Alert archive / Maryland / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 67, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Aug 13, 1990, 9:12 PM EDT for Caroline County, Kent County, Queen Anne's County, Maryland. It was in force for 63 min. 2 reports 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
- Aug 13, 1990, 9:12 PM EDT (01:12 UTC)
- Expired
- Aug 13, 1990, 10:15 PM EDT
- In force
- 63 min
- Issued by
- NWS Baltimore/Washington
- Area
- Whole counties
Counties Caroline County, MD, Kent County, MD, Queen Anne's 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 13, 9:30 PM EDT | Thunderstorm Wind 0 | Kent, MD | |
| Aug 13, 10:00 PM EDT | Thunderstorm Wind 0 | Caroline, 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
Atlantic City In, NJ (KACY), launched 00:00Z, 1.2 hours before the alert went out and 137 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.
- Mixed-layer CAPE
- 1164 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 1109 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.9
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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 8:21 PM EDT | Severe Thunderstorm Warning | LWX | Prince George's | 69 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.