Severe Thunderstorm Warning 103, NWS Grand Rapids, MI

Issued

Oct 24, 2001, 3:43 AM EDT (07:43 UTC)

Expired

Oct 24, 2001, 4:30 AM EDT

In force

47 min

Issued by

NWS Grand Rapids, MI

Area

Whole counties

County Allegan County, MI

The Grand Rapids radar (KGRR), 51 km from the middle of the area, began a volume at 07:47 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.

388 
WUUS53 KGRR 240749
SVRGRR
MIC005-240830-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...RETRANSMISSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
343 AM EDT WED OCT 24 2001

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ALLEGAN COUNTY IN MICHIGAN

* UNTIL 430 AM EDT

* AT 343 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 9 MILES WEST OF SAUGATUCK...OR ABOUT 15 MILES
  WEST SOUTHWEST OF HOLLAND...MOVING EAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   SAUGATUCK...DOUGLAS...CASTLE PARK...MACATAWA AROUND 350 AM EDT
   FENNVILLE AROUND 355 AM EDT
   HAMILTON AROUND 400 AM EDT
   BURNIPS AROUND 410 AM EDT
   NORTH DORR AROUND 415 AM EDT
   DORR...HOPKINS AROUND 420 AM EDT

HAIL UP TO THE SIZE OF GOLFBALLS AND WINDS UP TO 70 MILES AN HOUR ARE
EXPECTED FROM THIS STORM. SEEK SHELTER IN A STURDY STRUCTURE UNTIL
THE STORM HAS PASSED.

$$

MEADE

NWS Grand Rapids, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 23, 10:15 PM EDT, 5 hours 28 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1015 PM EDT TUE OCT 23 2001

UPDATED FORECAST ISSUED AT 945 PM EDT...WITH LOWERED CHANCES FOR
RAIN OVERNIGHT AND ADJUSTMENTS FOR NEARLY STEADY TEMPERATURES.

SFC LOW PRESSURE WAS OVER ERN SOUTH DAKOTA AS OF 02Z WITH AN
ILL-DEFINED SFC WARM FRONT EXTENDED EAST ACROSS SRN IA...NRN IL AND
NRN INDIANA. VERY MOIST AIRMASS IN PLACE ACROSS THE SRN GREAT LAKES
THIS EVENING WITH DEWPOINTS AROUND 60 DEGREES ACROSS SRN COUNTIES OF
THE STATE...WITH LOWER 50S AS FAR NORTH AS CENTRAL LOWER MICHIGAN.
LITTLE IF ANY PCPN FALLING TO OUR WEST ACROSS WI THIS EVENING...WITH
AN ISOLATED THUNDERSTORM DEVELOPING OVER FAR NWRN IL AS OF 02Z.

18Z MESOETA INDICATED DEVELOPMENT OF CONVECTION OVER NRN IL AND SRN
WI BETWEEN 03Z AND 06Z THIS EVENING IN AN AREA OF ISENTROPIC
LIFT...STRONG WARM ADVECTION...AND INCREASING LOW LEVEL JET WITH
THETA-E ADVECTION. AS SFC WARM FRONT LIFTS STARTS TO MOVE NORTHEAST
OVERNIGHT...THE MODEL DEPICTED THIS AREA OF CONVECTIVE ACTIVITY
MOVING INTO WRN LOWER MICHIGAN BY 09Z AND OVERSPREADING THE ENTIRE
FORECAST AREA BY 12Z. THIS SEEMS LIKE A REASONABLE SOLUTION AND THE
THUNDERSTORM OVER NWRN IL AS OF 02Z COULD BE THE BEGINNING OF THIS
CONVECTIVE DEVELOPMENT. WILL THEREFORE KEEP CHANCE OF RAIN IN OUR
FORECAST OVERNIGHT. DECREASED PROBABILITIES TO CHANCE CATEGORY AS IT
APPEARS THE WARM FRONT WILL NOT LIFT NORTH THROUGH THE FORECAST AREA
UNTIL AFTER 12Z WHEN MAIN PUSH OF LOW LEVEL JET ARRIVES. EXPECT
TEMPERATURES TO HOLD STEADY OVERNIGHT.

GREENE

.GRR...NONE.

Severe Thunderstorm Warnings in Michigan, 2001Every severe thunderstorm warning in 2001

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.