Alert archive / Michigan / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 21, NWS Detroit, MI

August 27, 1990Ogemaw County, Roscommon County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at Aug 27, 1990, 9:35 PM EDT for Ogemaw County, Roscommon County, Michigan. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Aug 27, 1990, 9:35 PM EDT (01:35 UTC)
Expired
Aug 27, 1990, 10:35 PM EDT
In force
60 min
Issued by
NWS Detroit, MI
Area
Whole counties

Counties Ogemaw County, MI, Roscommon 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, 1.6 hours before the alert went out and 195 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 00:00Z on 1990-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4800 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 00:00Z on 1990-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 183 square meters per square second.193958Sfc1 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
4800 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
869 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
183 m²/s²
0-3 km storm-relative helicity
312 m²/s²
Significant tornado parameter
6.1
Supercell composite
25.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KHTL 280135
SVRHTL
MIC129-143-280235-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HOUGHTON LAKE MI
935 PM EDT MON AUG 27 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 1035 PM  EDT FOR PEOPLE IN THE FOLLOWING
COUNTIES

    IN NORTH CENTRAL MICHIGAN
        ROSCOMMON AND OGEMAW        

AT 930 PM EDT...RADAR INDICATED NUMEROUS SEVERE THUNDERSTORMS MOVING
ACROSS ROSCOMMON AND OGEMAW COUNTIES. THESE STORM SHOULD CONTINUE FOR
AT LEAST THE NEXT HOUR. 

PEOPLE IN THE WARNED AREA SHOULD GET INTO A REINFORCED SHELTER AND
PREPARE FOR DAMAGING WINDS...LARGE HAIL...VERY HEAVY RAIN AND
DANGEROUS LIGHTNING.

The office that day

Everything else NWS Detroit, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 27, 8:00 PM EDTSevere Thunderstorm WarningDTXOtsego60 min
Aug 27, 8:10 PM EDTSevere Thunderstorm WarningDTXCrawford65 min
Aug 27, 8:40 PM EDTSevere Thunderstorm WarningDTXRoscommon60 min
Aug 27, 9:00 PM EDTSevere Thunderstorm WarningDTXRoscommon45 min
Aug 27, 9:10 PM EDTSevere Thunderstorm WarningDTXCrawford30 min
Aug 27, 9:17 PM EDTSevere Thunderstorm WarningDTXOgemaw60 min
Aug 27, 9:47 PM EDTSevere Thunderstorm WarningDTXArenac73 min
Aug 27, 10:00 PM EDTSevere Thunderstorm WarningDTXClare, Gladwin35 min
Aug 27, 10:22 PM EDTSevere Thunderstorm WarningDTXHuron53 min
Aug 27, 11:00 PM EDTSevere Thunderstorm WarningDTXClare, Gladwin60 min
Aug 27, 11:54 PM EDTSevere Thunderstorm WarningDTXBay, Midland66 min
Aug 28, 12:49 AM EDTSevere Thunderstorm WarningDTXMacomb, Saint Clair41 min
Aug 28, 5:42 PM EDTSevere Thunderstorm WarningDTXLenawee63 min
Aug 28, 6:00 PM EDTTornado WarningDTXMonroe45 min
Aug 28, 6:30 PM EDTSevere Thunderstorm WarningDTXWayne60 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.