Alert archive / Michigan / Tornado Warnings in 2002

Tornado Warning 4, NWS Grand Rapids, MI

July 27, 2002Calhoun County, Michigan

NWS Grand Rapids, MI issued this tornado warning at Jul 27, 2002, 10:25 PM EDT for Calhoun County, Michigan. It was in force for 65 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 27, 2002, 10:25 PM EDT (02:25 UTC)
Expired: Jul 27, 2002, 11:30 PM EDT
In force: 65 min
Issued by: NWS Grand Rapids, MI
Area: Counties, with a storm outline in the text

County Calhoun County, MI

What was reported inside it

Time	Report	Where	Remark
Jul 27, 10:30 PM EDT	Tornado F1	Ft Custer, 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 nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 2.4 hours before the alert went out and 143 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: 269 J/kg
Mixed-layer CIN: -84 J/kg
Mixed-layer LCL: 1134 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 217 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.9

Open this sounding in Storm Lab

The text

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

065 
WFUS53 KGRR 280225
TORGRR
MIC025-280330-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1024 PM EDT SAT JUL 27 2002

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* TORNADO WARNING FOR...
  CALHOUN COUNTY IN SOUTH CENTRAL MICHIGAN

* UNTIL 1130 PM EDT

* AT 1021 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM PRODUCING A TORNADO APPROACHING                
  SPRINGFIELD...OR ABOUT 5 MILES NORTHWEST OF BATTLE CREEK...MOVING  
  SOUTHEAST AT 35 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
   BATTLE CREEK AROUND 1030 PM EDT
   CERESCO AROUND 1030 PM EDT
   MARSHALL AROUND 1035 PM EDT
   MARENGO AROUND 1040 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.


LAT...LON 4239 8528 4230 8528 4212 8484 4239 8478

EJO KWG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 8:38 PM EDT	Severe Thunderstorm Warning	GRR	Allegan	37 min
Jul 27, 8:46 PM EDT	Tornado Warning	GRR	Allegan	29 min
Jul 27, 9:15 PM EDT	Tornado Warning	GRR	Allegan	30 min
Jul 27, 9:31 PM EDT	Severe Thunderstorm Warning	GRR	Barry	59 min
Jul 27, 9:48 PM EDT	Tornado Warning	GRR	Allegan, Kalamazoo	27 min
Jul 28, 2:26 AM EDT	Special Marine Warning	GRR		49 min
Jul 28, 2:26 AM EDT	Special Marine Warning	GRR		49 min

Nearby

Tornado Warnings in Michigan, 2002 Every tornado warning in 2002 Tornadoes in 2002

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.