Severe Thunderstorm Warning 94, NWS Grand Rapids, MI

Issued

Jul 21, 2003, 3:55 PM EDT (19:55 UTC)

Expired

Jul 21, 2003, 4:30 PM EDT

In force

35 min

Issued by

NWS Grand Rapids, MI

Area

Counties, with a storm outline in the text

County Calhoun County, MI

The Grand Rapids radar (KGRR), 89 km from the middle of the area, began a volume at 19:58 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.

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

621 
WUUS53 KGRR 211955
SVRGRR
MIC025-212030-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
355 PM EDT MON JUL 21 2003

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CALHOUN COUNTY IN SOUTH CENTRAL MICHIGAN

* UNTIL 430 PM EDT

* AT 353 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM FROM 11 MILES NORTH OF ALBION TO MARSHALL...OR
  FROM 8 MILES SOUTH OF EATON RAPIDS TO MARSHALL...MOVING EAST AT 35
  MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
   MARENGO AROUND 400 PM EDT
   ALBION AROUND 410 PM EDT

LARGE HAIL...DAMAGING WINDS...AND HEAVY RAIN ARE EXPECTED FROM THIS
STORM. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THE STORM HAS PASSED.

HAIL UP TO THREE-QUARTERS OF AN INCH IN DIAMETER AND WINDS GREATER
THAN 60 MILES AN HOUR ARE EXPECTED FROM THIS STORM. SEEK SHELTER IN A
STURDY STRUCTURE UNTIL THE STORM HAS PASSED.


LAT...LON 4234 8496 4242 8481 4243 8473 4215 8472
          4211 8466 4213 8479 4221 8509 4226 8517

$$

NJJ MWH

NWS Grand Rapids, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 21, 11:32 AM EDT, 4 hours 23 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1132 AM EDT MON JUL 21 2003

WILL NOT BE MAKING ANY CHANGES TO THE GOING FORECAST FOR THE TIME
BEING. LINE OF SHOWERS AND THUNDERSTORMS CURRENTLY MOVING SEWD OVER
THE NW COUNTIES. THIS LINE OF SHOWERS AND THUNDERSTORMS ASSOCIATED
WITH A SHORT WAVE THAT SHOWS UP VERY WELL ON THE WV IMAGERY OVER
NORTHERN LAKE MICHIGAN. THIS...IN COMBINATION WITH BREAKS IN THE
CLOUDS OVER THE LAND AREAS SHOULD ONLY HELP TO KEEP THESE SHOWERS
AND THUNDERSTORMS GOING.

NJJ

.GRR...NONE.

MIZ037>040-043>046-050>052-056>059-064>067-071>074-221000-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
210 PM EDT MON JUL 21 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE SOUTHWEST QUARTER OF LOWER
MICHIGAN.

.DAY ONE...TODAY AND TONIGHT

A SLIGHT RISK OF SEVERE WEATHER EXISTS THIS AFTERNOON AND EVENING
EAST OF A LINE FROM SOUTH HAVEN TO MOUNT PLEASANT. HAIL AS GREAT AS
THREE QUARTERS OF AN INCH IN DIAMETER OR WIND GUSTS TO 60 MPH ARE
POSSIBLE. TORRENTIAL RAIN WITH RAINFALL RATES OF 3 INCHES PER HOUR
IS POSSIBLE...AND COULD RESULT IN URBAN AND SMALL STREAM FLOODING.
STORM MOVEMENT WILL BE TO THE EAST SOUTHEAST AT 15 TO 20 MPH.

A LOW PRESSURE SYSTEM OVER ILLINOIS WILL TRACK EAST TODAY...TOUCHING
OFF THE SHOWERS AND THUNDERSTORMS.  AS THE STORM PULLS EAST OF THE
AREA TONIGHT...A MORE STABLE AIRMASS WILL FILTER INTO SOUTHWEST
LOWER MICHIGAN FROM THE NORTH.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

MORE THUNDERSTORMS ARE POSSIBLE SATURDAY OR SUNDAY AS A WARM FRONT
RETURNS TO THE AREA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

MJS MEADE

In the hours before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1227 PM EDT MON JUL 21 2003

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1215 PM    MUSKEGON                  MI   0.75 IN HAIL
07/21/03   MUSKEGON

NJJ

Severe Thunderstorm Warnings in Michigan, 2003Every severe thunderstorm warning in 2003

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.