Alert archive / Maryland / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 291

May 25, 20044 states

The Storm Prediction Center issued this severe thunderstorm watch at May 25, 2004, 7:25 PM EDT for 4 states. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
May 25, 2004, 7:25 PM EDT (23:25 UTC)
Expired
May 25, 2004, 11:00 PM EDT
In force
4 hr
Issued by
the Storm Prediction Center
All 31 counties

Kent County, DE, New Castle County, DE, Sussex County, DE, Anne Arundel County, MD, Calvert County, MD, Caroline County, MD, Cecil County, MD, Charles County, MD, Dorchester County, MD, Kent County, MD, Queen Anne's County, MD, Saint Mary's County, MD, Somerset County, MD, Talbot County, MD, Wicomico County, MD, Worcester County, MD, Atlantic County, NJ, Cape May County, NJ, Cumberland County, NJ, Salem County, NJ, Accomack County, VA, Caroline County, VA, Essex County, VA, Hanover County, VA, King and Queen County, VA, King George County, VA, King William County, VA, Lancaster County, VA, Northumberland County, VA, Richmond County, VA, Westmoreland County, VA

Warnings issued inside it

10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
May 25, 7:41 PM EDTSevere Thunderstorm WarningLWXAnne Arundel49 min
May 25, 7:46 PM EDTSevere Thunderstorm WarningPHICecil, Kent59 min
May 25, 8:14 PM EDTSevere Thunderstorm WarningPHINew Castle61 min
May 25, 8:25 PM EDTSevere Thunderstorm WarningPHIQueen Anne's35 min
May 25, 8:36 PM EDTSevere Thunderstorm WarningPHIKent54 min
May 25, 9:04 PM EDTSevere Thunderstorm WarningPHIQueen Anne's26 min
May 25, 9:09 PM EDTSevere Thunderstorm WarningLWXCharles51 min
May 25, 9:16 PM EDTSevere Thunderstorm WarningLWXCalvert59 min
May 25, 9:22 PM EDTSevere Thunderstorm WarningPHISussex68 min
May 25, 9:30 PM EDTSevere Thunderstorm WarningPHIKent30 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, 11.4 hours before the alert went out and 113 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.

Skew-T log-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2004-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 19 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2004-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
19 J/kg
Mixed-layer CIN
-224 J/kg
Mixed-layer LCL
1534 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 25, 6:09 PM EDTMesoscale DiscussionSPCNew Castle2 hr
May 25, 2:58 PM EDTMesoscale DiscussionSPCAllegany, Garrett, Washington92 min
May 25, 3:20 PM EDTSevere Thunderstorm WatchSPCAllegany, Carroll, Frederick, Garrett, Howard, Montgomery and 1 more6 hr

Nearby

Severe Thunderstorm Watches in Maryland, 2004Severe Thunderstorm Watches in Virginia, 2004Severe Thunderstorm Watches in New Jersey, 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.