Alert archive / Maryland / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 49, NWS Baltimore/Washington

July 5, 1990Carroll County, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Jul 5, 1990, 4:05 PM EDT for Carroll County, Maryland. It was in force for 40 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
Jul 5, 1990, 4:05 PM EDT (20:05 UTC)
Expired
Jul 5, 1990, 4:45 PM EDT
In force
40 min
Issued by
NWS Baltimore/Washington
Area
Whole counties

County Carroll County, MD

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Jul 5, 4:34 PM EDTThunderstorm Wind 52Carroll, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.1 hours before the alert went out and 76 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 1990-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1990-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -103 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
0 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
-103 m²/s²
0-3 km storm-relative helicity
65 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 5, 3:25 PM EDTSevere Thunderstorm WarningLWXBaltimore, Harford65 min
Jul 5, 3:26 PM EDTSevere Thunderstorm WarningLWXWashington64 min
Jul 5, 3:43 PM EDTSevere Thunderstorm WarningLWXFrederick62 min
Jul 5, 3:53 PM EDTSevere Thunderstorm WarningLWXCecil37 min
Jul 5, 7:38 PM EDTSevere Thunderstorm WarningLWXWorcester52 min
Jul 5, 5:00 PM EDTSevere Thunderstorm WarningLWXArlington, Fairfax60 min
Jul 5, 5:19 PM EDTSevere Thunderstorm WarningLWXClarke, Warren56 min
Jul 5, 5:33 PM EDTSevere Thunderstorm WarningLWXPrince William57 min

Nearby

Severe Thunderstorm Warnings in Maryland, 1990Every severe thunderstorm warning in 1990

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.