Alert archive / Michigan / Tornado Warnings in 2007

Tornado Warning 4, NWS Grand Rapids, MI

July 9, 2007Clare County, Isabella County, Michigan

NWS Grand Rapids, MI issued this tornado warning at Jul 9, 2007, 3:41 PM EDT for Clare County, Isabella County, Michigan. It was in force for 18 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: Jul 9, 2007, 3:41 PM EDT (19:41 UTC)
Expired: Jul 9, 2007, 3:59 PM EDT
In force: 18 min
Issued by: NWS Grand Rapids, MI
Area: Counties, with a storm outline in the text

Counties Clare County, MI, Isabella County, MI

The radar

The NCL Michigan radar (KAPX), 119 km from the middle of the area, began a volume at 19:41 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jul 9, 2:36 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 7.7 hours before the alert went out and 163 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: 677 J/kg
Mixed-layer CIN: -151 J/kg
Mixed-layer LCL: 1377 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KGRR 091941
TORGRR
MIC035-073-092015-
/O.NEW.KGRR.TO.W.0004.070709T1941Z-070709T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
341 PM EDT MON JUL 9 2007

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS
HAS ISSUED A

* TORNADO WARNING FOR...
  CLARE COUNTY IN CENTRAL MICHIGAN
  ISABELLA COUNTY IN CENTRAL MICHIGAN

* UNTIL 415 PM EDT

* AT 339 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM PRODUCING A TORNADO. THIS STORM WAS LOCATED
  OVER CLARE...AND MOVING EAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE... 
HERRICK AND LOOMIS.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT MONDAY
EVENING FOR SOUTHWESTERN MICHIGAN.

LAT...LON 4388 8480 4379 8486 4377 8461 4387 8461

$$

COBB

1 follow-up statement

000 
WWUS53 KGRR 091959
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
359 PM EDT MON JUL 9 2007

MIC035-073-092009-
/O.CAN.KGRR.TO.W.0004.000000T0000Z-070709T2015Z/
CLARE MI-ISABELLA MI-
359 PM EDT MON JUL 9 2007

...THE TORNADO WARNING FOR ISABELLA AND CLARE COUNTIES IS
CANCELLED...

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE
THUNDERSTORM WHICH PROMPTED THE WARNING HAS EXITED THE WARNED AREA.
THEREFORE THE TORNADO WARNING HAS BEEN CANCELLED.

LAT...LON 4388 8480 4379 8486 4377 8461 4387 8461

$$
TURNAGE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 1:44 PM EDT	Special Weather Statement	GRR	Clare, Isabella, Lake, Mason, Mecosta, Muskegon and 3 more	2 hr
Jul 9, 2:04 PM EDT	Severe Thunderstorm Warning	GRR	Mecosta, Newaygo, Oceana	56 min
Jul 9, 2:10 PM EDT	Severe Thunderstorm Warning	GRR	Lake	35 min
Jul 9, 2:31 PM EDT	Severe Thunderstorm Warning	GRR	Osceola	59 min
Jul 9, 2:42 PM EDT	Severe Thunderstorm Warning	GRR	Clare	63 min
Jul 9, 2:56 PM EDT	Severe Thunderstorm Warning	GRR	Isabella, Mecosta, Newaygo	64 min
Jul 9, 3:11 PM EDT	Tornado Warning	GRR	Clare, Isabella	34 min
Jul 9, 3:59 PM EDT	Severe Thunderstorm Warning	GRR	Gratiot	61 min

Nearby

Tornado Warnings in Michigan, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.