Alert archive / Michigan / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 18, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Aug 2, 1993, 12:54 AM EDT for Ionia County, Montcalm County, Michigan. It was in force for 49 min.
The area
The counties it named.
The facts
- Issued
- Aug 2, 1993, 12:54 AM EDT (04:54 UTC)
- Expired
- Aug 2, 1993, 1:43 AM EDT
- In force
- 49 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Whole counties
Counties Ionia County, MI, Montcalm County, MI
The nearest sounding before it
Detroit, MI (KFNT), launched 00:00Z, 4.9 hours before the alert went out and 144 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
- 1515 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 996 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -0.3
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 Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 12:54 AM EDT | Severe Thunderstorm Warning | GRR | Kent | 51 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 1993Every severe thunderstorm warning in 1993
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.