Alert archive / Michigan / Tornado Warnings in 2001

Tornado Warning 8, NWS Grand Rapids, MI

April 12, 2001Mecosta County, Michigan

NWS Grand Rapids, MI issued this tornado warning at Apr 12, 2001, 12:29 AM EDT for Mecosta County, Michigan. It was in force for 31 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Apr 12, 2001, 12:29 AM EDT (04:29 UTC)
Expired: Apr 12, 2001, 1:00 AM EDT
In force: 31 min
Issued by: NWS Grand Rapids, MI
Area: Whole counties

County Mecosta County, MI

What was reported inside it

Time	Report	Where	Remark
Apr 12, 12:30 AM EDT	Hail 1	Big Rapids, MI

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 12, 12:00 AM EDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 4.5 hours before the alert went out and 185 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: 156 J/kg
Mixed-layer CIN: -122 J/kg
Mixed-layer LCL: 557 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 196 m²/s²
0-3 km storm-relative helicity: 233 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

182 
WFUS53 KGRR 120429
TORGRR
MIC107-120500-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1229 AM EDT THU APR 12 2001

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* TORNADO WARNING FOR...
  MECOSTA COUNTY IN CENTRAL MICHIGAN

* UNTIL 100 AM EDT

* AT 1227 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO OVER MORLEY...OR ABOUT 12 MILES SOUTH OF BIG RAPIDS...
  MOVING NORTHEAST AT 50 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
   ALTONA AROUND 1235 AM EDT
   RODNEY AROUND 1240 AM EDT
   CHIPPEWA LAKE...MECOSTA AROUND 1245 AM EDT
   BARRYTON AROUND 1255 AM EDT

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 11, 8:06 PM EDT	Tornado Warning	GRR	Kent	29 min
Apr 11, 8:36 PM EDT	Severe Thunderstorm Warning	GRR	Mecosta, Montcalm	39 min
Apr 11, 9:51 PM EDT	Flash Flood Warning	GRR	Muskegon	3 hr
Apr 11, 11:21 PM EDT	Severe Thunderstorm Warning	GRR	Muskegon, Ottawa	39 min
Apr 11, 11:36 PM EDT	Severe Thunderstorm Warning	GRR	Newaygo	24 min
Apr 11, 11:45 PM EDT	Tornado Warning	GRR	Newaygo	30 min
Apr 11, 11:58 PM EDT	Tornado Warning	GRR	Muskegon	17 min
Apr 12, 12:09 AM EDT	Severe Thunderstorm Warning	GRR	Kent	36 min
Apr 12, 12:14 AM EDT	Severe Thunderstorm Warning	GRR	Mecosta, Montcalm	31 min
Apr 12, 12:19 AM EDT	Tornado Warning	GRR	Newaygo	26 min
Apr 12, 12:25 AM EDT	Severe Thunderstorm Warning	GRR	Osceola	35 min
Apr 12, 12:42 AM EDT	Severe Thunderstorm Warning	GRR	Clare, Isabella	48 min
Apr 12, 12:57 AM EDT	Tornado Warning	GRR	Clare, Osceola	33 min

Nearby

Tornado Warnings in Michigan, 2001 Every tornado warning in 2001 Tornadoes in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.