Alert archive / Michigan / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 37, NWS Gaylord, MI

July 20, 1994Muskegon County, Newaygo County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Jul 20, 1994, 4:48 AM EDT for Muskegon County, Newaygo County, Michigan. It was in force for 42 min.

The area

The counties it named.

The facts

Issued
Jul 20, 1994, 4:48 AM EDT (08:48 UTC)
Expired
Jul 20, 1994, 5:30 AM EDT
In force
42 min
Issued by
NWS Gaylord, MI
Area
Whole counties

Counties Muskegon County, MI, Newaygo County, MI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 8.8 hours before the alert went out and 207 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 1994-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1567 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 1994-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 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
1567 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
933 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.7

Open this sounding in Storm Lab

The text

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

000 
WUUS1 KMKG 200848 RRA
SVRMKG
MIC121-123-200930-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MUSKEGON MI
448 AM EDT WED JUL 20 1994
 
THE NATIONAL WEATHER SERVICE IN MUSKEGON MI  HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  530 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN WEST CENTRAL LOWER MICHIGAN
 
   ...EASTERN MUSKEGON COUNTY...NEWAYGO COUNTY
 
 
AT 445 AM EDT... WEATHER RADAR SHOWED A LINE OF SEVERE THUNDERSTORMS
EXTENDING FROM HESPIRIA... 25 MILES NORTH OF MUSKEGON ... TO SULLIVAN
... 10 MILES EAST OF MUSKEGON. THE LINE OF SEVERE THUNDERSTORMS WAS
MOVING TO THE EAST AT 45 MILES AN HOUR AND WILL REACH FREMONT BY 455
AM... WHITE CLOUD BY 5 AM... AND SLOCUM BY 5 AM.
 
EXTREME LIGHTNING WITH FIRES WERE REPORTED. STRONG WINDS TO 60 MILES
AN HOUR AND LARGE HAIL ARE POSSIBLE WITH THIS LINE OF SEVERE
THUNDERSTORMS.
JSB
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 3:55 AM EDTSevere Thunderstorm WarningAPXMuskegon, Oceana65 min
Jul 20, 5:26 AM EDTSevere Thunderstorm WarningAPXMecosta34 min

Nearby

Severe Thunderstorm Warnings in Michigan, 1994Every severe thunderstorm warning in 1994

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.