Alert archive / Virginia / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 129, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 1, 2004, 2:47 PM EDT for Arlington County, City of Alexandria, Virginia. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 1, 2004, 2:47 PM EDT (18:47 UTC)
- Expired
- Jun 1, 2004, 3:30 PM EDT
- In force
- 43 min
- Issued by
- NWS Baltimore/Washington
- Area
- Counties, with a storm outline in the text
Counties Arlington County, VA, City of Alexandria, VA
The radar
The Sterling radar (KLWX), 39 km from the middle of the area, began a volume at 18:49 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 1, 11:45 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 6.8 hours before the alert went out and 31 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
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 Jun 1, 12:33 PM EDT, 2 hours 14 minutes earlier.
Area forecast discussion, Jun 1, 12:33 PM EDT, 2 hours 14 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1233 PM EDT TUE JUN 1 2004 UPDATED FCST FOR SVR TSTM WATCH VALID UNTIL 6PM EDT. STILL SOME QUESTIONS ABT STORM CVRG GIVEN LACK OF LOW-LVL CONVERGENCE GIVEN DOWNSLOPE WRLY FLOW. BEST CVRG STILL IN EXPECTED IN THE NORTH CLOSER TO TRACK OF MCV AND IN AREA UNDER LFQ OF UPPER JET. LOW-LVL MOISTURE IS LIMITED WITH TDS IN THE MID 50S. ONLY FVRBL FACTOR FOR SVR IS COLD MID-LVL TEMPS NEAR -15C SUGGESTING LARGE HAIL IN STRONGEST STORMS. ROSA .LONG TERM...WED-MON OVERALL NOT TOO MANY CHANGES IN THE LONG TERM. A CHC OF RW/TRW WED AFTN AND NIGHT AS THE UPR TROF/CD FNT MV THRU THE GRT LKS W/ A FAIRLY STG JET PROGGED OVRHD. XPCT PCPN CHC THROUGH THU EVE...AND THEN HIGH PRES BUILDS IN FOR DRIER CONDITIONS FRI AND SAT W/ SEASONABLE TEMPS. ZNL FLOW WI CHC POPS FOR NEXT MON W/ VORT MAX PROGGED TO MV INTO CWA. ND && .LWX WATCHES/WARNINGS/ADVISORIES... DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...NONE.
Hazardous weather outlook, Jun 1, 12:31 PM EDT, 2 hours 16 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1231 PM EDT TUE JUN 1 2004 DCZ001-MDZ002>007-009>011-013-014-016>018-VAZ021-025>031-036>042- 050>057-WVZ048>055-020800- 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- 1231 PM EDT TUE JUN 1 2004 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... A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE ENTIRE AREA. THUNDERSTORMS ARE DEVELOPING ACROSS WEST VIRGINIA AND MOVING EAST. SOME OF THE STRONGER STORMS MAY PRODUCE GUSTY WINDS AND LARGE HAIL. .DAYS TWO THROUGH SEVEN... SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP WEDNESDAY AFTERNOON AND EARLY THURSDAY. SOME OF THE STORMS MAY PRODUCE STRONG GUSTY WINDS AND HAIL. .SPOTTER INFORMATION STATEMENT... SKYWARN HAS BEEN ACTIVATED. PLEASE RELAY REPORTS TO THE NWS. ABW
In the hours before
Local storm report, Jun 1, 1:47 PM EDT, 1 hour before
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<h1 id="headline">This service is currently unavailable.</h1>
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The site you requested is temporarily down for maintenance or an unexpected outage.
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</html>The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 8:13 PM EDT | Severe Thunderstorm Warning | LWX | Loudoun | 32 min |
| May 31, 9:11 PM EDT | Special Marine Warning | LWX | 2 hr | |
| May 31, 9:37 PM EDT | Special Marine Warning | LWX | 113 min | |
| Jun 1, 1:35 PM EDT | Severe Thunderstorm Warning | LWX | Clarke, Frederick, City of Winchester | 55 min |
| Jun 1, 1:50 PM EDT | Severe Thunderstorm Warning | LWX | Loudoun | 55 min |
| Jun 1, 2:16 PM EDT | Special Marine Warning | LWX | 119 min | |
| Jun 1, 2:16 PM EDT | Special Marine Warning | LWX | 119 min | |
| Jun 1, 2:16 PM EDT | Special Marine Warning | LWX | 119 min | |
| Jun 1, 2:17 PM EDT | Severe Thunderstorm Warning | LWX | Fairfax, City of Fairfax, City of Falls Church | 58 min |
| Jun 1, 2:43 PM EDT | Special Marine Warning | LWX | 62 min | |
| Jun 1, 3:41 PM EDT | Special Marine Warning | LWX | 49 min | |
| Jun 1, 3:49 PM EDT | Special Marine Warning | LWX | 86 min | |
| Jun 1, 4:15 PM EDT | Special Marine Warning | LWX | 45 min | |
| Jun 1, 7:10 PM EDT | Severe Thunderstorm Warning | LWX | Highland | 65 min |
| Jun 1, 2:37 PM EDT | Severe Thunderstorm Warning | LWX | Howard | 53 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, 3:46 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 29 min |
Nearby
Severe Thunderstorm Warnings in Virginia, 2004Every severe thunderstorm warning 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.