Alert archive / Michigan / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 31, NWS Gaylord, MI

July 12, 1987Alpena County, Presque Isle County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Jul 12, 1987, 5:41 PM EDT for Alpena County, Presque Isle County, Michigan. It was in force for 49 min.

The area

The counties it named.

The facts

Issued: Jul 12, 1987, 5:41 PM EDT (21:41 UTC)
Expired: Jul 12, 1987, 6:30 PM EDT
In force: 49 min
Issued by: NWS Gaylord, MI
Area: Whole counties

Counties Alpena County, MI, Presque Isle 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, 9.7 hours before the alert went out and 147 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 44 J/kg
Mixed-layer CIN: -493 J/kg
Mixed-layer LCL: 1000 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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, Jul 12, 2:43 PM EDT, 2 hours 58 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ALPENA MI
237 PM EDT SUN JUL 12 1987

...TORNADO WATCH NUMBER 374 IS IN EFFECT UNTIL 1100 EDT TONIGHT...
A TORNADO WATCH IS IN EFFECT FOR THE EAST END OF UPPER MICHIGAN AND
ALL OF LOWER MICHIGAN INCLUDING THE COASTAL WATERS OF LAKE HURON AND
LAKE MICHIGAN.

SEVERE THUNDERSTORM WATCH NUMBER 372 IS NO LONGER IN EFFECT.

ALTHOUGH NO SEVERE WEATHER HAS BEEN OBSERVED OR REPORTED OVER
NORTHEAST LOWER MICHIGAN...CONDITIONS EXIST IN WHICH SEVERE WEATHER
COULD OCCUR.

STAY TUNED TO THE NOAA WEATHER RAIDO OR TO YOUR LOCAL COMMERCIAL TV
OR RADIO STATION FOR THE LATEST DEVELOPMENTS CONCERNING THIS WATCH
AREA.

Special weather statement, Jul 12, 3:03 PM EDT, 2 hours 38 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAULT STE MARIE MI
300 PM EDT SUN JUL 12 1987

...TORNADO WATCH IN EFFECT UNTIL 1100 PM EDT...
...SEVERE THUNDERSTORM WARNING AND SPECIAL MARINE WARNING FOR
   MACKINAW COUNTY CANCELLED...

THE SEVERE THUNDERSTORM WARNING IN EFFECT FOR EASTERN CHIPPEWA
COUNTY HAS BEEN CANCELLED.  HOWEVER A TORNADO WATCH IS IN EFFECT
UNTIL 1100 PM EDT FOR MACKINAW..CHIPPEWA AND LUCE COUNTIES AS WELL
OF ALL OF LOWER MICHIGAN. ONE HALF INCH HAIL AND WINDS GUSTING TO
AROUND 40 MPH WAS REPORTED AT 215 PM EDT IN THE DAFTER AREA
...APPROXIMATELY 10 MILES SOUTH OF SAULT STE MARIE MICHIGAN. THE AREA
OF THUNDERSTORMS HAS MOVED NORTHEAST INTO CANADA. RADAR DOES SHOW
ANOTHER LINE OF THUNDERSTORMS JUST EAST OF MARQUETTE EXTENDING SOUTH.
THESE STORMS ARE MOVING NORTHEAST AND SHOWING SIGNS OF INTENSIFING.

MAS

Special weather statement, Jul 12, 3:11 PM EDT, 2 hours 30 minutes before

SPECIAL WEATHER STATEMENT...CORRECTION...
NATIONAL WEATHER SERVICE SAULT STE MARIE MI
300 PM EDT SUN JUL 12 1987

...TORNADO WATCH IN EFFECT UNTIL 1100 PM EDT...
...SEVERE THUNDERSTORM WARNING AND SPECIAL MARINE WARNING FOR
   CHIPPEWA COUNTY CANCELLED...

THE SEVERE THUNDERSTORM WARNING IN EFFECT FOR EASTERN CHIPPEWA
COUNTY HAS BEEN CANCELLED.  HOWEVER A TORNADO WATCH IS IN EFFECT
UNTIL 1100 PM EDT FOR MACKINAW..CHIPPEWA AND LUCE COUNTIES AS WELL
OF ALL OF LOWER MICHIGAN. ONE HALF INCH HAIL AND WINDS GUSTING TO
AROUND 40 MPH WAS REPORTED AT 215 PM EDT IN THE DAFTER AREA
...APPROXIMATELY 10 MILES SOUTH OF SAULT STE MARIE MICHIGAN. THE AREA
OF THUNDERSTORMS HAS MOVED NORTHEAST INTO CANADA. RADAR DOES SHOW
ANOTHER LINE OF THUNDERSTORMS JUST EAST OF MARQUETTE EXTENDING SOUTH.
THESE STORMS ARE MOVING NORTHEAST AND SHOWING SIGNS OF INTENSIFING.

