Alert archive / Michigan / Flash Flood Warnings in 1991

Flash Flood Warning 1, NWS Gaylord, MI

April 9, 1991Arenac County, Michigan

NWS Gaylord, MI issued this flash flood warning at Apr 9, 1991, 11:45 AM EDT for Arenac County, Michigan. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Apr 9, 1991, 11:45 AM EDT (15:45 UTC)
Expired
Apr 9, 1991, 5:00 PM EDT
In force
5 hr
Issued by
NWS Gaylord, MI
Area
Whole counties

County Arenac County, MI

The nearest sounding before it

Detroit, MI (KFNT), launched 12:00Z, 3.8 hours before the alert went out and 149 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 12:00Z on 1991-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 1991-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
542 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
106 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KAPN 091542
FFWAPN
MIC011-092100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE ALPENA MI
1145 AM EDT TUE APR 9 1991

THE NATIONAL WEATHER SERVICE HAS ISSUED A SMALL STREAM
FLOOD WARNING EFFECTIVE UNTIL 500 PM EDT FOR PEOPLE IN THE FOLLOWING
COUNTIES

   IN THE EAST CENTRAL PART OF LOWER MICHIGAN
      ARENAC...

RECENT HEAVY RAINS HAS LEFT STANDING WATERS AND SWOLLEN RIVERS AND
STREAMS IN ARENAC COUNTY...ESPECIALLY ALONG THE PINE RIVER.

THE SHERIFFS DEPARTMENT INDICATED THAT SOME EVACUATION ALONG THE
PINE RIVER WAS OCCURRING.

ALTHOUGH RAIN WAS SLOWLY COMING TO AN END LATE THIS MORNING...RISING
WATER AND PONDING OF WATER WILL CONTINUE TO BE A bPROBLEM THIS
AFTERNOON.

IF YOU ARE IN ARENAC COUNTY...ESPECIALLY ALONG THE PINE RIVER...
MOVE TO HIGHER GROUND.

CAMPBELL

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 12:20 PM EDTFlash Flood WarningAPXArenac6 hr
Apr 9, 5:00 PM EDTFlash Flood WarningAPXArenac6 hr

Nearby

Flash Flood Warnings in Michigan, 1991Every flash flood warning in 1991

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.