Alert archive / Michigan / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 31, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Sep 10, 1986, 9:34 PM EDT for Kent County, Michigan. It was in force for 41 min.
The area
The counties it named.
The facts
- Issued
- Sep 10, 1986, 9:34 PM EDT (01:34 UTC)
- Expired
- Sep 10, 1986, 10:15 PM EDT
- In force
- 41 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Whole counties
County Kent 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 00:00Z, 1.6 hours before the alert went out and 176 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
- 200 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 661 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 247 m²/s²
- 0-3 km storm-relative helicity
- 307 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
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 10, 5:48 PM EDT, 3 hours 46 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 550 PM EDT WED SEP 10 1986 ...MINOR FLOODING CONTINUES TO BE A POSSIBLITY THIS AFTERNOON IN SOUTHWEST LOWER MICHIGAN AS SHOWERS AND THUNDERSTORMS CONTINUE... AT 540 PM EDT RADAR INDICATED A FEW INTENSE THUNDERSTORMS ONE LOCATED IN CALHOUN COUNTY JUST NORTH OF BATTLE CREEK ANOTHER LOCATED JUST OFF- SHORE OF SOUTHHAVEN MICHIGAN IN VAN BUREN COUNTY AND ANOTHER IN THE ALLEGAN COUNTY AREA OF SAUGATUCK. STILL ANOTHER STRONG CELL IS JUST TO THE NORTH OF GRAND RAPIDS. THESE STORMS CAN PRODUCE HEAVY RAIN, STRONG GUSTY WINDS..DANGEROUS LIGHTNING AND SOME SMALL HAIL. SOME STREET FLOODING IS OCCURING IN MANY AREAS OF SOUTHWEST LOWER MICHGAN AND WILL CONTINUE TO DO SO AS THESE STORMS CONTINUE TONIGHT. ALSO LOW LYING AREAS AND AND SMALL STREAMS MAY FLOOD DURING THE EVENING AND NIGHTTIME HOURS. PERSONS IN LOW LAND AREAS SHOULD BE ON THE ALERT FOR POSSIBLE MINOR FLOODING AND PERSONS DRIVING SHOULD WATCH FOR STREET FLOODING, ESPECIALLY UNDER OVERPASSES AND SLICK ROADS THIS AFTERNOON AND TONIGHT. PERSONS SHOULD NOT DRIVE VEHICLES INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT AND THE CAR MAY STVALL. THE SHOWERS AND THUNDERSTORMS WILL CONTINUE TONIGHT AND MOST OF THURSDAY AS A LOW PRESSURE AREA MOVES TOWARD THE GREAT LAKES OUT OF THE NORTHERN PLAINS STATES. DBS
Special weather statement, Sep 10, 5:58 PM EDT, 3 hours 36 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LANSING, MI 551 PM EDT WED SEP 10 1986 ...INTENSE THUNDERSTORM MOVING INTO NORTHERN CALHOUN AND SOUTHERN EATON COUNTIES... AT 550 PM EDT RADAR INDICATED AN INTENSE THUNDERSTORM 10 MILES NORTH OF BATTLE CREEK MOVING EAST AT 35 MPH. THIS THUNDERSTORM WILL MOVE ACROSS NORTHERN CALHOUN AND SOUTHERN EATON COUNTIES BETWEEN 551 PM AND 630 PM EDT. TORRENTIAL RAIN...FREQUENT LIGHTNING..AND STRONG WINDwS HAVE BEEN REPORTED WITH THIS STORM. PEOPLE IN BELLEVUE AND OLIVET ARE NEAR THE PATH OF THIS STRONG THUNDERSTORM. BE ALERT FOR RAPID FLOODING OF STREETS AND LOW-LYING AREAS AS THIS STORM PASSES. BUNTING
