Alert archive / Michigan / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 13, NWS Gaylord, MI

October 14, 1989Alcona County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Oct 14, 1989, 12:39 PM EDT for Alcona County, Michigan. It was in force for 51 min.

The area

The counties it named.

The facts

Issued
Oct 14, 1989, 12:39 PM EDT (16:39 UTC)
Expired
Oct 14, 1989, 1:30 PM EDT
In force
51 min
Issued by
NWS Gaylord, MI
Area
Whole counties

County Alcona 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, 4.7 hours before the alert went out and 209 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 1989-10-14Temperature 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 1989-10-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 216 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
2253 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
216 m²/s²
0-3 km storm-relative helicity
275 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 KAPN 141639
SVRAPN
MIC001-141745-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING 
NATIONAL WEATHER SERVICE ALPENA MI
1239 PM EDT SAT OCT 14 1989

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
AND SPECIAL MARINE WARNING EFFECTIVE UNTIL 145 PM EDT FOR 
PEOPLE IN THE FOLLOWING COUNTY

   IN THE NORTHEAST PART OF LOWER MICHIGAN
      NORTHERN ALCONA

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

AT 1230 PM EDT A SEVERE THUNDERSTORM WAS LOCATED OVER NORTHCENTRAL
ALCONA COUNTY...15 MILES SOUTH SOUTHWEST OF THE CITY OF ALPENA.
THIS STORM WAS MOVING TO THE EAST AT 50 MILES AN HOUR AND HAS
PRODUCED SEVERE WEATHER.

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.

 BOATERS ALONG THE LAKE HURON SHORELINE FROM OSSINEKE SOUTH TO
 HARRISVILLE SHOULD SEEK SAFE HARBOR IMMEDIATELY.
 THE SEVERE THUNDERSTORM WARNINGS FOR NORTHEAST OSCODA COUNTY AND FOR
 THE SOUTHERN PORTION OF ALCONA AND NORTH IOSCO COUNTIES IS CANCELLED.

KAMINSKE

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, Oct 14, 10:36 AM EDT, 2 hours 3 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUGHTON LAKE MI
1035 AM EDT SAT OCT 14 1989

...STRONG THUNDERSTORM MOVING INTO CRAWFORD COUNTY...

AT 1030 AM EDT RADAR INDICATED A STRONG THUNDERSTORM MOVING INTO
CRAWFORD COUNTY. THE STORM WAS LOCATED 20 MILES NORTHWEST OF
HOUGHTON LAKE OR 10 MILES NORTHWEST OF GRAYLING MOVING EAST AT 20
MILES AN HOUR.

HEAVY RAIN...GUSTY WINDS AND DANGEROUS LIGHTNING ARE LIKELY WITH
THE PASSAGE OF TH+IS THUNDERSTORM.
Special weather statement, Oct 14, 11:22 AM EDT, 1 hour 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUGHTON LAKE MI
1120 AM EDT SAT OCT 14 1989

...STRONG THUNDERSTORM MOVING THROUGH OTSEGO COUNTY...

AT 1115 AM EDT RADAR INDICATED A STRONG THUNDERSTORM MOVING
THROUGH OTSEGO COUNTY. THE STORM WAS LOCATED 30 MILES NORTHWEST OF
HOUGHTON LAKE OR OR JUST WEST OF OTSEGO LAKE MOVING EAST AT 20 MILES
AN HOUR.

HEAVY RAIN...GUSTY WINDS AND DANGEROUS LIGHTNING AND HAIL ARE LIKELY
WITH THIS THUNDERSTORM.

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 14, 11:56 AM EDTSevere Thunderstorm WarningAPXAlcona, Iosco34 min
Oct 14, 12:16 PM EDTSevere Thunderstorm WarningAPXAlcona, Oscoda59 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.