Alert archive / Michigan / Flash Flood Warnings in 1986

Flash Flood Warning 7, NWS Gaylord, MI

September 11, 1986Lake County, Mecosta County, Osceola County, Michigan

NWS Gaylord, MI issued this flash flood warning at Sep 11, 1986, 7:37 AM EDT for Lake County, Mecosta County, Osceola County, Michigan. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Sep 11, 1986, 7:37 AM EDT (11:37 UTC)
Expired
Sep 11, 1986, 12:00 PM EDT
In force
4 hr
Issued by
NWS Gaylord, MI
Area
Whole counties

Counties Lake County, MI, Mecosta County, MI, Osceola 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, 11.6 hours before the alert went out and 210 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, Detroit, MI at 00:00Z on 1986-09-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 200 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, Detroit, MI at 00:00Z on 1986-09-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 247 square meters per square second.193958Sfc1 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
200 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
661 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
247 m²/s²
0-3 km storm-relative helicity
307 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMKG 111137
FFWMKG
MIC105-085-133-127-121-123-107-111600-

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

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 1200 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

WEST CENTRAL LOWER MICHIGAN...MASON...LAKE...OSCEOLA...OCEANA...
 MUSKEGON...NEWAYGO AND MECOSTA

AT 730AM RADAR INDICATED NUMEROUS RAINSHOWERS AND A FEW
THUNDERSTORMS OVER WEST LOWER MICHIGAN STRETCHING WEST INTO
WISCONSIN.  ALTHOUGH THE INTENSITY OF THE RAIN HAS WEAKENED...
FLOODING WILL REMAIN A PROBLEM AS WATER RUNOFF WILL CONTINUE OVER
ALREADY WATERLOGGED GROUND.

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, 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 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.