Special weather statement, Sep 10, 7:05 PM EDT, 2 hours 29 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 705 PM EDT WED SEP 10 1986 ...MINOR FLOODING CONTINUES TO BE A POSSIBLITY THIS EVENING AND TONIGHT.. IN SOUTHWEST LOWER MICHIGAN AS SHOWERS AND THUNDERSTORMS CONTINUE... AT 700 PM EDT KENT COUNTY SHERRIFF REPORTED PEA SIZE HAIL..STRONG GUSTY WINDS AND HEAVY RAIN IN THE PLAINFIELD AREA OF NORTHEAST GRAND RAPIDS. KRAFT ORCHARDS REPORTED STRONG GUSTY WINDS WITH MANY BRANCHES DOWN IN THUNDERSTORMS RUNNING THROUGH THAT NORTHWEST GRAND RAPIDS AREA ALONG WITH EXTREMELY HEAVY RAIN. THESE STORMS CAN PRODUCE HEAVY RAIN, STRONG GUSTY WINDS..DANGEROUS LIGHTNING AND SOME SMALL HAIL. SOME STREET FLOODING IS OCCURING IN MANY AREAS OF SOUTHWEST LOWER MICHGAN AND WILL CONTINUE TO DO SO AS THESE STORMS CONTINUE TONIGHT. ALSO LOW LYING AREAS AND AND SMALL STREAMS MAY FLOOD DURING THE EVENING AND NIGHTTIME HOURS. PERSONS SHOULD NOT DRIVE VEHICLES INTO AREAS WHERE THE WATER COVERS THE RO ADWAY. THE WATER DEPTH MAY BE TOO GREAT AND THE CAR MAY STALL. THE SHOWERS AND THUNDERSTORMS WILL CONTINUE TONIGHT AND MOST OF THURSDAY AS A LOW PRESSURE AREA MOVES TOWARD THE GREAT LAKES OUT OF THE NORTHERN PLAINS STATES. DBS
Special weather statement, Sep 10, 8:45 PM EDT, 49 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 845 PM EDT WED SEP 10 1986 ...HEAVY RAINFALL AMOUNTS IN SOUTHWEST LOWER MICHIGAN TODAY... AS OF 830 PM EDT..THE FOLLOWING 24 HOUR RAINFALL AMOUNTS HAVE BEEN REPORTED IN SOUTHWEST LOWER MICHIGAN... KENT COUNTY AIRPORT 3.22" SPARTA 7.83" PLAINFIELD 5.16" CANNONSBURG 5.90" PEACH RIDGE 5.33" ROCKFORD ~ 5.19" MJK
Special weather statement, Sep 10, 9:34 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MUSKEGON MI 925PM EDT WED SEP 10 1986 ..VERY STRONG THUNDERSTORMS ACROSS WESTERN MICHIGAN... THE SEVERE THUNDERSTORM WARNING FOR MUSKEGON AND NEWAGO COUNTIES EXPIRED AT 915PM EDT BUT A FLASH FLOOD WARNING IS NOW IN EFFECT UNTIL 1100PM EDT FOR THE NORTHERN HALF OF MUSKEGON AND SOUTHERN NEWAGO COUNTIES. AT 905PM EDT RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN FROM 50 MILES NORTHWEST TO 40 MILES NORTHEAST OF MUSKEGON. THESE STORMS CONTAIN VERY HEAVY RAIN AND WERE MOVING FROM WEST TO EAST AT ABOUT 35 MILES AN HOUR. THIS VERY HEAVY RAIN ON TOP OF THE OVER 4 INCHES RECEIVED ALREADY TODAY MAY CAUSE FLASH FLOODING IN PARTS OF MUSKEGON AND NEWAGO COUNTIES. STAY TUNED TO YOUR LOCAL RADIO OR TELEVISION STATIONS OR NOAA WEATHER RADIO FOR FURTHER STATEMENTS OR WARNINGS. END WSO MKG
The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 10:26 PM EDT | Flash Flood Warning | GRR | Kent | 3 hr |
| Sep 10, 11:07 PM EDT | Flash Flood Warning | GRR | Gratiot | 3 hr |
| Sep 10, 11:47 PM EDT | Flash Flood Warning | GRR | Montcalm | 4 hr |
| Sep 11, 1:11 AM EDT | Flash Flood Warning | GRR | Kent | 4 hr |
| Sep 11, 3:03 AM EDT | Flash Flood Warning | GRR | Montcalm | 4 hr |
| Sep 11, 5:05 AM EDT | Flash Flood Warning | GRR | Kent, Montcalm | 4 hr |
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.