Severe Thunderstorm Warning 49, NWS Grand Rapids, MI

Issued

Jun 21, 1996, 9:57 PM EDT (01:57 UTC)

Expired

Jun 21, 1996, 10:45 PM EDT

In force

48 min

Issued by

NWS Grand Rapids, MI

Area

Whole counties

County Clare County, MI

000 
TTAA00 KGRR 220156
SVRGRR
MIC035-220245-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
957 PM EDT FRI JUN 21 1996
 
THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1045 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL LOWER MICHIGAN
 
   ...CLARE COUNTY
 
AT 955 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE
OF SEVERE THUNDERSTORMS EXTENDING FROM TEMPLE TO FARWELL. THIS LINE WAS
MOVING SOUTHEAST AT 35 MPH AND IS EXPECTED TO MOVE INTO THE TOWN OF
CLARE BY 1005 PM.
 
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING. PERSONS IN THE WARNED AREA
SHOULD GET INTO A REINFORCED SHELTER AND PREPARE FOR DAMAGING
WINDS... LARGE HAIL AND DEADLY LIGHTNING.
 
TEW

NWS Grand Rapids, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 21, 1:20 PM EDT, 8 hours 37 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
125 PM EDT FRI JUN 21 1996

AFD WILL BE A LITTLE EARLY TODAY...TRYING TO KEEP UP ON SEVERE
WEATHER THREAT. IN THE SHORT TERM THE SFC RUC DATA SHOWS PRESSURE
FALLS, THETA ADVECTION AND MOISTURE CONVERGENCE OVER NRN IL/SRN WI.
CI/AC SHIELD HOLDING TEMPS DOWN A BIT...BUT HOLES ARE DEVELOPING
WEST OF LAKE MI.

12Z RUN INDICATES STRONG 850 MB JET MOVING INTO IL/WI AROUND 18Z.
AGEOSTROPHIC FLOW AROUND THE 250 MB JET PROVIDING SOME UPPER
LEVEL SUPPORT. THESE DYNAMICS ARE PROGGED TO MOVE EWD THROUGH THE
EVENING. 500 MB WINDS ARE RELATIVELY STRONG AND WITH E-W ORIENTATION
OF THE SFC BNDRY...DERECHO EVENT STILL A GOOD POSIBILITY. SFC HEATING
WILL BE KEY. THE MOST FAVORABLE DYNAMICS OCCUR OVER WESTERN MI NEAR
00Z. STRONG SFC MOISTURE CONVERGENCE ALONG WITH UPPER LEVEL DIVERGENCE
AND THE LOW LEVEL JET COMBINE OVER THE AREA. PCGRIDDS OVERLAY OF
CAPE AND HELICITY SHOW THE BEST AREAS FOR SVR WEATHER SHOULD BE
SOUTHWEST LOWER.

SFC COLD FRONT WILL MOVE INTO WRN MI AROUND 06Z. DYNAMICS SHOULD
BE EAST OF FCST AREA ATM. SHOWERS AND THUNDERSTORMS LIKELY FOR
TONIGHT IS A GOOD FORECAST. STORMS WILL DEFINTELY TAPER OFF AFTER
MIDNIGHT. FWC TEMPS LOOK REASONABLE.

GRR TB 068/083 1771
LAN TB 068/082 1771

END/GARNET

Severe Thunderstorm Warnings in Michigan, 1996Every severe thunderstorm warning in 1996

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.