Alert archive / Michigan / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 9, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at May 30, 1989, 6:50 PM EDT for Calhoun County, Michigan. It was in force for 55 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 30, 1989, 6:50 PM EDT (22:50 UTC)
- Expired
- May 30, 1989, 7:45 PM EDT
- In force
- 55 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Whole counties
County Calhoun County, MI
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 30, 7:05 PM EDT | Thunderstorm Wind 55 | Calhoun, MI |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Detroit, MI (KFNT), launched 12:00Z, 10.8 hours before the alert went out and 140 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- NaN m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 86 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, May 30, 4:27 PM EDT, 2 hours 23 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LANSING, MI
424 PM EDT TUE MAY 30 1989
...SEVERE THUNDERSTORM WATCH #358 IN EFFECT UNTIL 1100 PM EDT...
...VERY STRONG THUNDERSTORM MOVING THROUGH INGHAM COUNTY...
AT 420 PM EDT RADAR INDICATED A VERY STRONG THUNDERSTORM IN CENTRAL
INGHAM COUNTY OVER THE CITY OF MASON OR 7 MILES SOUTH OF LANSING. SMALL
HAIL...GUSTY WINDS AND BRIEF HEAVY RAIN ARE POSSIBLE WITH THIS STORM
AS IT MOVES TO THE EAST AT 35 MPH.Special weather statement, May 30, 5:53 PM EDT, 57 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LANSING, MI
546 PM EDT TUE MAY 30 1989
...SEVERE THUNDERSTORM WATCH #358 IN EFFECT UNTIL 1100 PM EDT...
...VERY STRONG THUNDERSTORMS MOVING THROUGH SOUTHERN GRATIOT AND
NORTHERN CLINTON COUNTIES...
AT 545 PM EDT RADAR INDICATED A FEW VERY STRONG THUNDERSTORMS OVER
SOUTHERN GRATIOT AND NORTHERN CLINTON COUNTIES. THESE THUNDERSTORMS
WERE PRODUCING BRIEF VERY HEAVY RAIN AND NUMEROUS LIGHTNING STRIKES
SETTING OFF SENSITIVE ALARM DEVICES.
THE VERY STRONG THUNDERSTORMS WERE IN A LINE OF OTHER STRONG THUNDER-
STORMS STRETCHING FROM SAGINAW BAY SOUTHWEST TO 5 MILES NORTH OF ST.
JOHNS TO 10 MILES SOUTH OF IONIA.
ALL OF THE THUNDERST8ORMS WERE MOVING TO THE EAST-NORTHEAST AT 35 MPH.
KALLASSpecial weather statement, May 30, 5:56 PM EDT, 54 minutes before
SPECIAL WEATHER STATEMENT CORRECTED...ADDED FLOOD WATCH
NATIONAL WEATHER SERVICE LANSING, MI
555 PM EDT TUE MAY 30 1989
...SEVERE THUNDERSTORM WATCH #358 IN EFFECT UNTIL 1100 PM EDT...
...FLOOD WATCH FOR TONIGHT...
...VERY STRONG THUNDERSTORMS MOVING THROUGH SOUTHERN GRATIOT AND
NORTHERN CLINTON COUNTIES...
AT 545 PM EDT RADAR INDICATED A FEW VERY STRONG THUNDERSTORMS OVER
SOUTHERN GRATIOT AND NORTHERN CLINTON COUNTIES. THESE THUNDERSTORMS
WERE PRODUCING BRIEF VERY HEAVY RAIN AND NUMEROUS LIGHTNING STRIKES
SETTING OFF SENSITIVE ALARM DEVICES.
THE VERY STRONG THUNDERSTORMS WERE IN A LINE OF OTHER STRONG THUNDER-
STORMS STRETCHING FROM SAGINAW BAY SOUTHWEST> TO 5 MILES NORTH OF ST.
JOHNS TO 10 MILES SOUTH OF IONIA.
ALL OF THE THUNDERSTORMS WERE MOVING TO THE EAST-NORTHEAST AT 35 MPH.
KALLASSpecial weather statement, May 30, 6:44 PM EDT, 6 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LANSING, MI
637 PM EDT TUE MAY 30 1989
...SEVERE THUNDERSTORM WATCH #358 IN EFFECT UNTIL 1100 PM EDT...
...FLOOD WATCH FOR TONIGHT...
...VERY STRONG THUNDERSTORMS MOVING THROUGH SOUTH CENTRAL LOWER MICHIGAN...
AT 635 PM EDT RADAR INDICATED VERY STRONG THUNDERSTORMS MOVING THROUGH
SOUTH CENTRAL LOWER MICHIGAN. VERY HEAVY RAIN HAS BEEN REPORTED WITH
THESE THUNDERSTORMS. THESE STORMS ARE MOVING TO THE EAST NORTHEAST AT
35 MPH.
WITH HEAVY RAINFALL OCCURING IN THE GREATER LANSING AREA, CLINTON COUNTY.
SOME URBAN FLOODING CAN BE EXPECTED.
IF YOU ARE DRIVING WITH IN THE AREA BE PREPARED TO ENCOUNTER AREAS OF
WATER ALONG RwOADS, AND IN LOW LYING AREAS. AND UNDERPASSES.
SUTTLEThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 6:07 PM EDT | Tornado Warning | GRR | Van Buren | 48 min |
| May 30, 6:34 PM EDT | Tornado Warning | GRR | Allegan | 56 min |
| May 30, 6:44 PM EDT | Severe Thunderstorm Warning | GRR | Kalamazoo | 61 min |
| May 30, 7:29 PM EDT | Severe Thunderstorm Warning | GRR | Jackson | 61 min |
| May 30, 7:31 PM EDT | Severe Thunderstorm Warning | GRR | Allegan | 59 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 1989Every severe thunderstorm warning in 1989
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.