Alert archive / Michigan / Flash Flood Warnings in 1997

Flash Flood Warning 7, NWS Detroit, MI

February 21, 1997Huron County, Lapeer County, Sanilac County, Michigan

NWS Detroit, MI issued this flash flood warning at Feb 21, 1997, 7:10 PM EST for Huron County, Lapeer County, Sanilac County, Michigan. It was in force for 10 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Feb 21, 1997, 7:10 PM EST (00:10 UTC)
Expired
Feb 22, 1997, 5:00 AM EST
In force
10 hr
Issued by
NWS Detroit, MI
Area
Whole counties

Counties Huron County, MI, Lapeer County, MI, Sanilac County, MI

The radar

The Detroit radar (KDTX), 98 km from the middle of the area, began a volume at 00:11 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 0.2 hours before the alert went out and 95 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 1997-02-22Temperature 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 00:00Z on 1997-02-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 square meters per square second.1939587897117136156175Sfc1 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
474 m above ground
0-6 km bulk shear
82 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
87 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 KDTX 220012
FFWDTX
MIC017-049-063-087-111-145-151-155-157-221000-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE DETROIT PONTIAC MI
710 PM EST FRI FEB 21 1997
 
THE NATIONAL WEATHER SERVICE IN DETROIT PONTIAC HAS EXTENDED THE
FLOOD WARNING...NOW EFFECTIVE UNTIL 500 AM EST FOR PEOPLE IN THE
FOLLOWING COUNTIES IN SOUTHEAST LOWER MICHIGAN...
 
        BAY        GENESEE    HURON        LAPEER     MIDLAND
        SAGINAW    SANILAC    SHIAWASSEE   TUSCOLA
 
THIS INCLUDES THE FOLLOWING CITIES AND SURROUNDING AREAS OF...
 
        BAD AXE    BAY CITY   CARO       FLINT      LAPEER
        MIDLAND    OWOSSO     SAGINAW    SANDUSKY
 
SHERIFF DEPARTMENTS REPORT NUMEROUS ROADS CLOSED DUE TO FLOODING IN
THE THUMB...TRI-CITIES...AND FLINT AREAS. THE RAIN ACROSS
THESE COUNTIES WILL CHANGE OVER TO SNOW THIS EVENING. HOWEVER...THE
ADDITIONAL PRECIPITATION TONIGHT WILL AGGRAVATE THE FLOODING SITUATION
IN THESE COUNTIES.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS. MOST DEATHS IN FLOODING OCCUR IN AUTOMOBILES.
DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...
ON FOOT.
 
BOYNE
&

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 21, 7:10 PM ESTFlash Flood WarningDTXGenesee, Saginaw, Shiawassee10 hr
Feb 21, 7:10 PM ESTFlash Flood WarningDTXBay, Midland, Tuscola10 hr

Nearby

Flash Flood Warnings in Michigan, 1997Every flash flood warning in 1997

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; radar from the NEXRAD Level II archive.