Alert archive / Maryland / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 13, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at May 10, 1990, 5:48 PM EDT for Caroline County, Dorchester County, Maryland. It was in force for 27 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 10, 1990, 5:48 PM EDT (21:48 UTC)
- Expired
- May 10, 1990, 6:15 PM EDT
- In force
- 27 min
- Issued by
- NWS Baltimore/Washington
- Area
- Whole counties
Counties Caroline County, MD, Dorchester County, MD
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 10, 6:00 PM EDT | Hail 1.75 | Dorchester, MD |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 9.8 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
- 94 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 832 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KBWI 102148
SVRBWI
MDC011-019-102215-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BALTIMORE MD
548 PM EDT THU MAY 10 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 615 PM EDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE STATE OF MARYLAND
SOUTHERN CAROLINE...NORTHERN DORCHESTER
WEATHER RADAR INDICATES A POSSIBLE SEVERE THUNDERSTORM 5 MILES
SOUTHEAST OF CAMBRIDGE IN DORCHESTER COUNTY MOVING TOWARD THE
NORTHEAST AT 45 MPH. ONE INCH HAIL OCCURRED AT PATUXENT RIVER NAVAL
AIR STATION WITH THIS THUNDERSTORM. THIS THUNDERSTORM WILL MOVE
ACROSS NORTHERN DORCHESTER AND SOUTHERN CAROLINE COUNTY DURING THE
NEXT HALF HOUR.
THERE IS FREQUENT DANGEROUS LIGHTNING AND STRONG GUSTY WINDS WITH
THESE THUNDERSTORMS.
THESE ARE DANGEROUS STORMS..SEEK SHELTER IMMEDIATELY.
PLEASE REPORT ALL SEVERE WEATHER TO YOUR LOCAL LAW ENFORCEMENT
OFFICIALS AND ASK THEM TO PASS THE REPORT ALONG TO A WEATHER
SERVICE OFFICE.
SHAVERWhat 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, May 10, 1:28 PM EDT, 4 hours 20 minutes before
MDZ001>007- 102000 NATIONAL WEATHER SERVICE BALTIMORE MD SPECIAL WEATHER STATEMENT [130 PM THUR OCT 10 1990 WEATHER SEARCH RADAR AT PATUXENT RIVER REPORTS AN AREA OF HEAVY RAIN PASSED OVER THE NAVAL AIR STATION DURING THE PAST HOUR. THIS LINE OF HEAVY SHOWERS EXTENDING FROM SOUTHERN MARYLAND NORTHEASTWARD THROUGH THE CENTRAL EASTERN SHORE IS MOVING EAST AT 30 MPH. HEAVY DOWNPOURS FROM THIS LINE OF STORMS COULD PRODUCE LOCALIZED FLOODING OF SMALL STREAMS ROADWAYS AND OTHER LOW LYING AREAS AS THE STORMS MOVE ACROSS THE LOWER EASTERN SHORE. MOTORISTS SHOULD NOT ATTEMPT TO DRIVE ACROSS FLOODED ROADWAYS. PEOPLE SHOULD REMAIN ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AND PREPARE TO SEEK SHELTER SHOULD THREATENING WEATHER APPROACH. DAVIS
Special weather statement, May 10, 3:09 PM EDT, 2 hours 39 minutes before
MDZ001>007-102100 NATIONAL WEATHER SERVICE BALTIMORE MD SPECIAL WEATHER STATEMENT 300 PM THUR OCT 10 1990 A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR ALL OF MARYLAND EXCEPT THE TWO EXTREME WESTERN COUNTIES AND THE LOWER EASTERN SHORE COUNTIES UNTIL 7 PM THIS THURSDAY EVENING... AT 3 PM WEATHER SEARCH RADAR SHOWS A LINE OF SHOWERS AND DEVELOPING THUNDERSTORMS FROM CARROLL COUNTY THROUGH WESTERN HOWARD INTO MONTGOMERY. THE LINE IS MOVING EAST AT 30 MPH WITH INDIVIDUAL CELLS MOVING NORTHEADTWARD. SOME OF THESE STORMS COULD BE ACCOMPANIED BY STRONG GUSTY WINDS HEAVY DOWNPOURS AND HAIL. STORMS EARLIER TODAY PRODUCED JUST UNDER TWO INCHES OF RAIN IN THE WESTMINSTER AREA AND 1.4 INCHES AT FINKSBURG WITH A SMALL STREAM NEAR BANK FULL...BOTH LOCATIONS ARE IN CARROLL COUNTY. ADDITIONAL HEAVY RAINS IN THOSE AREAS COULD PRODUCE SMALL STREAM AND ROADWAY FLOODING.MOTORISTS IN THE METRO AREA SHOULD BE ON THE ALERT FOR HEAVY DOWNPOURS DURING THE EARLY PART OF THIS EVENINGS COMMUTE AS THIS LINE MOVES THROUGH THE METRO AREA BETWEEN 4 AND 5 PM. MARINE INTERESTS ON CHESAPEAKE BAY SHOULD ALSO BE ON THE ALERT FOR RAPIDLY DEVELOPING STORMS AND SEEK SAFE HARBOR IMMEDIATELY. DAVIS...
