Alert archive / Michigan / Tornado Warnings in 2003

Tornado Warning 8, NWS Grand Rapids, MI

August 25, 2003Calhoun County, Michigan

NWS Grand Rapids, MI issued this tornado warning at Aug 25, 2003, 11:04 PM EDT for Calhoun County, Michigan. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 25, 2003, 11:04 PM EDT (03:04 UTC)
Expired: Aug 25, 2003, 11:30 PM EDT
In force: 26 min
Issued by: NWS Grand Rapids, MI
Area: Counties, with a storm outline in the text

County Calhoun County, MI

The radar

The Grand Rapids radar (KGRR), 88 km from the middle of the area, began a volume at 03:04 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.

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 3.1 hours before the alert went out and 141 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: 1653 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1167 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KGRR 260304
TORGRR
MIC025-260330-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1103 PM EDT MON AUG 25 2003

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

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

* UNTIL 1130 PM EDT

* AT 1100 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH A POSSIBLE TORNADO OVER CERESCO...OR ABOUT
  6 MILES SOUTHWEST OF MARSHALL...MOVING SOUTHEAST AT 25 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
   HOMER AROUND 1125 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 4232 8508 4216 8520 4209 8490 4216 8473

$$

MEADE JK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 10:38 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun	52 min
Aug 25, 11:29 PM EDT	Severe Thunderstorm Warning	GRR	Jackson	46 min
Aug 25, 11:38 PM EDT	Tornado Warning	GRR	Jackson	37 min
Aug 26, 4:26 AM EDT	Special Marine Warning	GRR		79 min
Aug 26, 4:26 AM EDT	Special Marine Warning	GRR		79 min
Aug 26, 5:07 AM EDT	Severe Thunderstorm Warning	GRR	Allegan, Ottawa	38 min
Aug 26, 5:46 AM EDT	Severe Thunderstorm Warning	GRR	Ionia	44 min
Aug 26, 2:31 PM EDT	Special Marine Warning	GRR		59 min

Nearby

Tornado Warnings in Michigan, 2003 Every tornado warning in 2003 Tornadoes in 2003

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; radar from the NEXRAD Level II archive.