICK ISLAND TO INDIAN RIVER INLET TORNADO WATCH IN EFFECT FOR DELAWARE UNTIL 9PM EDT THIS EVENING... RARAD SHOWS THUNDERSTORMS WITH DOWNPOURS...NEAR GEORGETOWN SOUTHWEST TO JUST EAST OF DELMAR DELAWARE...THESE STORMS ARE MOVING EAST THROUGH SUSSEX COUNTY AND WILL LIKELY PRODUCE HEAVY RAIN WITH SOME STREET AND HIGHWAY FLOODING...DANGEROUS LIGHTNING...DAMAGING WINDS AND POSSIBLE HAIL AND MAYBE A TORNADO. A SPECIAL MARINE WARNING IS ISSUED FOR BOATERS ALONG THE ATLANTIC COAST OF DELAWARE UNTIL THESE STORMS PASS. CKD A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS. 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 FLOODR 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, Oct 18, 6:57 PM EDT, 1 hour 22 minutes before
SPECIAL WEATHER STATEMENT AND WEATHER RADAR SUMMARY NATIONAL WEATHER SERVICE WILMINGTON NC 657 PM EDT THU OCT 18 1990 AT 630 THIS THURSDAY EVENING...THUNDERSTORMS WITH VERY HEAVY PRECIPITATION WERE LINING UP RAPIDLY AND INTENSIFYING FROM THE SOUTHWEST END OF PAMLICO SOUND THROUGH CAPE LOOKOUT ALONG THE ATLANTIC GULF STREAM EAST THROUGH SOUTH OF FYINGPAN SHOALS LIGHT TOWER. THE STORMS WERE MOVING RAPIDLY EAST AND NORTHEAST ABOUT 52 MILES AN HOUR. BOATERS ESPECIALLY SHOULD BE ALERT FOR STRONG GUSTY WINDS AROUND PAMLICO SOUND...CARTERET COUNTY AND ADJOINING ATLANTIC COASTAL WATERS FOR THE NEXT HOUR OR SO UNTIL THESE STORMS PASS. OTHER SHOWERS AND RAIN PATCHES WERE SCATTERED OVER EASTERN NORTH CAROLINA. THUNDERSTORMS EXTENDED FROM THE NORTHEAST PIEDMONT OF NORTH CAROLINA NEAR DURHAM NORTHEAST INTO VIRGINIA NEAR RICHMOND. ALL PRECIPITAITON WAS MOVING EAST AROUND 50 MILES AN HOUR. COVERAGE CONTINUED TO DECREASE OVER EASTERN NORTH CAROLINA.
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.