Special weather statement, May 10, 3:17 PM EDT, 2 hours 31 minutes before
MDZ001>007-102100 NATIONAL WEATHER SERVICE BALTIMORE MD SPECIAL WEATHER STATEMENT 300 PM THUR OCT 10 1990 A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR ALL OF MARYLAND EXCEPT THE TWO EXTREME WESTERN COUNTIES AND THE LOWER EASTERN SHORE COUNTIES UNTIL 7 PM THIS THURSDAY EVENING... AT 3 PM WEATHER SEARCH RADAR SHOWS A LINE OF SHOWERS AND DEVELOPING THUNDERSTORMS FROM CARROLL COUNTY THROUGH WESTERN HOWARD INTO MONTGOMERY. THE LINE IS MOVING EAST AT 30 MPH WITH INDIVIDUAL CELLS MOVING NORTHEASTWARD. SOME OF THESE STORMS COULD BE ACCOMPANIED BY STRONG GUSTY WINDS HEAVY DOWNPOURS AND HAIL. STORMS EARLIER TODAY PRODUCED JUST UNDER TWO INCHES OF RAIN IN THE WESTMINSTER AREA AND 1.4 INCHES AT FINKSBURG WITH A SMALL STREAM NEAR BANK FULL...BOTH LOCATIONS ARE IN CARROLL COUNTY. ADDITIONAL HEAVY RAINS IN THOSE AREAS COULD PRODUCE SMALL STREAM AND ROADWAY FLOODING. MOTORISTS IN THE METRO AREA SHOULD BE ON THE ALERT FOR HEAVY DOWNPOURS DURING THE EARLY PART OF THIS EVENINGS COMMUTE AS THIS LINE MOVES THROUGH THE METRO AREA BETWEEN 4 AND 5 PM. MARINE INTERESTS ON CHESAPEAKE BAY SHOULD ALSO BE ON THE ALERT FOR RAPIDLY DEVELOPING STORMS AND SEEK SAFE HARBOR IMMEDIATELY. DAVIS...
Special weather statement, May 10, 4:25 PM EDT, 1 hour 23 minutes before
MDZ001>007- 102130 NATIONAL WEATHER SERVICE BALTIMORE MD SPECIAL WEATHER STATEMENT 4.15PM EDT THU MAY 10 1990 ...LINE OF THUNDERSTORMS CONTINUES ADVANICING TO THE EAST... AT 4.15PM EDT WEATHER RADAR INDICATED A LINE OF SHOWERS AND THUNDERSTORMS EXTENDING FROM NEAR LANCASTER PENNSYLVANIA SOUTH THROUGH THE BALTIMORE AND WASHINGTON AREAS TO BETWEEN FREDERICKSBURG AND RICMOND VIRGINIA. THE THUNDERSTORMS IN THIS LINE ARE MOVING TOWARD THE NORTHEAST AT 45 MPH AS THE LINE MOVES TOWARD THE EAST SOUTHEAST AT 30 MPH. THERE ARE A FEW THUNDERSTORMS IN THIS LINE THAT MAY PRODUCE STRONG GUSTY WINDS...LOCALLY HEAVY RAIN...DANGEROUS LIGHTNING AND POSSIBLY SOME HAIL. ONE WAS APPROACHING THE BAY BRIDGE JUST NORTH OF ANNAPOLIS AND ANOTHER MOVING ACROSS THE POTOMAC RIVER AND INTO ST MARYS COUNTY NEAR LEONARDTOWN. A SPECIAL MARINE WARNING REMAINS IN EFFECT FOR THE CHESAPEAKE BAY NORTH OF PATUXENT RIVER UNTIL 5.30PM EDT. [ THESE SHOWERS AND THUNDERSTORMS WILL BE CROSSING THE CHESAPEAKE DURING THE NEXT HOUR AND WILL BE MOVING ACROSS THE EASTERN SHORE BETWEEN 5.15PM AND 7PM EDT. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT MUCH OF CENTRAL AND EASTERN MARYLAND UNTIL 7PM EDT. RESIDENTS OF THE CENTRAL AND EASTERN MARYLAND AND THE EASTERN SHORE AS WELL AS THE CHESAPEAKE BAY SHOULD REMAIN ALERT AS THESE STORMS MOVE THROUGH THE REGION AND BE PREPARED TO TAKE COVER IF THREATENING WEATHE IS SIGHTED.8 SHAVER
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 3:47 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 58 min |
| May 10, 4:59 PM EDT | Severe Thunderstorm Warning | LWX | Dorchester | 46 min |
| May 10, 4:59 PM EDT | Severe Thunderstorm Warning | LWX | Calvert, Saint Mary's | 46 min |
| May 10, 6:58 PM EDT | Severe Thunderstorm Warning | LWX | Wicomico | 47 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.