Alert archive / Maryland / Severe Thunderstorm Warnings in 2005
Severe Thunderstorm Warning 13, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Apr 23, 2005, 4:50 PM EDT for Montgomery County, Maryland. It was in force for 40 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
- Apr 23, 2005, 4:50 PM EDT (20:50 UTC)
- Expired
- Apr 23, 2005, 5:30 PM EDT
- In force
- 40 min
- Issued by
- NWS Baltimore/Washington
- Area
- Counties, with a storm outline in the text
County Montgomery County, MD
The radar
The Sterling radar (KLWX), 34 km from the middle of the area, began a volume at 20:53 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 23, 1:10 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 8.8 hours before the alert went out and 30 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
- 7 J/kg
- Mixed-layer CIN
- -138 J/kg
- Mixed-layer LCL
- 485 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 166 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 KLWX 232051
SVRLWX
MDC031-232130-
/O.NEW.KLWX.SV.W.0013.050423T2050Z-050423T2130Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
450 PM EDT SAT APR 23 2005
THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
MONTGOMERY COUNTY IN CENTRAL MARYLAND
* UNTIL 530 PM EDT
* AT 448 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 3 MILES NORTHWEST
OF GERMANTOWN TO 2 MILES NORTHWEST OF ASPEN HILL TO BETHESDA...
MOVING NORTHEAST AT 30 MPH.
* LOCATIONS IMPACTED INCLUDE...
CHEVY CHASE...
ASPEN HILL...
DAMASCUS...
COLESVILLE...
FAIRLAND...
HAIL TO THE SIZE OF PENNIES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED
IN THE WARNED AREA. STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE
STORM HAS PASSED.
BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.
LAT...LON 3925 7739 3906 7716 3894 7714 3909 7693
3923 7707 3934 7722
$$1 follow-up statement
000
WWUS51 KLWX 232118
SVSLWX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
518 PM EDT SAT APR 23 2005
MDC031-232128-
/O.CAN.KLWX.SV.W.0013.000000T0000Z-050423T2130Z/
MONTGOMERY MD-
518 PM EDT SAT APR 23 2005
...THE SEVERE THUNDERSTORM WARNING FOR MONTGOMERY COUNTY IS
CANCELLED...
THE SEVERE THUNDERSTORM HAD MOVED OUT OF MONTGOMERY COUNTY AND
WEAKENED...THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT.
LAT...LON 3925 7739 3906 7716 3894 7714 3909 7693
3923 7707 3934 7722
$$
ROSA/MANNINGWhat 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.
NWS Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 23, 2:41 PM EDT, 2 hours 9 minutes earlier.
Area forecast discussion, Apr 23, 2:41 PM EDT, 2 hours 9 minutes before
.SHORT TERM (TONIGHT THROUGH MONDAY)...
...SEVERE THUNDERSTORM WATCH 200 IN EFFECT FOR CENTRAL AND EASTERN
PORTIONS OF THE FORECAST AREA THROUGH 8 PM...
STRONG HEATING AHEAD OF THE UPPER TROUGH HAS HELPED TO DESTABILIZE
THE AREA EAST OF THE APPALACHIANS. SQUALL LINE WILL BEGIN TO
ORGANIZE IN THE AFTERNOON HOURS. MAIN THREAT WILL BE DAMAGING WINDS
NEAR 60 MPH AND LARGE HAIL OF PENNY SIZE AND LARGER. FLASH FLOOD
GUIDANCE FROM MARFC IS HIGH ENOUGH TO DIMINISH FLASH FLOODING
RISK.
SEE SPSLWX...NOWLWX...AND ANY WARNINGS ISSUED FOR FURTHER DETAILS.
...SNOW ADVISORY IN EFFECT FROM MIDNIGHT SUNDAY TO 6 AM MONDAY...
