Alert archive / Michigan / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 47, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Aug 22, 1987, 12:18 AM EDT for Kent County, Michigan. It was in force for 27 min.
The area
The counties it named.
The facts
- Issued
- Aug 22, 1987, 12:18 AM EDT (04:18 UTC)
- Expired
- Aug 22, 1987, 12:45 AM EDT
- In force
- 27 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, 4.3 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
- 683 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 1045 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 271 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.9
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, Aug 21, 8:04 PM EDT, 4 hours 14 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LANSING, MI 755 PM EDT FRI AUG 21 1987 ...VERY STRONG THUNDERSTORM MOVING THRU JACKSON COUNTY... AT 755 PM RADAR SHOWS VERY STRONG THUNDERSTORMS MOVING SOUTHEAST THRU JACKSON COUNTY. THESE STORMS ARE PART OF A LARGER AREA OF THUNDERSTORMS EXTENDING FROM GRAD RPIDS THRU BARRY CCALHOUN EATON BBRANCH AND HILLSDALE COUNTIES. THE AREA IS MOVINGG FROM THE WEST NORTHWEST AT 35 MPH. THE STORMS IN JACK;SON COUNY WHICH ARE THE STRONGEST CCAN PRODUCE STRONG GUSTY WINDS SMALL HAIL AND HEAVY RAINFALL. PERSONS IN JACKSON COUNTY SHOULD BE ON THE ALERT FOR THESE STORMS AND TO TAKE SHELTEER WHEN NEEDED. REISNER
Special weather statement, Aug 21, 11:13 PM EDT, 1 hour 5 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LANSING, MI 1057 PM EDT FRI AUG 21 1987 ...VERY STRONG THUNDERSTORM MOVING THRU CALHOUN AND BRANCH COUNTIES. AT 1055 RADAR SHOWS A LARGE AAREA OF THUNDERSTORMS ACROSS THE SOUTHERN HALF OF CALHOUN COUNTY AND ALL OF BRANCH AND HILLSDALE CPUNTIES. THE STRONGEST ACTIVITY WAS ACROSS SOUTHEERN CALHOUN NORTHERN BRANCH AND WEST CENTRAL HILLSDALE COUNTIES. ALL STORMS WERE MOVING TO THE EAST SOUTHEAST AT 45 MPH. REPORTS FROM THESE AREAS TELL OF HEAVY RAINS AND FREQUENT CLOUD TO GROUND LIGHTNING. REISNER
Special weather statement, Aug 22, 12:02 AM EDT, 16 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LANSING, MI 1155 PM EDT FRI AUG 21 1987 ...VERY STRONG THUNDERSTORM INTO GRATIOT AND CLINTON COUNTIES... AT 1155 PM RADAR INDICTES AN AREA OF VERY STRONG THUNDERSTORMS MOVING THRU MONTCALM COUNTIES TO THE EAST AT 40 TO 45 MPH. THESE STORMS WILL MOVE THRU GRATIOT COUNTY AND THE NORTHERN HALF OF CLINTON COUNTY WITHIN THE NEXT HALF HOUR. THESE STORMS WILL CONTAIN VERY STRONG WINDS, HEAVY RAIN AND S MALL HAIL. IF YOU ARE IN THE PATH OF THESE STORMS KEEP ALERT TO THE RAPIDLY CHANGING WEATHER. STAY TUNED TO NOAA WEATER RADIO, OR YOUR LOCAL RADIO OR TELEVISION STATION FOR FURTHER UP DATES. SUTTLE
The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 12:39 AM EDT | Severe Thunderstorm Warning | GRR | Ionia, Kent, Montcalm | 51 min |
| Aug 22, 1:33 AM EDT | Severe Thunderstorm Warning | GRR | Barry, Ionia, Kent | 27 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.