Alert archive / Michigan / Flash Flood Warnings in 1986

Flash Flood Warning 5, NWS Gaylord, MI

September 11, 1986Muskegon County, Michigan

NWS Gaylord, MI issued this flash flood warning at Sep 11, 1986, 6:15 AM EDT for Muskegon County, Michigan. It was in force for 105 min.

The area

The counties it named.

The facts

Issued
Sep 11, 1986, 6:15 AM EDT (10:15 UTC)
Expired
Sep 11, 1986, 8:00 AM EDT
In force
105 min
Issued by
NWS Gaylord, MI
Area
Whole counties

County Muskegon 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, 10.3 hours before the alert went out and 206 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 110838
FFWMKG
MIC127-121-123-111200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MUSKEGON MI
438 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...OCEANA...NORTHERN MUSKEGON AND NEWAYGO

AT 435AM EDT RADAR INDICATED THUNDERSTORMS AND RAINSHOWERS..SOME
HEAVY..OVER WEST CENTRAL LOWER MICHIGAN.  THESE STORMS AND SHOWERS
SPREAD EAST FROM WISCONSIN AND WILL CONTINUE TO MOVE ACROSS AREAS
THAT ARE ALREADY FLOODING.

IF YOU LIVE ALONG A RIVER..STREAM..OR CREEK OR OTHER LOW LYING AREA
SUBJECT TO PONDING OF WATER..YOU SHOULD SEEK SAFETY NOW.  CREEKS
AND RIVERS UPSTREAM ARE OVERFLOWING THEIR BANKS AND THIS WATER WILL
BE MOVING RAPIDLY DOWNSTREAM.

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, 3:35 AM EDTFlash Flood WarningAPXMason4 hr
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.