Alert archive / Michigan / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 18, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jul 9, 1987, 12:51 PM EDT for Isabella County, Michigan. It was in force for 69 min.
The area
The counties it named.
The facts
- Issued
- Jul 9, 1987, 12:51 PM EDT (16:51 UTC)
- Expired
- Jul 9, 1987, 2:00 PM EDT
- In force
- 69 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Whole counties
County Isabella 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, 4.9 hours before the alert went out and 154 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
- 1043 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 612 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 9, 12:16 PM EDT, 35 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 1215 PM EDT THU JUL 9 1987 ...STRONG THUNDERSTORMS MOVING THROUGH THE GRAND RAPIDS AREA... AT 1205 PM EDT...WEATHER RADAR INDICATED AN AREA OF STRONG THUNDERSTORMS IN THE SOUTHERN HALF OF KENT COUNTY. THE THUNDERSTORMS WERE MOVING EAST AT 25 MPH. PEA SIZE HAIL HAS BEEN REPORTED WITH THESE THUNDERSTORMS. A REPORT OF WIND GUSTS TO NEAR 50 MPH PER HOUR AND AN INCH AND ONE HALF OF RAAIN IN FIVE MINUTES WERE ALSO RECEIVED PERSONS IN SOUTHERN KENT COUNTY SHOULD BE ON THE LOOKOUT FOR BRIEF HEAVY RAINS...DANGEROUS LIGHTNING...SMALL HAIL AND SOME STRONG WIND GUSTS/IN THESE STORMS AS THEY MOVE THROUGH THE AREA. CARLE
Special weather statement, Jul 9, 12:22 PM EDT, 29 minutes before
SPECIAL WEATHER STATEMENT...CORRECTED... NATIONAL WEATHER SERVICE GRAND RAPIDS MI 1215 PM EDT THU JUL 9 1987 ...STRONG THUNDERSTORMS MOVING THROUGH THE GRAND RAPIDS AREA... AT 1205 PM EDT...WEATHER RADAR INDICATED AN AREA OF STRONG THUNDERSTORMS IN THE SOUTHERN HALF OF KENT COUNTY. THE THUNDERSTORMS WERE MOVING EAST AT 25 MPH. PEA SIZE HAIL HAS BEEN REPORTED WITH THESE THUNDERSTORMS. A REPORT OF WIND GUSTS TO NEAR 50 MPH PER HOUR AND .72 INCHES OF RAINFALL IN FIVE MINUTES WERE ALSO RECEIVED. PERSONS IN SOUTHERN KENT COUNTY SHOULD BE ON THE LOOKOUT FOR BRIEF HEAVY RAINS...DANGEROUS LIGHTNING...SMALL HAIL AND SOME STRONG WIND GUSTS IN THESE STORMS AS THEY MOVE THROUGH THE AREA. CARLKE
The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 12:32 PM EDT | Severe Thunderstorm Warning | GRR | Ionia, Kent | 28 min |
| Jul 9, 12:43 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot | 62 min |
| Jul 9, 1:18 PM EDT | Tornado Warning | GRR | Ionia | 27 min |
| Jul 9, 1:43 PM EDT | Flash Flood Warning | GRR | Gratiot | 2 hr |
| Jul 9, 2:10 PM EDT | Severe Thunderstorm Warning | GRR | Isabella | 18 min |
| Jul 9, 3:01 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun | 59 min |
| Jul 9, 3:02 PM EDT | Severe Thunderstorm Warning | GRR | Kalamazoo | 33 min |
| Jul 9, 3:18 PM EDT | Severe Thunderstorm Warning | GRR | Clinton | 57 min |
| Jul 9, 3:30 PM EDT | Severe Thunderstorm Warning | GRR | Eaton, Ingham | 60 min |
| Jul 9, 4:27 PM EDT | Severe Thunderstorm Warning | GRR | Ingham | 33 min |
| Jul 9, 7:21 PM EDT | Severe Thunderstorm Warning | GRR | Ionia, Kent | 24 min |
| Jul 9, 7:45 PM EDT | Severe Thunderstorm Warning | GRR | Ionia, Kent | 30 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 1987Every 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.