Alert archive / Virginia / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 366
The Storm Prediction Center issued this severe thunderstorm watch at Jun 1, 2004, 11:45 AM EDT for 5 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 1, 2004, 11:45 AM EDT (15:45 UTC)
- Expired
- Jun 1, 2004, 6:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 89 counties
Kent County, DE, New Castle County, DE, Sussex County, DE, Allegany County, MD, Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Caroline County, MD, Carroll County, MD, Cecil County, MD, Charles County, MD, City of Baltimore, MD, Dorchester County, MD, Frederick County, MD, Harford County, MD, Howard County, MD, Kent County, MD, Montgomery County, MD, Prince George's County, MD, Queen Anne's County, MD, Saint Mary's County, MD, Somerset County, MD, Talbot County, MD, Washington County, MD, Wicomico County, MD, Worcester County, MD, Atlantic County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ, Accomack County, VA, Albemarle County, VA, Amherst County, VA, Arlington County, VA, Augusta County, VA, Buckingham County, VA, Caroline County, VA, City of Alexandria, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Harrisonburg, VA, City of Lexington, VA, City of Manassas, VA, City of Manassas Park, VA, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Clarke County, VA, Culpeper County, VA, Essex County, VA, Fairfax County, VA, Fauquier County, VA, Fluvanna County, VA, Frederick County, VA, Goochland County, VA, Greene County, VA, Hanover County, VA, King and Queen County, VA, King George County, VA, King William County, VA, Lancaster County, VA, Loudoun County, VA, Louisa County, VA, Madison County, VA, Middlesex County, VA, Nelson County, VA, Northumberland County, VA, Orange County, VA, Page County, VA, Prince William County, VA, Rappahannock County, VA, Richmond County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah County, VA, Spotsylvania County, VA, Stafford County, VA, Warren County, VA, Westmoreland County, VA, Berkeley County, WV, Hampshire County, WV, Hardy County, WV, Jefferson County, WV, Mineral County, WV, Morgan County, WV
The radar
The Sterling radar (KLWX), 60 km from the middle of the area, began a volume at 15:49 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.
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 1:35 PM EDT | Severe Thunderstorm Warning | LWX | Washington | 55 min |
| Jun 1, 1:50 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 55 min |
| Jun 1, 2:17 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 58 min |
| Jun 1, 2:37 PM EDT | Severe Thunderstorm Warning | LWX | Howard | 53 min |
| Jun 1, 2:47 PM EDT | Severe Thunderstorm Warning | LWX | Arlington, City of Alexandria | 43 min |
| Jun 1, 3:01 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 59 min |
| Jun 1, 3:10 PM EDT | Severe Thunderstorm Warning | LWX | Anne Arundel | 65 min |
| Jun 1, 3:25 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May | 50 min |
| Jun 1, 3:46 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 29 min |
| Jun 1, 3:54 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 51 min |
| Jun 1, 4:17 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 43 min |
| Jun 1, 4:30 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 30 min |
| Jun 1, 5:09 PM EDT | Severe Thunderstorm Warning | PHI | Cape May | 36 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 3.8 hours before the alert went out and 57 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
- 16 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 1462 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- -4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 011548
SEL6
SPC WW 011545
DCZ000-DEZ000-MDZ000-NJZ000-VAZ000-WVZ000-CWZ000-012200-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 366
NWS STORM PREDICTION CENTER NORMAN OK
1145 AM EDT TUE JUN 1 2004
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
DISTRICT OF COLUMBIA
DELAWARE
MOST OF MARYLAND
SOUTHERN NEW JERSEY
NORTHERN AND CENTRAL VIRGINIA
THE EASTERN WEST VIRGINIA PANHANDLE
COASTAL WATERS
EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 1145 AM UNTIL 600
PM EDT.
HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 120 STATUTE MILES
EAST AND WEST OF A LINE FROM 40 MILES NORTH OF BALTIMORE MARYLAND
TO 70 MILES SOUTHWEST OF PATUXENT RIVER MARYLAND.
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.
OTHER WATCH INFORMATION...CONTINUE...WW 365...
DISCUSSION...SCATTERED THUNDERSTORMS...INCLUDING POSSIBLE ROTATING
STORMS... EXPECTED TO DEVELOP IN THE NEXT FEW HRS AHEAD OF MID LEVEL
SPEED MAX/ASCENT ZONE NOW CROSSING WV /PER WATER VAPOR IMAGERY/.
MODERATE TO STRONG UNIDIRECTIONAL MEAN FLOW...COOL MID LEVEL
TEMPERATURES... STRONG SURFACE HEATING AND ABSENCE OF STRONG LOW
LEVEL CONVERGENCE SUGGEST POTENTIAL FOR DISCRETE STORMS/STORM
CLUSTERS WITH DAMAGING WIND/HAIL.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 350. MEAN STORM
MOTION VECTOR 27035.
...CORFIDI
394,0742 373,0750 373,0793 394,0785SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 11:11 AM EDT | Mesoscale Discussion | SPC | Kent, New Castle, Sussex | 64 min |
| Jun 1, 4:22 PM EDT | Mesoscale Discussion | SPC | Kent, New Castle, Sussex | 53 min |
| Jun 1, 5:15 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Garrett | 5 hr |
| Jun 1, 7:24 PM EDT | Mesoscale Discussion | SPC | Garrett | 66 min |
| Jun 1, 12:25 PM EDT | Severe Thunderstorm Watch | SPC | Bergen, Burlington, Camden, Essex, Hunterdon, Mercer and 7 more | 6 hr |
| Jun 1, 4:56 PM EDT | Mesoscale Discussion | SPC | Buchanan, Dickenson, Lee, Wise, City of Norton | 34 min |
| Jun 1, 2:30 PM EDT | Mesoscale Discussion | SPC | Cabell, Jackson, Lincoln, Mason, Putnam, Wayne and 1 more | 60 min |
| Jun 1, 3:55 PM EDT | Severe Thunderstorm Watch | SPC | Brooke, Cabell, Hancock, Jackson, Lincoln, Marshall and 9 more | 7 hr |
Nearby
Severe Thunderstorm Watches in Virginia, 2004Severe Thunderstorm Watches in Maryland, 2004Severe Thunderstorm Watches in West Virginia, 2004Every severe thunderstorm watch in 2004
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.