Severe Thunderstorm Warning 139, NWS Grand Rapids, MI

Issued

Aug 11, 2003, 2:56 PM EDT (18:56 UTC)

Expired

Aug 11, 2003, 4:00 PM EDT

In force

64 min

Issued by

NWS Grand Rapids, MI

Area

Counties, with a storm outline in the text

County Kalamazoo County, MI

The Grand Rapids radar (KGRR), 58 km from the middle of the area, began a volume at 18:58 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.

000 
WUUS53 KGRR 111856
SVRGRR
MIC077-112000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
255 PM EDT MON AUG 11 2003

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  KALAMAZOO COUNTY IN SOUTHWEST MICHIGAN

* UNTIL 400 PM EDT

* AT 253 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR AND TRAINED 
  SPOTTERS INDICATED A SEVERE THUNDERSTORM OVER COOPER...OR ABOUT 5  
  MILES NORTH OF WESTWOOD...MOVING WEST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   WESTWOOD AROUND 300 PM EDT
   ALAMO AROUND 310 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.

SEVERAL TREES WERE DOWN AND WIND GUST REPORTED AROUND 60 MPH AROUND 
345 PM.


LAT...LON 4243 8571 4243 8527 4234 8541 4224 8557
          4239 8577

$$

BEACH MWH

NWS Grand Rapids, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 11, 12:12 PM EDT, 2 hours 44 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1210 PM EDT MON AUG 11 2003

THE DIURNAL FLARE TO CONVECTION IS ONCE AGAIN OCCURRING...FOR WHAT
HAS BEEN MANY DAYS IN A ROW. UNSTABLE AIRMASS IN PLACE TODAY...WITH
SURFACE DEW POINTS AROUND +18 C COMBINING WITH 500MB TEMPS AROUND
-11 C. MORNING SOUNDINGS INDICATE CAPE VALUES ON THE ORDER OF 2000
J/KG AND LI/S DROPPING TO -6 WITH MAX HEATING. CONVERGENCE ALONG A
WEAK COOL FRONT THAT IS DRAPED ACROSS THE AREA IS AIDING
THUNDERSTORMS DEVELOPMENT...AS IS A SHORTWAVE SEEN DROPPING SOUTH
FROM THE LAKE SUPERIOR REGION.

SKIES WILL VARY BETWEEN PARTLY AND MOSTLY CLOUDY THROUGH THE
AFTERNOON WITH THE INSTABILITY RESULTING IN A CUMULUS FIELD ACROSS
THE AREA. HIGHS AND WINDS LOOK ON TRACK.

ZONES ALREADY SENT.

.GRR...NONE.

DUKE

MIZ037>040-043>046-050>052-056>059-064>067-071>074-121000-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1244 PM EDT MON AUG 11 2003

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

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS WILL BE POSSIBLE BOTH THIS AFTERNOON AND
TONIGHT ACROSS ALL OF THE SOUTHWEST QUARTER OF LOWER MICHIGAN.
THESE STORMS ARE NOT EXPECTED TO BE SEVERE...BUT WILL BE CAPABLE OF
PRODUCING HEAVY RAIN...CLOUD TO GROUND LIGHTNING STRIKES AND WIND
GUSTS TO 30 MPH. THE STRONGEST OF STORMS MAY PRODUCE PEA SIZE HAIL
AND WIND GUSTS TO 45 MPH. LOCALLY HEAVY RAIN LOOKS TO BE THE BIGGEST
THREAT AS STORMS WILL HAVE A FAIRLY SLOW MOVEMENT TO THE SOUTHWEST
AROUND 20 MPH.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THUNDERSTORMS ARE IN THE FORECAST AGAIN ON TUESDAY...ESPECIALLY
ACROSS SOUTHERN LOWER MICHIGAN. THESE STORMS ARE NOT ANTICIPATED TO
BE SEVERE EITHER. STORMS RETURN TO THE FORECAST FOR THE UPCOMING
WEEKEND ON SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH THE PERIOD.

DUKE

In the hours before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
0255 PM EDT MON AUG 11 2003

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

0245 PM    PARCHMENT                 MI   WIND DAMAGE
08/11/03   KALAMAZOO                      TREES DOWN D AVE AND
                                          RIVERVIEW

MJK

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.