Alert archive / Michigan / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 6, NWS Detroit, MI

July 18, 1990Crawford County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Jul 18, 1990, 8:55 AM EDT for Crawford County, Michigan. It was in force for 65 min.

The area

The counties it named.

The facts

Issued
Jul 18, 1990, 8:55 AM EDT (12:55 UTC)
Expired
Jul 18, 1990, 10:00 AM EDT
In force
65 min
Issued by
NWS Detroit, MI
Area
Whole counties

County Crawford 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 12:00Z, 0.9 hours before the alert went out and 238 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, Detroit, MI at 12:00Z on 1990-07-18Temperature 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, Detroit, MI at 12:00Z on 1990-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 116 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
116 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 Detroit, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 18, 1:28 PM EDTSevere Thunderstorm WarningDTXGladwin32 min
Jul 18, 1:54 PM EDTSevere Thunderstorm WarningDTXArenac, Bay66 min
Jul 18, 3:13 PM EDTSevere Thunderstorm WarningDTXSanilac, Tuscola62 min
Jul 18, 3:39 PM EDTSevere Thunderstorm WarningDTXMidland46 min
Jul 18, 5:00 PM EDTSevere Thunderstorm WarningDTXGenesee, Tuscola45 min
Jul 18, 5:18 PM EDTTornado WarningDTXGenesee27 min
Jul 18, 6:00 PM EDTSevere Thunderstorm WarningDTXMacomb, Oakland, Saint Clair40 min
Jul 18, 6:00 PM EDTSevere Thunderstorm WarningDTXLivingston40 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.