Alert archive / Michigan / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 85, NWS Detroit, MI

July 21, 1998Monroe County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Jul 21, 1998, 8:12 AM EDT for Monroe County, Michigan. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 21, 1998, 8:12 AM EDT (12:12 UTC)
Expired
Jul 21, 1998, 8:45 AM EDT
In force
33 min
Issued by
NWS Detroit, MI
Area
Whole counties

County Monroe County, MI

The radar

The Detroit radar (KDTX), 87 km from the middle of the area, began a volume at 12:15 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 0.2 hours before the alert went out and 89 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 1998-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 27 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, Detroit, MI at 12:00Z on 1998-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 123 square meters per square second.19395878Sfc1 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
27 J/kg
Mixed-layer CIN
-328 J/kg
Mixed-layer LCL
2116 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
123 m²/s²
0-3 km storm-relative helicity
130 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 21, 7:24 AM EDTTornado WarningDTXWashtenaw66 min
Jul 21, 7:32 AM EDTSevere Thunderstorm WarningDTXLenawee58 min
Jul 21, 5:23 PM EDTSevere Thunderstorm WarningDTXLivingston37 min
Jul 21, 5:33 PM EDTSevere Thunderstorm WarningDTXWashtenaw57 min
Jul 21, 5:38 PM EDTSevere Thunderstorm WarningDTXLenawee57 min
Jul 21, 5:48 PM EDTSevere Thunderstorm WarningDTXOakland42 min
Jul 21, 5:56 PM EDTSevere Thunderstorm WarningDTXMonroe, Wayne64 min
Jul 21, 5:56 PM EDTSevere Thunderstorm WarningDTXMacomb64 min
Jul 21, 6:39 PM EDTSevere Thunderstorm WarningDTXSaint Clair31 min

Nearby

Severe Thunderstorm Warnings in Michigan, 1998Every severe thunderstorm warning in 1998

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; radar from the NEXRAD Level II archive.