Alert archive / Michigan / Tornado Warnings in 2001

Tornado Warning 23, NWS Grand Rapids, MI

September 9, 2001Clinton County, Eaton County, Ingham County, Michigan

NWS Grand Rapids, MI issued this tornado warning at Sep 9, 2001, 6:45 PM EDT for Clinton County, Eaton County, Ingham County, Michigan. It was in force for 30 min. 2 reports 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: Sep 9, 2001, 6:45 PM EDT (22:45 UTC)
Expired: Sep 9, 2001, 7:15 PM EDT
In force: 30 min
Issued by: NWS Grand Rapids, MI
Area: Whole counties

Counties Clinton County, MI, Eaton County, MI, Ingham County, MI

The radar

The Grand Rapids radar (KGRR), 79 km from the middle of the area, began a volume at 22:44 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.

What was reported inside it

Time	Report	Where	Remark
Sep 9, 6:47 PM EDT	Tornado F1	Lansing, MI
Sep 9, 6:55 PM EDT	Thunderstorm Wind 53 E	De Witt, 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
Sep 9, 3:00 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 10.8 hours before the alert went out and 96 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: 401 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 666 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

756 
WFUS53 KGRR 092246
TORGRR
MIC037-045-065-092315-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
645 PM EDT SUN SEP 9 2001

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWEST INGHAM COUNTY IN SOUTH CENTRAL MICHIGAN
  CLINTON COUNTY IN SOUTH CENTRAL MICHIGAN
  NORTHEAST EATON COUNTY IN SOUTH CENTRAL MICHIGAN

* UNTIL 715 PM EDT

* AT 639 PM EDT...THE PUBLIC REPORTED A POSSIBLE TORNADO OVER        
  WAVERLY...OR ABOUT 3 MILES SOUTHWEST OF WAVERLY...MOVING NORTHEAST 
  AT 35 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
   LANSING AROUND 650 PM EDT
   DE WITT...HASLETT AROUND 655 PM EDT
   BATH AROUND 700 PM 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.

$$

MJS/GEO

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 8, 8:46 PM EDT	Severe Thunderstorm Warning	GRR	Ingham	44 min
Sep 9, 5:21 PM EDT	Severe Thunderstorm Warning	GRR	Kent	54 min
Sep 9, 5:30 PM EDT	Severe Thunderstorm Warning	GRR	Ionia	30 min
Sep 9, 6:02 PM EDT	Severe Thunderstorm Warning	GRR	Clare, Isabella, Mecosta	58 min
Sep 9, 6:02 PM EDT	Severe Thunderstorm Warning	GRR	Montcalm	58 min
Sep 9, 6:21 PM EDT	Severe Thunderstorm Warning	GRR	Gratiot	39 min
Sep 9, 6:28 PM EDT	Tornado Warning	GRR	Clare	32 min
Sep 9, 6:42 PM EDT	Severe Thunderstorm Warning	GRR	Jackson	48 min
Sep 9, 6:59 PM EDT	Severe Thunderstorm Warning	GRR	Clare	16 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; radar from the NEXRAD Level II archive.