Alert archive / Michigan / Flash Flood Warnings in 2001

Flash Flood Warning 2, NWS Grand Rapids, MI

April 11, 2001Muskegon County, Michigan

NWS Grand Rapids, MI issued this flash flood warning at Apr 11, 2001, 9:51 PM EDT for Muskegon County, Michigan. It was in force for 3 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: Apr 11, 2001, 9:51 PM EDT (01:51 UTC)
Expired: Apr 12, 2001, 12:45 AM EDT
In force: 3 hr
Issued by: NWS Grand Rapids, MI
Area: Whole counties

County Muskegon County, MI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.9 hours before the alert went out and 206 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 737 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 33 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 
WGUS53 KGRR 120151
FFWGRR
MIC121-120445-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
951 PM EDT WED APR 11 2001

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MUSKEGON COUNTY IN WEST CENTRAL MICHIGAN

* UNTIL 1245 AM EDT

* AT 947 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED 
  TO INDICATE HEAVY RAIN PRODUCING THUNDERSTORMS OVER MUCH OF MUSKEGON 
  COUNTY. ADDITIONAL THUNDERSTORMS EXTENDED WEST ACROSS LAKE MICHIGAN 
  AND INTO NORTHERN ILLINOIS. THESE STORMS WILL MOVE THROUGH THE AREA 
  OVER THE NEXT FEW HOURS.

* AT 947 PM EDT...THE PUBLIC REPORTED FLASH FLOODING FROM 17 MILES
  NORTH OF MONTAGUE TO 10 MILES EAST OF MUSKEGON...OR FROM 6 MILES
  SOUTHWEST OF HART TO 10 MILES EAST OF MUSKEGON...MOVING NORTHEAST
  AT 20 MPH.

AT 945 PM... FLOODING WAS REPORTED ON SEAWAY AND SHERMAN ROADS... AS 
WELL AS MUCH OF URBAN MUSKEGON. FLOODING WAS ALSO REPORTED IN THE 
LAKETON AREA. RAINFALL OF 1 TO 2 INCHES HAS FALLEN ACROSS MUCH OF MUSKEGON
COUNTY THUS FAR THIS EVENING.

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

41/TRH

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 11, 8:06 PM EDT	Tornado Warning	GRR	Kent	29 min
Apr 11, 8:36 PM EDT	Severe Thunderstorm Warning	GRR	Mecosta, Montcalm	39 min
Apr 11, 11:21 PM EDT	Severe Thunderstorm Warning	GRR	Muskegon, Ottawa	39 min
Apr 11, 11:36 PM EDT	Severe Thunderstorm Warning	GRR	Newaygo	24 min
Apr 11, 11:45 PM EDT	Tornado Warning	GRR	Newaygo	30 min
Apr 11, 11:58 PM EDT	Tornado Warning	GRR	Muskegon	17 min
Apr 12, 12:09 AM EDT	Severe Thunderstorm Warning	GRR	Kent	36 min
Apr 12, 12:14 AM EDT	Severe Thunderstorm Warning	GRR	Mecosta, Montcalm	31 min
Apr 12, 12:19 AM EDT	Tornado Warning	GRR	Newaygo	26 min
Apr 12, 12:25 AM EDT	Severe Thunderstorm Warning	GRR	Osceola	35 min
Apr 12, 12:29 AM EDT	Tornado Warning	GRR	Mecosta	31 min
Apr 12, 12:42 AM EDT	Severe Thunderstorm Warning	GRR	Clare, Isabella	48 min
Apr 12, 12:57 AM EDT	Tornado Warning	GRR	Clare, Osceola	33 min

Nearby

Flash Flood Warnings in Michigan, 2001 Every flash flood warning in 2001

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.