Alert archive / Virginia / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 45, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at May 27, 2001, 1:05 PM EDT for Clarke County, Frederick County, Virginia; Jefferson County, West Virginia. It was in force for 40 min. 2 reports 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 27, 2001, 1:05 PM EDT (17:05 UTC)
- Expired
- May 27, 2001, 1:45 PM EDT
- In force
- 40 min
- Issued by
- NWS Baltimore/Washington
- Area
- Whole counties
Counties Clarke County, VA, Frederick County, VA, Jefferson County, WV
The radar
The Sterling radar (KLWX), 54 km from the middle of the area, began a volume at 17:08 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 27, 1:30 PM EDT | Hail 1.75 | Double Tollgate, VA | Golfball sized hail damaged roofs and siding, stripped paint, broke light fixtures, and shredded vegetation from Double Tollgate to White Post. |
| May 27, 1:33 PM EDT | Tornado F1 | Millwood, VA | A tornado that came from Warren County downed trees across Route 624 (Millville Rd). |
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.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 5.1 hours before the alert went out and 62 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
- 49 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 728 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 74 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.
NWS Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at May 27, 10:00 AM EDT, 3 hours 5 minutes earlier.
Area forecast discussion, May 27, 10:00 AM EDT, 3 hours 5 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON 1000 AM EDT SUN MAY 27 2001 A LINE OF SHOWERS ASSOCIATED WITH THE STRONG SHORTWAVE IS CURRENTLY SWING THROUGH WV. AS IT MOVES IN TO VA AND MD IT WILL ENCOUNTER INCREASING UNSTABLE CONDITIONS. (SEE SWODY1) HAVE ISSUED SWO FOR THIS AFTERNOON. WILL UPDATED FIRST PD FOR STRONGER WORDING FOR TSTMS. WILL ALSO ADD SOME POPS IN TONIGHT FOR THE NE ZONES. .LWX... DC...NONE. MD...NONE. VA...NONE. WV...NONE. ND
In the hours before
Special weather statement, May 27, 9:55 AM EDT, 3 hours 10 minutes before
DCZ001-MDZ003>007-009>011-013-014-VAZ042-053-054-WVZ051>053-272300- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON 955 AM EDT SUN MAY 27 2001 ...SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING... THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER THE DISTRICT OF COLUMBIA...MARYLAND EAST OF WASHINGTON COUNTY TO THE CHESAPEAKE BAY...THE EXTREME NORTHEAST SECTION OF VIRGINIA...AND MORGAN ...BERKELEY...AND JEFFERSON COUNTIES IN THE EASTERN WEST VIRGINIA PANHANDLE. THE LARGE AREA OF LOW PRESSURE WHICH HAS BEEN STATIONARY OVER SOUTHERN MICHIGAN FOR THE PAST FEW DAYS WILL SLOWLY DRIFT TOWARD OUR REGION LATER TODAY AND TONIGHT. AS THE LOW MOVES CLOSER A STRONG DISTURBANCE WILL ROTATE AROUND THE LOW AND WILL PROVIDE THE FOCUS FOR THUNDERSTORMS ACROSS REGION. THUNDERSTORMS WILL DEVELOP TODAY IN THE MOUNTAINS...AND SPREAD EASTWARD THIS AFTERNOON. THE THUNDERSTORMS WILL CONTINUE INTO THE EVENING HOURS...ESPECIALLY IN THE WASHINGTON-BALTIMORE METROPOLITAN AREA. STRONG WIND GUSTS...IN EXCESS OF 60 MPH AND HAIL GREATER THAN THREE-QUARTERS OF AN INCH IN DIAMETER WILL BE THE MAJOR THREATS FROM THESE THUNDERSTORMS. THESE STORMS WILL ALSO PRODUCE AREAS OF HEAVY RAIN...RESULTING IN RAPID RISES ON CREEKS AND SMALLER RIVERS. STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER DETAILS OR UPDATES. FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT HTTP://WWW.NWS.NOAA.GOV/ER/LWX
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 8:13 PM EDT | Flash Flood Warning | LWX | Frederick, City of Winchester | 2 hr |
| May 26, 8:26 PM EDT | Flash Flood Warning | LWX | Shenandoah | 2 hr |
| May 26, 8:58 PM EDT | Severe Thunderstorm Warning | LWX | Clarke | 32 min |
| May 26, 10:19 PM EDT | Flash Flood Warning | LWX | Frederick | 3 hr |
| May 27, 1:05 PM EDT | Severe Thunderstorm Warning | LWX | Shenandoah, Warren | 40 min |
| May 27, 1:05 PM EDT | Severe Thunderstorm Warning | LWX | City of Winchester | 40 min |
| May 27, 1:31 PM EDT | Tornado Warning | LWX | Clarke, Warren | 29 min |
| May 27, 1:50 PM EDT | Severe Thunderstorm Warning | LWX | Clarke, Fauquier, Loudoun | 40 min |
| May 27, 2:25 PM EDT | Severe Thunderstorm Warning | LWX | Fairfax, Loudoun | 50 min |
| May 27, 2:35 PM EDT | Severe Thunderstorm Warning | LWX | Prince William, City of Manassas, City of Manassas Park | 40 min |
| May 27, 2:35 PM EDT | Severe Thunderstorm Warning | LWX | Fauquier | 40 min |
| May 27, 3:02 PM EDT | Severe Thunderstorm Warning | LWX | Howard | 43 min |
| May 27, 3:08 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 37 min |
| May 27, 3:17 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 28 min |
| May 27, 3:26 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel, Baltimore, City of Baltimore | 49 min |
| May 27, 6:53 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 52 min |
| May 26, 8:38 PM EDT | Severe Thunderstorm Warning | LWX | Jefferson | 52 min |
Nearby
Severe Thunderstorm Warnings in Virginia, 2001Severe Thunderstorm Warnings in West Virginia, 2001Every severe thunderstorm warning in 2001
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; radar from the NEXRAD Level II archive.