Alert archive / Michigan / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 45, NWS Detroit, MI
NWS Detroit, MI issued this severe thunderstorm warning at Sep 7, 1990, 1:45 AM EDT for Wayne County, Michigan. It was in force for 30 min.
The area
The counties it named.
The facts
- Issued
- Sep 7, 1990, 1:45 AM EDT (05:45 UTC)
- Expired
- Sep 7, 1990, 2:15 AM EDT
- In force
- 30 min
- Issued by
- NWS Detroit, MI
- Area
- Whole counties
County Wayne County, MI
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
Detroit, MI (KFNT), launched 00:00Z, 5.8 hours before the alert went out and 50 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
- 629 J/kg
- Mixed-layer CIN
- -150 J/kg
- Mixed-layer LCL
- 1059 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.8
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Sep 6, 7:45 PM EDT, 6 hours before
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</html>The office that day
Everything else NWS Detroit, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 8:23 PM EDT | Severe Thunderstorm Warning | DTX | Macomb, Oakland | 67 min |
| Sep 6, 8:23 PM EDT | Severe Thunderstorm Warning | DTX | Livingston | 67 min |
| Sep 6, 8:38 PM EDT | Severe Thunderstorm Warning | DTX | Washtenaw, Wayne | 67 min |
| Sep 6, 9:42 PM EDT | Tornado Warning | DTX | Wayne | 33 min |
| Sep 6, 10:21 PM EDT | Severe Thunderstorm Warning | DTX | Washtenaw, Wayne | 69 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 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; the sounding from the Mesonet's radiosonde archive.