Alert archive / Michigan / Flash Flood Warnings in 2001

Flash Flood Warning 1, NWS Grand Rapids, MI

April 11, 20014 counties in Michigan

NWS Grand Rapids, MI issued this flash flood warning at Apr 11, 2001, 7:53 PM EDT for 4 counties in Michigan. It was in force for 112 min. 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, 7:53 PM EDT (23:53 UTC)
Expired
Apr 11, 2001, 9:45 PM EDT
In force
112 min
Issued by
NWS Grand Rapids, MI
Area
Whole counties

Counties Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Osceola County, MI

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.9 hours before the alert went out and 200 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, Green Bay/Straub, WI at 12:00Z on 2001-04-11Temperature 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, Green Bay/Straub, WI at 12:00Z on 2001-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 167 square meters per square second.1939587897Sfc1 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
576 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
167 m²/s²
0-3 km storm-relative helicity
286 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 112355
FFWGRR
MIC121-123-127-133-120145-

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

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

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

* UNTIL 945 PM EDT

* AT 748 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM NEAR MARION TO 15 MILES SOUTH OF              
  FRUITPORT...OR FROM 15 MILES SOUTHEAST OF CADILLAC TO 10 MILES SOUTH
  OF GRAND HAVEN...MOVING NORTHEAST AT 35 MPH.

RAINFALL OF UP TO 2 INCHES PER HOUR WAS ESTIMATED FROM THE NATIONAL 
WEATHER SERVICE RADAR IN GRAND RAPIDS. 

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 CARUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

JK

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 11, 6:37 PM EDTSevere Thunderstorm WarningGRRMuskegon, Ottawa53 min
Apr 11, 6:52 PM EDTTornado WarningGRRMuskegon38 min
Apr 11, 7:12 PM EDTSevere Thunderstorm WarningGRRNewaygo48 min
Apr 11, 7:27 PM EDTSevere Thunderstorm WarningGRRMuskegon, Ottawa48 min
Apr 11, 7:35 PM EDTTornado WarningGRROttawa40 min
Apr 11, 7:51 PM EDTTornado WarningGRRMuskegon24 min

Nearby

Flash Flood Warnings in Michigan, 2001Every 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.