Alert archive / Michigan / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 5, NWS Gaylord, MI
NWS Gaylord, MI issued this severe thunderstorm warning at Aug 4, 1989, 9:45 PM EDT for Alpena County, Michigan. It was in force for 31 min.
The area
The counties it named.
The facts
- Issued
- Aug 4, 1989, 9:45 PM EDT (01:45 UTC)
- Expired
- Aug 4, 1989, 10:16 PM EDT
- In force
- 31 min
- Issued by
- NWS Gaylord, MI
- Area
- Whole counties
County Alpena 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 00:00Z, 1.8 hours before the alert went out and 169 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.
- Mixed-layer CAPE
- 819 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 1330 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, 1 hour 16 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, 28 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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 9:18 PM EDT | Severe Thunderstorm Warning | APX | Montmorency | 42 min |
| Aug 4, 9:57 PM EDT | Severe Thunderstorm Warning | APX | Missaukee, Wexford | 63 min |
| Aug 4, 11:18 PM EDT | Severe Thunderstorm Warning | APX | Manistee, Mason | 57 min |
| Aug 5, 12:06 AM EDT | Severe Thunderstorm Warning | APX | Muskegon, Oceana | 69 min |
| Aug 5, 12:06 AM EDT | Severe Thunderstorm Warning | APX | Manistee, Mason | 39 min |
| Aug 5, 4:45 PM EDT | Severe Thunderstorm Warning | APX | Chippewa, Luce | 60 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.