Alert archive / Maryland / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 9, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at May 10, 1990, 3:47 PM EDT for Prince George's County, Maryland. It was in force for 58 min.
The area
The counties it named.
The facts
- Issued
- May 10, 1990, 3:47 PM EDT (19:47 UTC)
- Expired
- May 10, 1990, 4:45 PM EDT
- In force
- 58 min
- Issued by
- NWS Baltimore/Washington
- Area
- Whole counties
County Prince George's County, MD
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, 7.8 hours before the alert went out and 161 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, May 10, 1:28 PM EDT, 2 hours 19 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, 38 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, 30 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...
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 5:48 PM EDT | Severe Thunderstorm Warning | LWX | Caroline, Dorchester | 27 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; the sounding from the Mesonet's radiosonde archive.