Alert archive / Michigan / Flash Flood Warnings in 1994

Flash Flood Warning 4, NWS Detroit, MI

April 25, 1994Genesee County, Michigan

NWS Detroit, MI issued this flash flood warning at Apr 25, 1994, 10:43 PM EDT for Genesee County, Michigan. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Apr 25, 1994, 10:43 PM EDT (02:43 UTC)
Expired
Apr 26, 1994, 12:45 AM EDT
In force
2 hr
Issued by
NWS Detroit, MI
Area
Whole counties

County Genesee County, MI

The nearest sounding before it

Detroit, MI (KFNT), launched 00:00Z, 2.7 hours before the alert went out and 40 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 1994-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 170 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 1994-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 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
170 J/kg
Mixed-layer CIN
-113 J/kg
Mixed-layer LCL
1027 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
89 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 KFNT 260246 RRA
FFWFNT
MIC049-260445-
 
BULLETIN - EBS ACTIVATION REQUESTED
URBAN AND SMALL STREAM FLOOD WARNING
NATIONAL WEATHER SERVICE FLINT MI
1043 PM EDT MON APR 25 1994
 
THE NATIONAL WEATHER SERVICE IN FLINT HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1245 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN EAST CENTRAL LOWER MICHIGAN
 
   ...GENESEE COUNTY
 
AT 1040 PM...GENESEE COUNTY CENTRAL DISPATCH REPORTED WIDESPREAD
FLOODING. NORTH GENESEE ROAD...IN THE 6000 BLOCK IN THE COMMUNITY OF
GENESEE...15 MILES NORTH NORTHEAST OF FLINT...WAS REPORTED TO BE UNDER
WATER. ALSO...FLUSHING ROAD NEAR I75 ALSO WAS REPORTED TO BE FLOODED.
 
THIS FLOODING HAS RESULTED FROM THE RAINFALL PRODUCED BY A SERIES OF
THUNDERSTORMS ACROSS THE COUNTY. 1 TO 2 INCHES OF RAIN HAS FALLEN SINCE
EARLY THIS EVENING.
 
THUNDERSTORMS WILL CONTINUE FOR THE NEXT 2 HOURS ACROSS GENESEE COUNTY.
THE THUNDERSTORMS SHOULD BEGIN TO TAPER OFF AROUND 100 AM.
 
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
 
 
 
&

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Apr 25, 7:35 PM EDT, 3 hours 8 minutes before
MIZ053>055-060>062-260035-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLINT  MI
735 PM EDT MON APR 25 1994

...THUNDERSTORMS CONTINUE TO DROP HEAVY RAIN ACROSS PORTIONS OF EAST
CENTRAL LOWER MICHIGAN...

AT 733 PM...THUNDERSTORMS CONTINUED ACROSS PORTIONS OF EAST CENTRAL
LOWER MICHIGAN.  THESE STORMS WERE IN AN AREA THAT EXTENDED SOUTH
HIGHWAY M-46.  A STRONG STORM WAS LOCATED IN SOUTHEAST SANILAC COUNTY
NEAR THE COMMUNITY OF AMADOR...75 MILES EAST OF FLINT.  ANOTHER STRONG
STORM WAS NEAR BURNSIDE AND IMLAY CITY.  IMAY CITY IS 41 MILES EAST OF
FLINT.  ANOTHER STRONG STORM WAS OVER SWARTZ CREEK...13 MILES SOUTHWEST
OF FLINT.  MOVEMENT OF THESE STORMS WAS TO THE EAST AT 40 MILES AN HOUR.

THE SWARTZ CREEK STORM WILL AFFECT GRAND BLANC BY 800 PM.  THE IMLAY
CITY STORM WILL MOVE INTO ST. CLAIR COUNTY BY 745 PM AND THE STORM NEAR
BURNSIDE WILL AFFECT ROSEBURG...65 MILES EAST NORTHEAST OF FLINT...BY
815 PM.

THESE STORMS CONTAINT VERY HEAVY RAIN...CONTINUOUS LIGHTNING AND
POSSIBLY SOME SMALL HAIL.

DURING A THUNDERSTORM...REMAIN INDOORS AND REFRAIN FROM USING WATER
UNTIL THE STORM HAS PASSED.
Special weather statement, Apr 25, 8:08 PM EDT, 2 hours 35 minutes before
MIZ063-068>070-075-076-082-083-260200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT MI
807 PM EDT MON APR 25 1994

...STRONG THUNDERSTORMS WERE CLIPPING NORTHERN PORTIONS OF ST. CLAIR
AND OAKLAND COUNTIES...

AT 800 PM...RADAR INDICATED A BAND OF THUNDERSTORMS...SOME WITH VERY
HEAVY RAIN AND FREQUENT LIGHTNING...FROM JUST NORTH OF PORT HURON
WEST ACROSS THE FLINT AREA. SOME OF THESE STORMS MAY ALSO CONTAIN
SMALL HAIL AND STRONG WINDS.

