Alert archive / Maryland / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 9, NWS Baltimore/Washington

July 20, 1986Cecil County, Harford County, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Jul 20, 1986, 6:53 PM EDT for Cecil County, Harford County, Maryland. It was in force for 67 min.

The area

The counties it named.

The facts

Issued
Jul 20, 1986, 6:53 PM EDT (22:53 UTC)
Expired
Jul 20, 1986, 8:00 PM EDT
In force
67 min
Issued by
NWS Baltimore/Washington
Area
Whole counties

Counties Cecil County, MD, Harford County, MD

The radar

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

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 10.9 hours before the alert went out and 129 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 1986-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 932 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 1986-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 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
932 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
519 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
96 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 20, 6:11 PM EDTSevere Thunderstorm WarningLWXBaltimore, City of Baltimore64 min
Jul 20, 6:11 PM EDTSevere Thunderstorm WarningLWXCarroll64 min
Jul 20, 6:11 PM EDTSevere Thunderstorm WarningLWXHarford64 min
Jul 20, 6:53 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, City of Baltimore67 min
Jul 20, 6:53 PM EDTSevere Thunderstorm WarningLWXKent, Queen Anne's67 min
Jul 20, 6:53 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll, Howard67 min

Nearby

Severe Thunderstorm Warnings in Maryland, 1986Every severe thunderstorm warning in 1986

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.