Alert archive / Michigan / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 34, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Sep 26, 1986, 4:30 PM EDT for Allegan County, Van Buren County, Michigan. It was in force for 30 min.
The area
The counties it named.
The facts
- Issued
- Sep 26, 1986, 4:30 PM EDT (20:30 UTC)
- Expired
- Sep 26, 1986, 5:00 PM EDT
- In force
- 30 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Whole counties
Counties Allegan County, MI, Van Buren 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
Detroit, MI (KFNT), launched 12:00Z, 8.5 hours before the alert went out and 222 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
- 2111 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 620 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 3.4
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, Sep 26, 10:53 AM EDT, 5 hours 37 minutes before
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</html>Special weather statement, Sep 26, 11:12 AM EDT, 5 hours 18 minutes before
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</html>Special weather statement, Sep 26, 12:21 PM EDT, 4 hours 9 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LANSING, MI
1214 PM EDT FRI SEP 26 1986
...STRONG THUNDERSTORM OVER CENTRAL LOWER MICHIGAN...
...FLASH FLOOD WATCH UNTIL 5 PM EDT...
AT 1210 PM EDT A STRONG THUNDERSTORM WAS MOVING OVER SOUTHERN
ISABELLA COUNTY. HEAVY RAIN IS LIKELY ACROSS SOUTHERN ISABELLA
COUNTY...MOSTLY SOUTH OF MOUNT PLEASANT...BETWEEN NOON AND 1 PM EDT.
A LARGE AREA OF RAIN WITH A FEW STRONG THUNDERSTORMS EXTENDED ACROSS
CENTRAL LOWER MICHIGAN. LOCALLY HEAVY RAIN IS POSSIBLE ACROSS THIS
AREA THROUGHOUT THIS AFTERNOON.
FORTUNESpecial weather statement, Sep 26, 2:15 PM EDT, 2 hours 15 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 210 PM EDT FRI SEP 26 1986 ...INTENSE THUNDERSTORMS MOVING TOWARD SOUTHWEST MICHIGAN... AT 2 PM WEATHER RADAR INDICATED AN AREA OF INTENSE THUNDERSTORMS MOVING OUT OF THE CHIGAGO..MILWAUKEE AREAS ONTO LAKE MICHIGAN. IN THE CHICAGO AREA THE THUNDERSTORMS PRODUCED VERY HEAVY RAIN.. REDUCING THE VISIBILITY TO NEAR ZERO..SMALL HAIL AND WIND GUSTS TO ABOUT 45 MPH. THE THUNDERSTORMS WERE MOVING NORTHEAST ABOUT 30 MPH AND SHOULD REACH THE BENTON HARBOR..SOUTH HAVEN..GRAND HAVEN AREAS BY 3 TO 4 PM. BOATERS ON LAKE MICHIGAN SHOULD CONSIDER HEADING FOR A SAFE PORT. PERSONS ON SHORE SHOULD BRACE FOR ANOTHER ONSLAUGHT OF HEAVY RAINv AND STRONG GUSTY WINDS. SOME LOCAL FLOODING IS LIKELY AS THE THUNDERSTORMS MOVE ACROSS SOUTHWEST MICHIGAN. THE THUNDERSTORMS WILL GENERATE FREQUENT LIGHTNING. LIGHTNING IS DEADLY..OBSERVE THE LIGHTNING SAFETY RULES. COOLEY
Special weather statement, Sep 26, 3:44 PM EDT, 46 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 330 PM EDT FRI SEP 26 1986 ...INTENSE THUNDERSTORMS MOVING ONSHORE IN SOUTHWEST MICHIGAN... AT 330 PM WEATHER RADAR INDICATED AN AREA OF THUNDERSTORMS MOVING ONSHORE FROM SOUTH BEND TO HOLLAND AND INLAND TO SPARTA. THE THUNDERSTORMS RANGE FROM HEAVY TO VERY HEAVY INTENSITY. SCATTERED RAINFALL AMOUNTS WITH THESE THUNDERSTORMS COULD RANGE UP TO AN INCH OR TWO. HEAVY RAIN COULD REDUCE VISIBILITY TO NEAR ZERO IN SOME AREAS. HEAVY RAIN COULD ALSO PRODUCE TEMPORARY FLOODING OF LOW SPOTS INCLUDING LOW ROADS AND INTERSECTIONS. ALLOW EXTRA TIME TO REACH YOUR DESTINATION AND DRIVE SAFELY. LIGHTNING WILL ACCOMPANY THESE THUNDERSTORMS. LIGHTNING IS DEADLY.. OBSERVE THE LIGHTNING SAFETY RULES. COOLEY
The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 26, 5:20 PM EDT | Tornado Warning | GRR | Kalamazoo | 31 min |
| Sep 26, 5:53 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun, Hillsdale | 52 min |
| Sep 26, 6:26 PM EDT | Severe Thunderstorm Warning | GRR | Jackson | 19 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 1986Every severe thunderstorm warning in 1986
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.