Alert archive / Maryland / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 99, NWS Baltimore/Washington

June 16, 1998Saint Mary's County, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 16, 1998, 7:16 PM EDT for Saint Mary's County, Maryland. It was in force for 49 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jun 16, 1998, 7:16 PM EDT (23:16 UTC)
Expired
Jun 16, 1998, 8:05 PM EDT
In force
49 min
Issued by
NWS Baltimore/Washington
Area
Whole counties

County Saint Mary's County, MD

What was reported inside it

TimeReportWhereRemark
Jun 16, 7:20 PM EDTThunderstorm WindMilestown, MD

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 16, 4:00 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 16, 4:15 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.3 hours before the alert went out and 111 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 1998-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 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 1998-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 square meters per square second.1939587897117Sfc1 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
5 J/kg
Mixed-layer CIN
-115 J/kg
Mixed-layer LCL
1062 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
118 m²/s²
0-3 km storm-relative helicity
112 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 16, 3:58 PM EDTSevere Thunderstorm WarningLWXAugusta, City of Staunton, City of Waynesboro62 min
Jun 16, 4:17 PM EDTSevere Thunderstorm WarningLWXAlbemarle, Greene, Madison48 min
Jun 16, 4:26 PM EDTSevere Thunderstorm WarningLWXAlbemarle, City of Charlottesville49 min
Jun 16, 4:29 PM EDTSevere Thunderstorm WarningLWXNelson31 min
Jun 16, 4:38 PM EDTSevere Thunderstorm WarningLWXRockingham, City of Harrisonburg47 min
Jun 16, 4:42 PM EDTSevere Thunderstorm WarningLWXCulpeper48 min
Jun 16, 5:02 PM EDTSevere Thunderstorm WarningLWXFauquier48 min
Jun 16, 5:12 PM EDTSevere Thunderstorm WarningLWXFauquier48 min
Jun 16, 5:27 PM EDTSevere Thunderstorm WarningLWXClarke, Loudoun, Prince William48 min
Jun 16, 5:34 PM EDTSevere Thunderstorm WarningLWXAlbemarle, Orange51 min
Jun 16, 5:38 PM EDTFlash Flood WarningLWXFauquier2 hr
Jun 16, 5:58 PM EDTSevere Thunderstorm WarningLWXAlbemarle, City of Charlottesville47 min
Jun 16, 6:14 PM EDTSevere Thunderstorm WarningLWXSpotsylvania51 min
Jun 16, 5:56 PM EDTSevere Thunderstorm WarningLWXFrederick, Montgomery49 min
Jun 16, 6:08 PM EDTTornado WarningLWXWashington32 min
Jun 16, 6:22 PM EDTSevere Thunderstorm WarningLWXFrederick, Washington48 min
Jun 16, 6:26 PM EDTSevere Thunderstorm WarningLWXBaltimore, Howard49 min
Jun 16, 6:33 PM EDTSevere Thunderstorm WarningLWXCarroll32 min
Jun 16, 6:55 PM EDTFlash Flood WarningLWXCarroll2 hr
Jun 16, 7:28 PM EDTSevere Thunderstorm WarningLWXCalvert32 min

Nearby

Severe Thunderstorm Warnings in Maryland, 1998Every severe thunderstorm warning in 1998

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.