THE STORMS WERE TRACKING EAST AROUND 40 MPH. COMMUNITIES THAT WILL BE
AFFECTED BY THESE STORMS THROUGH 10 PM INCLUDE YALE...CAPAC...AND
OXFORD. CAPAC IS 47 MILES NORTH OF DOWNTOWN DETROIT...AND OXFORD IS
35 MILES NORTHWEST OF DOWNTOWN DETROIT.

A SPECIAL MARINE WARNING IS IN EFFECT FOR THE SHORE OF LAKE HURON
NORTH OF PORT HURON UNTIL 850 PM. BOATERS ALONG THE ST. CLAIR COUNTY
SHORE OF LAKE HURON SHOULD FIND SAFE HARBOR NOW. IF YOU LIVE IN THE
AFFECTED AREA...FIND SHELTER INSIDE A STRONG BUILDING. HEAVY RAIN
UP TO ONE INCH IN A FEW HOURS HAS BEEN REPORTED WITH THESE STORMS.
WATCH OUT FOR PONDING OF WATER ON ROADS.

YORK
Special weather statement, Apr 25, 8:46 PM EDT, 1 hour 57 minutes before
MIZ053>055-060>062-260145-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLINT  MI
846 PM EDT MON APR 25 1994

...THUNDERSTORMS CONTINUE TO RUMBLE THROUGH PORTIONS OF EAST CENTRAL
LOWER MICHIGAN...

AT 845 PM...THUNDERSTORMS WITH VERY HEAVY RAIN...INTENSE CLOUD TO
GROUND LIGHTNING AND POSSIBLY SOME SMALL HAIL...EXTENDED FROM THE LAKE
HURON SHORELINE NEAR RICHMONDVILLE IN SANILAC COUNTY...SOUTHWEST TO
LAPEER...TO FLINT...THROUGH DURAND IN SHIAWASSEE COUNTY THEN ON TO
LANSING.  THE STRONGEST STORMS WERE NEAR ALMONT...45 MILES EAST OF
FLINT AND NEAR DURAND...24 MILES SOUTHWEST OF FLINT.  MOVEMENT WAS TO
THE EAST AT 40 MILES AN HOUR.

THE STORM NEAR DURAND WILL MAKE IT TO RANKIN...14 SOUTH OF
FLINT...BY 900 PM...WHILE THE ALMONT STORM WILL MOVE INTO ST. CLAIR
COUNTY ALSO BY 900 PM.

THESE STORMS CONTINUE TO DUMP HEAVY RAIN...HAVE STRONG GUSTY WIND AND
POSSIBLY SOME SMALL HAIL.  ALSO...AREAS WHERE THE RAIN HAS BEEN
HEAVY...THE GROUND IS BECOMING SATURATED.  THEREFOR...IF THESE AREAS
CONTINUE TO RECEIVE HEAVY RAIN OVER THE NEXT SEVERAL HOURS...URBAN
AREAS AND SMALL STREAMS MAY BEGIN TO FLOOD.

MOTORISTS SHOULD REMAIN ALERT FOR REDUCED VISIBILITIES DURING
DOWNPOURS OF RAIN.t  STREETS MAY FLOOD QUICKLY.
Special weather statement, Apr 25, 8:50 PM EDT, 1 hour 53 minutes before
MIZ053>055-060>062-260145-

SPECIAL WEATHER STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE FLINT  MI
846 PM EDT MON APR 25 1994

...THUNDERSTORMS CONTINUE TO RUMBLE THROUGH PORTIONS OF EAST CENTRAL
LOWER MICHIGAN...

AT 845 PM...THUNDERSTORMS WITH VERY HEAVY RAIN...INTENSE CLOUD TO
GROUND LIGHTNING AND POSSIBLY SOME SMALL HAIL...EXTENDED FROM THE LAKE
HURON SHORELINE NEAR RICHMONDVILLE IN SANILAC COUNTY...SOUTHWEST TO
LAPEER...TO FLINT...THROUGH DURAND IN SHIAWASSEE COUNTY THEN ON TO
LANSING.  THE STRONGEST STORMS WERE NEAR ALMONT...45 MILES EAST OF
FLINT AND NEAR DURAND...24 MILES SOUTHWEST OF FLINT.  MOVEMENT WAS TO
THE EAST AT 40 MILES AN HOUR.

THE STORM NEAR DURAND WILL MAKE IT TO RANKIN...14 SOUTH OF
FLINT...BY 900 PM...WHILE THE ALMONT STORM WILL MOVE INTO ST. CLAIR
COUNTY ALSO BY 900 PM.

