Alert archive / Maryland / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 21, NWS Baltimore/Washington

May 2, 2004Harford County, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at May 2, 2004, 9:53 PM EDT for Harford County, Maryland. It was in force for 67 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 2, 2004, 9:53 PM EDT (01:53 UTC)
Expired: May 2, 2004, 11:00 PM EDT
In force: 67 min
Issued by: NWS Baltimore/Washington
Area: Counties, with a storm outline in the text

County Harford County, MD

What was reported inside it

Time	Report	Where	Remark
May 2, 10:05 PM EDT	TSTM WND DMG	Bel Air, MD	TREES AND POWERLINES DOWNED IN JOPPATOWNE AND BEL AIR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.9 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 401 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1159 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 195 m²/s²
0-3 km storm-relative helicity: 213 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

390 
WUUS51 KLWX 030153
SVRLWX
MDC025-030300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
953 PM EDT SUN MAY 2 2004

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR
  HARFORD COUNTY IN NORTHERN MARYLAND

* UNTIL 1100 PM EDT.

* AT 953 PM EDT SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WINDS UP TO
  60 MPH WERE LOCATED ALONG A LINE EXTENDING FROM 8 MILES WEST
  OF FALLSTON TO 6 MILES SOUTHWEST OF PLEASANT HILLS TO 17 MILES
  SOUTHWEST OF JOPPATOWNE...MOVING NORTHEAST AT 55 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...ABERDEEN...BEL AIR...FALLSTON...
  HAVRE DE GRACE...JARRETTSVILLE...PERRYMAN AND PLEASANT HILLS.

DAMAGING WINDS ARE LIKELY WITH THESE STORMS...MOVE TO A SAFE PLACE
NOW. MOBILE HOMES AND VEHICLES ARE ESPECIALLY SUSCEPTIBLE TO HIGH
WINDS AND MAY BE OVERTURNED.

LAT...LON 3958 7656 3944 7638 3930 7633 3948 7607
          3968 7619 3977 7632

$$
MANNING

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 2, 8:18 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	72 min
May 2, 8:25 PM EDT	Severe Thunderstorm Warning	LWX	Frederick	80 min
May 2, 9:02 PM EDT	Severe Thunderstorm Warning	LWX	Carroll	43 min
May 2, 9:16 PM EDT	Severe Thunderstorm Warning	LWX	Howard, Prince George's	44 min
May 2, 9:23 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore	52 min
May 2, 9:29 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, City of Baltimore	61 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2004 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.