STRONG COLD AIR ADVECTION BEHIND THE FRONT WILL BRING MUCH COOLER
AIR INTO THE FORECAST AREA TONIGHT...WITH TEMPERATURES IN THE LOWER
30S IN THE WESTERN RIDGES AND RAIN SHOWERS WILL CHANGE OVER TO SNOW
SHOWERS IN WEST OF THE ALLEGANY FRONT THIS EVENING. EXPECTING A RAIN
SNOW MIX BEFORE CHANGING TO SNOW ALONG THE RIDGE OVERNIGHT. ONGOING
FORECAST OF 2 TO 4 INCHES STORM TOTAL LOOK GOOD FOR NOW.
SEE WSWLWX FOR FURTHER DETAILS ON WINTER WEATHER.
&&
.LONG TERM (MONDAY THROUGH SATURDAY)...
THE REMAINDER OF THE FORECAST AREA WILL BE RATHER DREARY ON MONDAY
WITH COOL...CLOUDY...AND BREEZY CONDITIONS. TEMPERATURES WILL BE
WELL BELOW NORMAL WITH HIGHS RANGING FROM THE MID 40S IN THE WEST TO
THE THE MID TO UPPER 50S IN THE SOUTHEAST.
CONDITIONS WILL BEGIN TO IMPROVE TUESDAY AS THE TROUGH BEGINS TO
MOVE OUT OF THE AREA AND HIGH PRESSURE BUILDS IN FROM THE SOUTH. A
WEAKER COLD FRONT WILL APPROACH THE AREA ON WEDNESDAY...BRINGING THE
NEXT CHANCE OF RAIN.
&&
.MARINE...
SMALL CRAFT ADVISORY CONDITIONS WILL CONTINUE THIS AFTERNOON. WINDS
WILL DIMINISH OVERNIGHT BUT INCREASE AGAIN TOMORROW AS THE GRADIENT
TIGHTENS. SMALL CRAFT CONDITIONS ARE EXPECTED TO CONTINUE INTO
MONDAY AFTERNOON.
&&
.AVIATION...
THUNDERSTORMS THIS AFTERNOON AND EARLY THIS EVENING WILL LOWER
CEILINGS AND VISIBILITIES. GUSTY WINDS TO 40 KT NEAR THUNDERSTORMS
ARE EXPECTED. SNOW SHOWERS WEST OF THE ALLEGANY FRONT WILL ALSO
LOWER VISIBILITIES AND CEILINGS...OBSCURING THE MOUNTAINS.
&&
.LWX WATCHES/WARNINGS/ADVISORIES...
DC...NONE.
MD...SNOW ADVISORY FOR MDZ002 FROM MIDNIGHT SUNDAY TO 6 AM MONDAY.
VA...SNOW ADVISORY FOR VAZ021 FROM MIDNIGHT SUNDAY TO 6 AM MONDAY.
WV...SNOW ADVISORY FOR WVZ048-049-054 FROM MIDNIGHT SUNDAY TO 6 AM
MONDAY.
