Alert archive / West Virginia / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 155
The Storm Prediction Center issued this severe thunderstorm watch at May 7, 2004, 11:00 AM EDT for 5 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 7, 2004, 11:00 AM EDT (15:00 UTC)
- Expired
- May 7, 2004, 5:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 87 counties
Allegany County, MD, Anne Arundel County, MD, Baltimore County, MD, Carroll County, MD, City of Baltimore, MD, Frederick County, MD, Garrett County, MD, Harford County, MD, Howard County, MD, Montgomery County, MD, Washington County, MD, Athens County, OH, Belmont County, OH, Coshocton County, OH, Gallia County, OH, Guernsey County, OH, Harrison County, OH, Hocking County, OH, Licking County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Vinton County, OH, Washington County, OH, Adams County, PA, Bedford County, PA, Blair County, PA, Cumberland County, PA, Dauphin County, PA, Fayette County, PA, Franklin County, PA, Fulton County, PA, Greene County, PA, Huntingdon County, PA, Juniata County, PA, Lancaster County, PA, Lebanon County, PA, Perry County, PA, Somerset County, PA, Washington County, PA, Westmoreland County, PA, York County, PA, Arlington County, VA, City of Fairfax, VA, City of Falls Church, VA, City of Winchester, VA, Clarke County, VA, Frederick County, VA, Loudoun County, VA, Shenandoah County, VA, Warren County, VA, Barbour County, WV, Berkeley County, WV, Braxton County, WV, Brooke County, WV, Calhoun County, WV, Doddridge County, WV, Gilmer County, WV, Grant County, WV, Hampshire County, WV, Hardy County, WV, Harrison County, WV, Jackson County, WV, Jefferson County, WV, Lewis County, WV, Marion County, WV, Marshall County, WV, Mason County, WV, Mineral County, WV, Monongalia County, WV, Morgan County, WV, Ohio County, WV, Pleasants County, WV, Preston County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV
The radar
The Pittsburgh radar (KPBZ), 90 km from the middle of the area, began a volume at 15:01 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
14 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 11:16 AM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair | 29 min |
| May 7, 11:42 AM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 33 min |
| May 7, 11:49 AM EDT | Severe Thunderstorm Warning | CTP | Bedford, Fulton | 41 min |
| May 7, 12:12 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin | 63 min |
| May 7, 12:37 PM EDT | Severe Thunderstorm Warning | CTP | Adams | 53 min |
| May 7, 1:04 PM EDT | Severe Thunderstorm Warning | CTP | York | 71 min |
| May 7, 1:49 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 56 min |
| May 7, 3:02 PM EDT | Severe Thunderstorm Warning | RLX | Ritchie, Wirt, Wood | 28 min |
| May 7, 4:00 PM EDT | Severe Thunderstorm Warning | RLX | Lewis | 30 min |
| May 7, 4:09 PM EDT | Severe Thunderstorm Warning | RLX | Harrison, Taylor | 21 min |
| May 7, 4:19 PM EDT | Severe Thunderstorm Warning | RLX | Barbour, Upshur | 41 min |
| May 7, 4:31 PM EDT | Severe Thunderstorm Warning | PBZ | Preston, Tucker | 59 min |
| May 7, 4:40 PM EDT | Severe Thunderstorm Warning | RLX | Randolph | 50 min |
| May 7, 4:44 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, Shenandoah | 46 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
Pittsburgh, PA (KPIT), launched 12:00Z, 3.0 hours before the alert went out and 75 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
- 50 J/kg
- Mixed-layer CIN
- -283 J/kg
- Mixed-layer LCL
- 1094 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 10:29 AM EDT | Mesoscale Discussion | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 13 more | 91 min |
| May 7, 1:24 PM EDT | Mesoscale Discussion | SPC | Cecil, Kent, Queen Anne's | 96 min |
| May 7, 1:40 PM EDT | Severe Thunderstorm Watch | SPC | Caroline, Cecil, Kent, Queen Anne's, Talbot | 3 hr |
| May 7, 1:49 PM EDT | Mesoscale Discussion | SPC | Allegany, Garrett, Washington | 86 min |
| May 7, 4:35 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 16 more | 5 hr |
| May 7, 6:17 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Charles, Dorchester and 13 more | 118 min |
| May 6, 9:37 PM EDT | Mesoscale Discussion | SPC | Defiance, Erie, Fulton, Henry, Huron, Lucas and 7 more | 83 min |
| May 6, 10:10 PM EDT | Severe Thunderstorm Watch | SPC | Allen, Crawford, Defiance, Fulton, Hancock, Henry and 11 more | 5 hr |
| May 6, 11:05 PM EDT | Mesoscale Discussion | SPC | Ashland, Ashtabula, Cuyahoga, Geauga, Lake, Lorain and 7 more | 85 min |
| May 6, 11:20 PM EDT | Severe Thunderstorm Watch | SPC | Ashland, Ashtabula, Carroll, Columbiana, Crawford, Cuyahoga and 27 more | 5 hr |
| May 7, 3:13 AM EDT | Mesoscale Discussion | SPC | Ashtabula, Carroll, Columbiana, Cuyahoga, Erie, Geauga and 15 more | 62 min |
| May 7, 7:38 AM EDT | Mesoscale Discussion | SPC | Mercer | 97 min |
| May 7, 9:30 AM EDT | Mesoscale Discussion | SPC | Allen, Auglaize, Champaign, Clark, Coshocton, Darke and 26 more | 90 min |
| May 7, 9:30 AM EDT | Severe Thunderstorm Watch | SPC | Allen, Auglaize, Butler, Champaign, Clark, Clinton and 24 more | 6 hr |
| May 7, 12:49 PM EDT | Mesoscale Discussion | SPC | Athens, Champaign, Clark, Clinton, Delaware, Fairfield and 24 more | 86 min |
| May 7, 7:02 PM EDT | Mesoscale Discussion | SPC | Caroline, Essex, Fluvanna, Gloucester, Goochland, Hanover and 13 more | 2 hr |
| May 7, 7:20 PM EDT | Severe Thunderstorm Watch | SPC | Accomack, Caroline, Essex, Gloucester, Hanover, King and Queen and 10 more | 4 hr |
Nearby
Severe Thunderstorm Watches in West Virginia, 2004Severe Thunderstorm Watches in Pennsylvania, 2004Severe Thunderstorm Watches in Ohio, 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.