Alert archive / Michigan / Flash Flood Warnings in 1986

Flash Flood Warning 4, NWS Gaylord, MI

September 11, 1986Mason County, Michigan

NWS Gaylord, MI issued this flash flood warning at Sep 11, 1986, 3:35 AM EDT for Mason County, Michigan. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Sep 11, 1986, 3:35 AM EDT (07:35 UTC)
Expired
Sep 11, 1986, 8:00 AM EDT
In force
4 hr
Issued by
NWS Gaylord, MI
Area
Whole counties

County Mason 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 7.6 hours before the alert went out and 146 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.

Skew-T log-pSkew-T log-p diagram, Green Bay/Straub, WI at 00:00Z on 1986-09-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 00:00Z on 1986-09-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
7 J/kg
Mixed-layer CIN
-162 J/kg
Mixed-layer LCL
664 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
65 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMKG 110735
FFWMKG
MIC105-085-133-107-111200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MUSKEGON MI
335 AM EDT THU SEP 11 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 800 AM EDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

WEST CENTRAL LOWER MICHIGAN...MASON...LAKE...OSCEOLA AND MECOSTA

AT 325AM EDT RADAR INDICATED HEAVY RAIN THROUGHOUT THESE COUNTIES
IN WEST CENTRAL LOWER MICHIGAN AND SHERIFFS REPORT WATER 8 FEET
DEEP IN REED CITY IN OSCEOLA COUNTY..WITH RESCUE ONGOING BY BOAT.
THE DAMS ON THE HERSEY RIVER ARE FULL AND OVERFLOWING. THE SHERIFF
IN MECOSTA COUNTY REPORTS FLOODING AT BIG RAPIDS AND WINTERS CREEK
WAS OUT OF ITS BANKS.  IT APPEARS THAT WILLIAMS DAM WILL OVERFLOW.

PERSONS ALONG RIVERS..STREAMS..AND CREEKS IN THESE COUNTIES SHOULD
GO TO HIGHER GROUND NOW.  DO NOT ATTEMPT TO CROSS STREAMS OR ROADS
COVERED WITH WATER.

A FLASH FLOOD WARNING MEANS FLOODING IS IMMINENT OR HAS BEEN
REPORTED. TAKE ACTION TO SAFEGUARD LIFE AND PROPERTY.

GALLOWAY

The office that day

Everything else NWS Gaylord, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 10, 8:16 PM EDTSevere Thunderstorm WarningAPXMuskegon, Newaygo59 min
Sep 10, 9:10 PM EDTFlash Flood WarningAPXMuskegon, Newaygo110 min
Sep 10, 11:02 PM EDTFlash Flood WarningAPXMuskegon, Newaygo, Oceana118 min
Sep 11, 3:35 AM EDTFlash Flood WarningAPXLake, Mecosta, Osceola4 hr
Sep 11, 6:15 AM EDTFlash Flood WarningAPXMuskegon105 min
Sep 11, 7:37 AM EDTFlash Flood WarningAPXMuskegon, Newaygo, Oceana4 hr
Sep 11, 7:37 AM EDTFlash Flood WarningAPXLake, Mecosta, Osceola4 hr
Sep 11, 7:37 AM EDTFlash Flood WarningAPXMason4 hr
Sep 11, 11:40 AM EDTFlash Flood WarningAPXOceana3 hr
Sep 11, 7:49 PM EDTFlash Flood WarningAPXOceana2 hr

Nearby

Flash Flood Warnings in Michigan, 1986Every flash flood 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.