MARINE...SMALL CRAFT ADVISORY FOR THE TIDAL POTOMAC AND MARYLAND
PORTION OF THE CHESAPEAKE BAY.Hazardous weather outlook, Apr 23, 9:55 AM EDT, 6 hours 55 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 955 AM EDT SAT APR 23 2005 DCZ001-MDZ002>007-009>011-013-014-016>018-VAZ021-025>031-036>042- 050>057-WVZ048>055-241000- ALBEMARLE VA-ALLEGANY MD-ANNE ARUNDEL MD- ARLINGTON/FALLS CHURCH/ALEXANDRIA VA-AUGUSTA VA-BERKELEY WV- CALVERT MD-CARROLL MD-CHARLES MD-CLARKE VA-CULPEPER VA- DISTRICT OF COLUMBIA DC-FAIRFAX VA-FAUQUIER VA-FREDERICK VA- FREDERICK MD-GRANT WV-GREENE VA-HAMPSHIRE WV-HARDY WV-HARFORD MD- HIGHLAND VA-HOWARD MD-JEFFERSON WV-KING GEORGE VA-LOUDOUN VA- MADISON VA-MINERAL WV-MONTGOMERY MD-MORGAN WV-NELSON VA- NORTHERN BALTIMORE MD-ORANGE VA-PAGE VA-PENDLETON WV- PRINCE GEORGES MD-PRINCE WILLIAM/MANASSAS/MANASSAS PARK VA- RAPPAHANNOCK VA-ROCKINGHAM VA-SHENANDOAH VA-SOUTHERN BALTIMORE MD- SPOTSYLVANIA VA-ST. MARYS MD-STAFFORD VA-WARREN VA-WASHINGTON MD- 955 AM EDT SAT APR 23 2005 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MARYLAND WEST OF THE CHESAPEAKE BAY AND EAST OF GARRETT COUNTY...EASTERN WEST VIRGINIA...NORTHERN AND CENTRAL VIRGINIA AND WASHINGTON DC. .DAY ONE... SEVERE THUNDERSTORMS ARE EXPECTED TODAY ACROSS MUCH OF THE AREA INCLUDING NORTHERN AND CENTRAL VIRGINIA...MARYLAND...THE DISTRICT OF COLUMBIA AND THE EASTERN WEST VIRGINIA PANHANDLE. A STRONG COLD FRONT WILL CROSS THE REGION THIS AFTERNOON. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG AND AHEAD OF THE COLD FRONT AND INTENSIFY AS THEY APPROACH FROM THE WEST. THUNDERSTORMS ARE EXPECTED TO DEVELOP IN THE SHENANDOAH VALLEY BETWEEN 11 AM AND 1 PM. EAST OF THE BLUE RIDGE INCLUDING THE WASHINGTON AND BALTIMORE METROPOLITAN AREAS...THUNDERSTORMS ARE EXPECTED TO APPROACH THE AREA BETWEEN NOON AND 2 PM. THE RISK OF SEVERE WEATHER IS EXPECTED TO END WEST OF THE BLUE RIDGE LATE THIS AFTERNOON BETWEEN 3 PM AND 5 PM. THE SEVERE WEATHER IS EXPECTED TO MOVE EAST OF THE CHESAPEAKE BAY BETWEEN 5 PM AND 7 PM. THE MAIN THREAT FROM SEVERE THUNDERSTORMS TODAY WILL BE LARGE HAIL OF PENNY SIZED OR LARGER AND DAMAGING WINDS IN EXCESS OF 60 MPH. LOCALLY HEAVY DOWNPOURS ARE ALSO EXPECTED. .DAYS TWO THROUGH SEVEN... AFTER THE COLD FRONT...SNOW SHOWERS WILL BRING ACCUMULATING SNOW TO THE WESTERN HIGHLANDS FROM FROSTBURG MARYLAND...DOWN THROUGH MOUNT STORM AND SPRUCE MOUNTAIN IN WEST VIRGINIA...TO WESTERN HIGHLAND COUNTY VIRGINIA. TWO TO FOUR INCHES OF SNOW CAN BE EXPECTED ON THIS WESTERN RIDGELINE FROM EARLY SUNDAY MORNING THROUGH 6 AM MONDAY. A SNOW ADVISORY HAS BEEN ISSUED FOR THAT AREA. ALSO...LOW TEMPERATURES BELOW FREEZING CAN BE EXPECTED IN THE MOUNTAINS BOTH EARLY SUNDAY MORNING AND EARLY MONDAY MORNING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS EXPECTED AROUND NOON TODAY...LASTING INTO THE EARLY EVENING HOURS. ALSO...SNOW SPOTTER REPORTS ARE ENCOURAGED. MANNING
In the hours before
Local storm report, Apr 23, 3:45 PM EDT, 1 hour 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
345 PM EDT SAT APR 23 2005
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0325 PM HAIL CHANCELLORSVILLE 38.30N 77.63W
