Alert archive / Michigan / Flash Flood Warnings in 2000

Flash Flood Warning 2, NWS Grand Rapids, MI

May 12, 2000Allegan County, Barry County, Michigan

NWS Grand Rapids, MI issued this flash flood warning at May 12, 2000, 10:30 PM EDT for Allegan County, Barry County, Michigan. It was in force for 4 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: May 12, 2000, 10:30 PM EDT (02:30 UTC)
Expired: May 13, 2000, 2:00 AM EDT
In force: 4 hr
Issued by: NWS Grand Rapids, MI
Area: Whole counties

Counties Allegan County, MI, Barry County, MI

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 2.5 hours before the alert went out and 179 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2536 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 945 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 198 m²/s²
0-3 km storm-relative helicity: 314 m²/s²
Significant tornado parameter: 3.7
Supercell composite: 31.4

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KGRR 130235
FFWGRR
MIC005-015-130600-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1030 PM EDT FRI MAY 12 2000

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  ALLEGAN COUNTY IN SOUTHWEST MICHIGAN
  BARRY COUNTY IN SOUTHWEST MICHIGAN

* UNTIL 200 AM EDT

* AT 1025 PM EDT DOPPLER RADAR CONTINUED TO SHOW SCATTERED SHOWERS 
AND A FEW THUNDERSTORMS SCATTERED ACROSS ALLEGAN COUNTY. ADDITIONAL 
RAINFALL AMOUNTS OF A TENTH TO A QUARTER OF AN INCH ARE POSSIBLE 
BEFORE THE RAIN ENDS AFTER MIDNIGHT. 

DOPPLER RADAR ESTIMATED 1 TO 3 INCHES OF RAIN HAD FALLEN ACROSS THE 
WARNED COUNTIES AS OF 1025 PM EDT FROM THIS EVENING'S THUNDERSTORMS. 
THE HEAVIEST RAIN FELL NEAR SAUGATUCK... FENNVILLE AND HAMILTON IN 
WESTERN ALLEGAN COUNTY AND NEAR HASTINGS AND MIDDLEVILLE IN WESTERN 
BARRY COUNTY. FLOODING WAS REPORTED NEAR FENNVILLE ALONG MICHIGAN 
HIGHWAY 89 AT 715 PM EDT. THERE WAS ALSO A REPORT OF ROADS BEING 
WASHED OUT AT THE INTERSECTION OF 1ST AND 104TH STREETS IN WAYLAND 
AT 930 PM. 

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

MOTORISTS SHOULD NOT ATTEMPT TO CROSS ROADWAYS THAT ARE UNDER WATER. 
BE ESPECIALLY CAREFUL AT NIGHT WHEN WATER COVERED ROADS ARE 
DIFFICULT TO SEE. IF YOU LIVE NEAR CREEKS AND STREAMS...BE PREPARED 
TO MOVE TO HIGHER GROUND SHOULD FLOOD WATERS THREATEN. 

STAY TUNED TO NOAA WEATHER RADIO...LOCAL TELEVISION OR RADIO 
STATIONS...OR CABLE TELEVISION OUTLETS FOR LATER INFORMATION.

ANOTHER STATEMENT ON THIS FLASH FLOOD SITUATION WILL BE ISSUED 
AROUND 200 AM EDT SATURDAY.

LAURENS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 8:23 PM EDT	Tornado Warning	GRR	Barry	22 min

Nearby

Flash Flood Warnings in Michigan, 2000 Every flash flood warning in 2000

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.