THESE STORMS CONTINUE TO DUMP HEAVY RAIN...HAVE STRONG GUSTY WIND AND
POSSIBLY SOME SMALL HAIL.  ALSO...AREAS WHERE THE RAIN HAS BEEN
HEAVY...THE GROUND IS BECOMING SATURATED.  THEREFORE...IF THESE AREAS
CONTINUE TO RECEIVE HEAVY RAIN OVER THE NEXT SEVERAL HOURS...URBAN
AREAS AND SMALL STREAMS MAY BEGIN TO FLOOD.

MOTORISTS SHOULD REMAIN ALERT FOR REDUCED VISIBILITIES DURING
DOWNPOURS OF RAIN.  STREETS MAY FLOOD QUICKLY.

MJN

...CORRECTED FOR SPELLING...
Special weather statement, Apr 25, 9:51 PM EDT, 52 minutes before
MIZ063-068>070-075-076-082-083-260400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DETROIT MI
950 PM EDT MON APR 25 1994

...STRONG THUNDERSTORMS WITH HEAVY RAINFALL PERSISTED OVER NORTH
PORTIONS OF ST. CLAIR AND OAKLAND COUNTIES...

AT 945 PM...RADAR INDICATED A BAND OF THUNDERSTORMS...SOME WITH VERY
HEAVY RAIN AND FREQUENT LIGHTNING...FROM JUST NORTH OF PORT HURON
WEST ACROSS THE FLINT AREA. THESE STORMS HAVE PERSISTED IN THE SAME
GENERAL AREA SINCE 700 PM...DROPPING UP TO AN INCH AND A HALF OF
RAIN IN THE FLINT AND LANSING AREAS.

THE STORMS WERE TRACKING EAST AROUND 40 MPH AND WILL CONTINUE TO AFFECT
THE SAME COMMUNITIES THROUGH MIDNIGHT. ALTHOUGH SOME GUSTY WINDS AND
SMALL HAIL ARE POSSIBLE...THE MAIN THREAT FROM THESE STORMS WILL BE
HEAVY RAIN AND DANGEROUS LIGHTNING.

PERSONS IN NORTHERN ST. CLAIR COUNTY SHOULD BE ESPECIALLY ALERT TO THE
POSSIBILITY OF MINOR FLOODING OF ROADS AND POOR DRAINAGE AREAS.
STORMS IN NORTHERN LIVINGSTON...OAKLAND...AND MACOMB COUNTIES WILL
ALSO HAVE SOME BRIEFLY HEAVY RAIN...BUT NO FLOODING IS EXPECTED
THERE.

IF YOU ARE ON THE ROAD TONIGHT NORTH OF DETROIT...BE PREPARED FOR
AREAS OF POOR VISIBILITY IN HEAVY RAIN. WATCH FOR PONDING OF WATER
ON ROADS.

STAY TUNED TO NOAA WEATHER RADIO FOR THE LATEST STATEMENTS.

YORK
Special weather statement, Apr 25, 9:54 PM EDT, 49 minutes before
MIZ048-053>055-060>062-260255-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FLINT  MI
955 PM EDT MON APR 25 1994

...THE GROUND IS BECOMING SATURATED DUE TO CONTINUED HEAVY RAIN...

AT 952 PM...AN AREA OF THUNDERSTORMS CONTINUED ACROSS MUCH OF EAST
CENTRAL LOWER MICHIGAN.  THE STRONGEST STORMS WERE JUST WEST OF FLINT.
MOVEMENT OF THIS AREA WAS TO THE EAST AT 40 MILES AN HOUR.  THE STORM
JUST WEST OF FLINT WILL AFFECT THE COMMUNITY OF LAPEER BY 1015 PM.

THUNDERSTORMS WILL CONTINUE TO MOVE OVER SHIAWASSEE COUNTY...GENESEE
COUNTY AND LAPEER COUNTY FOR THE NEXT SEVERAL HOURS AND WILL PRODUCE
COPIOUS AMOUNTS OF RAIN.  THE GROUND IS BECOMING SATURATED AND POSSIBLE
URBAN AND SMALL STREAM FLOODING IS A POSSIBILITY.  THESE THUNDERSTORMS
WILL ALSO PRODUCE CLOUD TO GROUND LIGHTNING.

MOTORISTS SHOULD REMAIN ALERT FOR REDUCED VISIBILITIES DURING
DOWNPOURS OF RAIN.  STREETS MAY FLOOD QUICKLY.

TUNE IN NOAA WEATHER RADIO OR YOUR LOCAL RADIO OR TV STATION FOR
THE LATEST WEATHER INFORMATION ON THIS DANGEROUS WEATHER SITUATION.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 26, 12:59 PM EDTSevere Thunderstorm WarningDTXLivingston, Oakland, Washtenaw46 min

Nearby

Flash Flood Warnings in Michigan, 1994Every flash flood warning in 1994

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.