04/23/2005 0.75 INCH SPOTSYLVANIA VA OTHER FEDERAL
REPORTED BY A PARK RANGER FROM THE NATIONAL PARK SERVICE
&&Local storm report, Apr 23, 3:55 PM EDT, 55 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
355 PM EDT SAT APR 23 2005
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0325 PM HAIL CHANCELLORSVILLE 38.30N 77.63W
04/23/2005 0.75 INCH SPOTSYLVANIA VA OTHER FEDERAL
REPORTED BY A PARK RANGER FROM THE NATIONAL PARK SERVICE
0345 PM HAIL HARTWOOD 38.40N 77.57W
04/23/2005 0.75 INCH STAFFORD VA LAW ENFORCEMENT
REPORT GIVEN BY HARTWOOD FIRE DEPARTMENT
&&Local storm report, Apr 23, 4:17 PM EDT, 33 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
417 PM EDT SAT APR 23 2005
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0325 PM HAIL CHANCELLORSVILLE 38.30N 77.63W
04/23/2005 0.75 INCH SPOTSYLVANIA VA OTHER FEDERAL
REPORTED BY A PARK RANGER FROM THE NATIONAL PARK SERVICE
0345 PM HAIL HARTWOOD 38.40N 77.57W
04/23/2005 0.75 INCH STAFFORD VA LAW ENFORCEMENT
REPORT GIVEN BY HARTWOOD FIRE DEPARTMENT
0410 PM HAIL QUANTICO 38.52N 77.29W
04/23/2005 1.75 INCH PRINCE WILLIAM VA OTHER FEDERAL
FROM TURNER FIELD OBSERVER
&&Local storm report, Apr 23, 4:29 PM EDT, 21 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
429 PM EDT SAT APR 23 2005
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0325 PM HAIL CHANCELLORSVILLE 38.30N 77.63W
04/23/2005 0.75 INCH SPOTSYLVANIA VA OTHER FEDERAL
REPORTED BY A PARK RANGER FROM THE NATIONAL PARK SERVICE
0345 PM HAIL HARTWOOD 38.40N 77.57W
04/23/2005 0.75 INCH STAFFORD VA LAW ENFORCEMENT
REPORT GIVEN BY HARTWOOD FIRE DEPARTMENT
0410 PM HAIL WIDEWATER 38.46N 77.33W
04/23/2005 1.75 INCH STAFFORD VA OTHER FEDERAL
FROM TURNER FIELD OBSERVER
&&Local storm report, Apr 23, 4:50 PM EDT, 0 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
450 PM EDT SAT APR 23 2005
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0325 PM HAIL CHANCELLORSVILLE 38.30N 77.63W
04/23/2005 0.75 INCH SPOTSYLVANIA VA OTHER FEDERAL
REPORTED BY A PARK RANGER FROM THE NATIONAL PARK SERVICE
0345 PM HAIL HARTWOOD 38.40N 77.57W
04/23/2005 0.75 INCH STAFFORD VA LAW ENFORCEMENT
REPORT GIVEN BY HARTWOOD FIRE DEPARTMENT
0410 PM HAIL WIDEWATER 38.46N 77.33W
04/23/2005 1.75 INCH STAFFORD VA OTHER FEDERAL
FROM TURNER FIELD OBSERVER
0450 PM HAIL FALLS CHURCH 38.88N 77.17W
04/23/2005 0.75 INCH CITY OF FALLS CHUR VA LAW ENFORCEMENT
REPORTED BY CITY OF FALLS CHURCH POLICE DEPARTMENT
&&The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 4:17 PM EDT | Severe Thunderstorm Warning | LWX | Charles | 58 min |
| Apr 23, 4:52 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 53 min |
| Apr 23, 5:16 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel | 59 min |
| Apr 23, 5:47 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore | 58 min |
| Apr 23, 6:34 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 26 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2005Every severe thunderstorm warning in 2005
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; radar from the NEXRAD Level II archive.