Alert archive / Michigan / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 2, NWS Marquette, MI

August 27, 1990Alger County, Schoolcraft County, Michigan

NWS Marquette, MI issued this severe thunderstorm warning at Aug 27, 1990, 4:46 PM EDT for Alger County, Schoolcraft County, Michigan. It was in force for 59 min.

The area

The counties it named.

The facts

Issued
Aug 27, 1990, 4:46 PM EDT (20:46 UTC)
Expired
Aug 27, 1990, 5:45 PM EDT
In force
59 min
Issued by
NWS Marquette, MI
Area
Whole counties

Counties Alger County, MI, Schoolcraft 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

Sault Ste Marie, MI (KSSM), launched 12:00Z, 8.8 hours before the alert went out and 160 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, Sault Ste Marie, MI at 12:00Z on 1990-08-27Temperature 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, Sault Ste Marie, MI at 12:00Z on 1990-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1198 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
100 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMQT 272046
SVRMQT
MIC003-153-272145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE MARQUETTE MI
446 PM EDT MON AUG 27 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 545 PM EDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE NORTH CENTRAL PART OF UPPER MICHIGAN
      SOUTHERN ALGER...

   IN THE SOUTHEAST PART OF UPPER MICHIGAN
      NORTHERN SCHOOLCRAFT...

AT 430 PM EDT A SEVERE THUNDERSTORM WAS INDICATED BY MARQUETTE
RADAR NEAR SHINGLETON (45 MILES EAST OF MARQUETTE). THIS STORM
IS MOVING EAST AT 25 MILES AN HOUR.

HEAVY RAIN...STRONG GUSTY WIND AND LARGE HAIL IS POSSIBLE IN THIS
STORM.

IF YOU ARE IN| AN AREA THREATENED BY THE STORM..GO TO A REINFORECED
SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY
RAIN AND 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.