Alert archive / Michigan / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 22, NWS Gaylord, MI

September 6, 1990Muskegon County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Sep 6, 1990, 8:07 PM EDT for Muskegon County, Michigan. It was in force for 68 min.

The area

The counties it named.

The facts

Issued
Sep 6, 1990, 8:07 PM EDT (00:07 UTC)
Expired
Sep 6, 1990, 9:15 PM EDT
In force
68 min
Issued by
NWS Gaylord, MI
Area
Whole counties

County Muskegon 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.1 hours before the alert went out and 206 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, Green Bay/Straub, WI at 00:00Z on 1990-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 48 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, Green Bay/Straub, WI at 00:00Z on 1990-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -81 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
48 J/kg
Mixed-layer CIN
-392 J/kg
Mixed-layer LCL
936 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
-81 m²/s²
0-3 km storm-relative helicity
428 m²/s²
Significant tornado parameter
0.0
Supercell composite
-3.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KGRR 070008
SVRMKG
MIC121-070115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MUSKEGAN
ISSUED BY GRAND RAPIDS MI
807 PM EDT THU SEP 6 1990
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  915 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN WEST CENTRAL MICHIGAN
          ...SOUTHERN MUSKEGON
 
RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS OVER SOUTHERN MUSKEGON
COUNTY. THE THUNDERSTORMS ARE MOVING EAST AT 40 MPH.
 
 
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING. PERSONS IN THE WARNING AREA
SHOULD GET INTO A REINFORCED SHELTER AND PREPARE FOR STRONG
WINDS...LARGE HAIL...VERY HEAVY RAIN AND DEADLY LIGHTNING.

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.