MAS

Special weather statement, Jul 12, 4:35 PM EDT, 1 hour 6 minutes before

SPECIAL WEATHER STATEMENT...CORRECTION...
NATIONAL WEATHER SERVICE SAULT STE MARIE MI
300 PM EDT SUN JUL 12 1987

...TORNADO WATCH IN EFFECT UNTIL 1100 PM EDT...
...SEVERE THUNDERSTORM WARNING AND SPECIAL MARINE WARNING FOR
   EASTERN CHIPPEWA COUNTY..NORTHERN LAKE HURON AND LAKE MICHIGAN
   INCLUDING THE STRAITS AREA AND MACKINAW BRIDGE IN EFFECT UNTIL
   500 PM EDT.

THUNDERSTORMS CONTINUE TO DEVELOP AND MOVE NORTHEAST ACROSS EASTERN
UPPER MICHIGAN AND THE MACKINAW BRIDGE AREA.  AT 430 PM DETOUR MARINA
IN EASTERN UPPER MICHIGAN REPORTED PEA SIZE HAIL WITH WINDS GUSTING
TO 55 AND 60 MPH. OTHER REPORTS OF HAIL HAVE BEEN REPORTED THROUGHOUT
EASTERN UPPER MICHIGAN RANGING IN SIZE FROM PEA SIcZE TO THUMB NAIL
SIZE.  ALL THUNDERSTORMS WERE MOVING NORTHEAST AT APPROXIMATELY 25 TO
30 MPH.

SHNOWSKI

Special weather statement, Jul 12, 4:36 PM EDT, 1 hour 5 minutes before

SPECIAL WEATHER STATEMENT...CORRECTION...
NATIONAL WEATHER SERVICE SAULT STE MARIE MI
440 PM EDT SUN JUL 12 1987

...TORNADO WATCH IN EFFECT UNTIL 1100 PM EDT...
...SEVERE THUNDERSTORM WARNING AND SPECIAL MARINE WARNING FOR
   EASTERN CHIPPEWA COUNTY..NORTHERN LAKE HURON AND LAKE MICHIGAN
   INCLUDING THE STRAITS AREA AND MACKINAW BRIDGE IN EFFECT UNTIL
   500 PM EDT.

THUNDERSTORMS CONTINUE TO DEVELOP AND MOVE NORTHEAST ACROSS EASTERN
UPPER MICHIGAN AND THE MACKINAW BRIDGE AREA.  AT 430 PM DETOUR MARINA
IN EASTERN UPPER MICHIGAN REPORTED PEA SIZE HAIL WITH WINDS GUSTING
TO 55 AND 60 MPH. OTHER REPORTS OF HAIL HAVE BEEN REPORTED THROUGHOUT
EASTERN UPPER MICHIGAN RANGING IN SIZE FROM PEAd SIZE TO THUMB NAIL
SIZE.  ALL THUNDERSTORMS WERE MOVING NORTHEAST AT APPROXIMATELY 25 TO
30 MPH.

SHNOWSKI

Special weather statement, Jul 12, 5:33 PM EDT, 8 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 2:15 PM EDT	Severe Thunderstorm Warning	APX	Chippewa	45 min
Jul 12, 4:15 PM EDT	Severe Thunderstorm Warning	APX	Chippewa	45 min
Jul 12, 4:50 PM EDT	Tornado Warning	APX	Chippewa	25 min
Jul 12, 5:12 PM EDT	Severe Thunderstorm Warning	APX	Alpena, Presque Isle	63 min
Jul 12, 5:12 PM EDT	Severe Thunderstorm Warning	APX	Montmorency	38 min
Jul 12, 5:15 PM EDT	Severe Thunderstorm Warning	APX	Chippewa	45 min

Nearby

Severe Thunderstorm Warnings in Michigan, 1987 Every severe thunderstorm warning in 1987

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.