Alert archive / Michigan / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 9, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jul 18, 1990, 3:05 PM EDT for Isabella County, Michigan. It was in force for 55 min.
The area
The counties it named.
The facts
- Issued
- Jul 18, 1990, 3:05 PM EDT (19:05 UTC)
- Expired
- Jul 18, 1990, 4:00 PM EDT
- In force
- 55 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, 7.1 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- NaN m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KLAN 181905
SVRLAN
MIC073-182000-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LANSING MI
305 PM EDT WED JUL 18 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 400 PM EDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE CENTRAL PART OF LOWER MICHIGAN
ISABELLA
AT (3:00PM EDT A SEVERE THUNDERSTORM WAS INDICATED BY RADAR ABOUT
TEN MILES NORTHWEST OF THE CITY OF MOUNT PLEASANT IN ISABELLA
COUNTY. THE STORM WAS MOVING SOUTHEAST ABOUT 20 MPH...AND WILL
MOVE THROUGH THE CITY OF MOUNT PLEASANT BETWEEN 315 AND 330 PM.
IF YOU ARE IN AN AREA THREATENED BY THE STORM..GO TO A REINFORECED
SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY
RAIN AND LIGHTNING.
THIS SLOW MOVING THUNDERSTORM MAY CAUSE FLOODING OF SMALL STREAMS
AND UNDERPASSES.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 18, 10:30 AM EDT, 4 hours 35 minutes before
MIZ052-181600 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MUSKEGON MI 930 AM EDT WED JUL 18 1990 ...THUNDERSTORMS WITH VERY HEAVY RAIN OVER WEST AND CENTRAL WEXFORD COUNTY... AT 930 AM EDT WEATHER RADAR DETECTED THUNDERSTORMS WITH VERY HEAVY RAIN OVER WESTERN AND CENTRAL WEXFORD COUNTY MOVING EAST AT ABOUT 25 MILES PER HOUR. STRONG GUSTY WINDS AND SMALL HAIL MAY ACCOMPANY THESE STORMS. MOTORISTS DRIVING ALONG M-37...M-115...AND M-5.5 WILL ENCOUNTER SHARPLY REDUCED VISIBILITIES IN VERY HEAVY RAINFALL. REDUCE DRIVING SPEED AND ALLOW EXTRA TIME FOR TRAVEL AS PONDING OF WATER ALONG LOW LYING ROADWAYS SHOULD ALSO BE EXPECTED. DUBRISH
Special weather statement, Jul 18, 11:43 AM EDT, 3 hours 22 minutes before
MIZ054-052-050-181800 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MUSKEGON MI 1140 AM EDT WED JUL 18 1990 ...LINE OF THUNDERSTORMS FROM OFFSHORE BIG SABLE POINT EAST TO NEAR HOUGHTON LAKE... AT 1140 AM EDT WEATHER RADAR DETECTED THUNDERSTORMS WITH VERY HEAVY RAIN FROM THE OFFSHORE WATERS 20 MILES NORTHWEST OF BIG SABLE POINT EXTENDING EAST TO 15 MILES SOUTHWEST OF HOUGHTON LAKE. STRONGEST OF THE THUNDERSTORMS WAS LOCATED NEAR FALMOUTH IN SOUTHERN MISSAUKEE COUNTY. STRONG GUSTY WINDS AND SMALL HAIL MAY ACCOMPANY THESE STORMS. MOTORISTS SHOULD ALLOW EXTRA TIME FOR TRAVEL AS HEAVY RAINFALL WILL SHARPLY REDUCE DRIVING VISIBILITIES AND CREATE PONDING OF WATER IN LOW LYING ROADWAYS. DUBRISH
Special weather statement, Jul 18, 12:37 PM EDT, 2 hours 28 minutes before
MIZ049-051-053-181800 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MUSKEGON MI 1235 PM EDT WED JUL 18 1990 ...LINE OF THUNDERSTORMS DRENCHES WEST CENTRAL MICHIGAN... VERY HEAVY RAINFALL EXTENDED FROM THE NEARSHORE WATERS OFF LUDINGTON INLAND ACROSS CENTRAL MASON...LAKE...AND NORTHERN OSCEOLA COUNTIES. CAMPERS AND SPORTSMAN ALONG THE BIG SABLE RIVER IN MASON COUNTY AND ALONG THE LITTLE MANISTEE RIVER IN NORTHERN LAKE COUNTY SHOULD STAY ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS THAT MIGHT ENDANGER THEIR CAMPSITES. STRONG GUSTY WINDS...HEAVY DOWNPOURS...AND SMALL HAIL MAY ACCOMPANY THESE STORMS. MOTORISTS SHOULD ALLOW EXTRA TIME FOR TRAVEL AS HEAVY RAINFALL WILL SHARPLY REDUCE DRIVING VISIBILITIES AND CREATE PONDING OF WATER ACROSS LOW LYING ROADWAYS. DUBRISH
Special weather statement, Jul 18, 1:24 PM EDT, 1 hour 41 minutes before
MIZ014-051-053-181900 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MUSKEGON MI 120 PM EDT WED JUL 18 1990 ...CLUSTER OF THUNDERSTORMS DROPPING SMALL HAIL... RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY RAINFALL EXTENDING FROM OFF LITTLE SABLE POINT INLAND ACROSS SOUTHERN MASON...LAKE...AND NORTHERN NEWAYGO COUNTIES. SMALL HAIL WAS REPORTED SOUTH OF SCOTTSVILLE IN MASON COUNTY SHORTLY BEFORE 1PM. STRONG GUSTY WINDS...DEADLY LIGHTNING STRIKES...HEAVY DOWNPOURS...AND SMALL HAIL MAY ACCOMPANY THESE STORMS AS THEY MOVE SOUTHEAST AT ABOUT 25 MILES AN HOUR. MOTORISTS SHOULD ALLOW EXTRA TIME FOR TRAVEL AS HEAVY RAINFALL WILL SHARPLY REDUCE DRIVING VISIBILITIES AND CREATE PONDING OF WATER ACROSS LOW LYING ROADWAYS. DUBRISH
The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 4:21 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot | 39 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 1990Every severe thunderstorm warning in 1990
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.