Alert archive / Michigan / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 5, NWS Grand Rapids, MI

April 15, 1994Allegan County, Ottawa County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at Apr 15, 1994, 7:57 AM EDT for Allegan County, Ottawa County, Michigan. It was in force for 30 min.

The area

The counties it named.

The facts

Issued: Apr 15, 1994, 7:57 AM EDT (11:57 UTC)
Expired: Apr 15, 1994, 8:27 AM EDT
In force: 30 min
Issued by: NWS Grand Rapids, MI
Area: Whole counties

Counties Allegan County, MI, Ottawa County, MI

The nearest sounding before it

Dayton/James M C, OH (KDAY), launched 00:00Z, 12.0 hours before the alert went out and 353 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 332 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 2007 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Apr 15, 4:40 AM EDT, 3 hours 17 minutes before

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Special weather statement, Apr 15, 5:36 AM EDT, 2 hours 21 minutes before

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Special weather statement, Apr 15, 6:49 AM EDT, 1 hour 8 minutes before

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Special weather statement, Apr 15, 7:17 AM EDT, 40 minutes before

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Special weather statement, Apr 15, 7:20 AM EDT, 37 minutes before

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Special weather statement, Apr 15, 7:38 AM EDT, 19 minutes before

MIZ051-056-057-058-064-065-071-072-501-151230-

SPECIAL WEATHER STATEMENT
FOR SOUTHWEST LOWER MICHIGAN
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
737 AM EDT FRI APR 15 1994

...THUNDERSTORMS CONTINUED IN PART OF SOUTHWEST LOWER MICHIGAN...

AT 735 AM EDT... WEATHER RADAR INDICATED STRONG THUNDERSTORMS MOVING
ON SHORE NEAR SOUTH HAVEN... 35 MILES NORTHWEST OF KALAMAZOO AND NEAR
NUNICA AND COOPERSVILLE... 15 MILES NORTHWEST OF GRAND RAPIDS. THESE
STORMS MAY CONTAIN SMALL HAIL AND GUSTY WINDS OF 45 MPH. THE STORMS
WERE MOVING TOWARD THE NORTHEAST AT 25 MPH AND WILL REACH THE
COMMUNITIES OF PULLMAN BY 800 AM AND ALLEGAN BY 815 AM. THE STORM NEAR
COOPERSVILLE WILL REACH THE COMMUNITIES OF SPARTA BY 800 AM AND CEDAR
SPRINGS BY 830 AM.

THESE STORMS CONTAIN GUSTY WINDS AND DANGEROUS LIGHTNING. IF YOU ARE IN
THE PATH OF THESE STORMS YOU SHOULD MOVE INSIDE TO AVOID THE DANGERS OF
LIGHTNING.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 8:29 AM EDT	Severe Thunderstorm Warning	GRR	Montcalm	31 min
Apr 15, 8:54 AM EDT	Severe Thunderstorm Warning	GRR	Kent	49 min
Apr 15, 9:01 AM EDT	Severe Thunderstorm Warning	GRR	Montcalm	44 min
Apr 15, 9:46 AM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Eaton	59 min
Apr 15, 9:58 AM EDT	Severe Thunderstorm Warning	GRR	Ingham	47 min
Apr 15, 10:04 AM EDT	Severe Thunderstorm Warning	GRR	Gratiot	41 min
Apr 15, 10:37 AM EDT	Severe Thunderstorm Warning	GRR	Jackson	78 min
Apr 15, 10:37 AM EDT	Severe Thunderstorm Warning	GRR	Ingham	38 min

Nearby

Severe Thunderstorm Warnings in Michigan, 1994 Every severe thunderstorm warning in 1994

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.