Alert archive / Michigan / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 9, NWS Gaylord, MI

August 5, 1989Manistee County, Mason County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Aug 5, 1989, 12:06 AM EDT for Manistee County, Mason County, Michigan. It was in force for 39 min.

The area

The counties it named.

The facts

Issued
Aug 5, 1989, 12:06 AM EDT (04:06 UTC)
Expired
Aug 5, 1989, 12:45 AM EDT
In force
39 min
Issued by
NWS Gaylord, MI
Area
Whole counties

Counties Manistee County, MI, Mason 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, 4.1 hours before the alert went out and 145 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 1989-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3204 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 1989-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 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
3204 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
1215 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMKG 050407
SVRMKG
MIC101-105-127-121-050515-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MUSKEGON MI
1206 AM EDT SAT AUG 5 1989

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
AND SPECIAL MARINE WARNING EFFECTIVE UNTIL 115 AM EDT FOR
PEOPLE IN THE FOLLOWING COUNTIES

   IN THE NORTHWEST PART OF LOWER MICHIGAN
      SOUTHWEST MANISTEE...

   IN THE WEST CENTRAL PART OF LOWER MICHIGAN
      MASON...OCEANA...NORTHWEST MUSKEGON...

...THIS WARNING ALSO INCLUDES THE ADJACENT COASTAL WATERS FOR THE
COUNTIES JUST MENTIONED

AT  1150PM WEATHER RADAR INDICATED AN AREA OF SEVERE THUNDERSTORM
S FROM NEAR MANISTEE TO SOUTHWEST OF HART AT LITTLE SABLE POINT.
THESE THUNDERSTORMS CONTINUE TO MOVE TO THE SOUTHEAST AT ABOUT
30 MILES AN HOUR AND WILL BE ENTERING NORTHERN MUSKEGON COUNTY
BY 1220AM.

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

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Aug 4, 8:29 PM EDT, 3 hours 37 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUGHTON LAKE MI
825 PM EDT FRI AUG 4 1989

AT 815 PM EDT...RADAR INDICATED AN AREA OF SHOWERS AND
THUNDERSTORMS MOVING INTO OTSEGO COUNTY IN NORTH CENTRAL
MICHIGAN.

THE SHOWERS AND THUNDERSTORMS WERE LOCATED 50 MILES NORTHWEST
OF HOUGHTON LAKE OR 15 MILES WEST OF GAYLORD.

THE THUNDERSTORMS WERE MOVING EAST SOdUTHEAST AT AROUND 25 MILES AN
HOUR AND WILL LIKELY PRODUCE HEAVY RAIN...GUSTY WINDS AND DANGEROUS
LIGHTNING AND HAIL.
Special weather statement, Aug 4, 9:17 PM EDT, 2 hours 49 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUGHTON LAKE MI
915 PM EDT FRI AUG 4 1989

AT 910 PM EDT...RADAR INDICATED THUNDERSTORMS MOVING THROUGH
CRAWFORD COUNTY IN NORTH CENTRAL MICHIGAN.

THE THUNDERSTORMS WERE LOCATED 20 MILES NORTHWEST OF HOUGHTON
LAKE OR 7 MILES NORTHWEST OF GRAYLING MOVING EAST SOUTHEAST
AT 25 MILES AN HOUR.

THE THUNDERSTORMS WILL LIKELY PRODUCE STRONG GUSTY WINDS...HAIL AND
DANGEROUS LIGHTNING.

THERE ARE NO TORNADO WATCHES IN EFFECT IN MICHIGAN.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 9:18 PM EDTSevere Thunderstorm WarningAPXMontmorency42 min
Aug 4, 9:45 PM EDTSevere Thunderstorm WarningAPXAlpena31 min
Aug 4, 9:57 PM EDTSevere Thunderstorm WarningAPXMissaukee, Wexford63 min
Aug 4, 11:18 PM EDTSevere Thunderstorm WarningAPXManistee, Mason57 min
Aug 5, 12:06 AM EDTSevere Thunderstorm WarningAPXMuskegon, Oceana69 min
Aug 5, 4:45 PM EDTSevere Thunderstorm WarningAPXChippewa, Luce60 min

Nearby

Severe Thunderstorm Warnings in Michigan, 1989Every severe thunderstorm warning in 1989

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.