Alert archive / Maryland / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 83, NWS Baltimore/Washington

July 28, 1997Charles County, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Jul 28, 1997, 7:10 PM EDT for Charles County, Maryland. It was in force for 35 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
Jul 28, 1997, 7:10 PM EDT (23:10 UTC)
Expired
Jul 28, 1997, 7:45 PM EDT
In force
35 min
Issued by
NWS Baltimore/Washington
Area
Whole counties

County Charles County, MD

The radar

The Sterling radar (KLWX), 69 km from the middle of the area, began a volume at 23:10 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.

IssuedProductOfficeLasted
Jul 28, 4:45 PM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.2 hours before the alert went out and 63 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 1997-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 405 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 1997-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -22 square meters per square second.1939Sfc1 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
405 J/kg
Mixed-layer CIN
-131 J/kg
Mixed-layer LCL
988 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-22 m²/s²
0-3 km storm-relative helicity
-1 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
Jul 28, 4:05 PM EDTSevere Thunderstorm WarningLWXFrederick, City of Winchester45 min
Jul 28, 4:25 PM EDTSevere Thunderstorm WarningLWXClarke45 min
Jul 28, 4:38 PM EDTSevere Thunderstorm WarningLWXLoudoun47 min
Jul 28, 4:47 PM EDTSevere Thunderstorm WarningLWXFauquier48 min
Jul 28, 5:32 PM EDTSevere Thunderstorm WarningLWXArlington33 min
Jul 28, 6:35 PM EDTSevere Thunderstorm WarningLWXStafford45 min
Jul 28, 3:03 PM EDTSevere Thunderstorm WarningLWXAllegany42 min
Jul 28, 3:55 PM EDTSevere Thunderstorm WarningLWXHampshire45 min

Nearby

Severe Thunderstorm Warnings in Maryland, 1997Every severe thunderstorm warning in 1997

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.