Alert archive / Michigan / Tornado Warnings in 2007

Tornado Warning 9, NWS Grand Rapids, MI

October 18, 2007Clare County, Osceola County, Michigan

NWS Grand Rapids, MI issued this tornado warning at Oct 18, 2007, 3:54 PM EDT for Clare County, Osceola County, Michigan. It was in force for 21 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
Oct 18, 2007, 3:54 PM EDT (19:54 UTC)
Expired
Oct 18, 2007, 4:15 PM EDT
In force
21 min
Issued by
NWS Grand Rapids, MI
Area
Storm-based polygon

Counties Clare County, MI, Osceola County, MI

The radar

The NCL Michigan radar (KAPX), 94 km from the middle of the area, began a volume at 19:56 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 12:00Z, 7.9 hours before the alert went out and 203 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-pSkew-T log-p diagram, Detroit, MI at 12:00Z on 2007-10-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 9 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 12:00Z on 2007-10-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
9 J/kg
Mixed-layer CIN
-154 J/kg
Mixed-layer LCL
923 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
199 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KGRR 181954
TORGRR
MIC035-133-182015-
/O.NEW.KGRR.TO.W.0009.071018T1954Z-071018T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
354 PM EDT THU OCT 18 2007

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS
HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN CLARE COUNTY IN CENTRAL MICHIGAN
  NORTHEASTERN OSCEOLA COUNTY IN CENTRAL MICHIGAN

* UNTIL 415 PM EDT

* AT 351 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM PRODUCING A TORNADO. THIS STORM WAS LOCATED 4
  MILES SOUTH OF MARION...OR ABOUT 12 MILES NORTHEAST OF EVART...AND
  MOVING NORTHEAST AT 20 MPH.

* THE TORNADO WILL BE NEAR...
  TEMPLE BY 400 PM EDT
  LEOTA BY 415 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 4418 8511 4418 8494 4407 8484 4393 8516
      4408 8530
TIME...MOT...LOC 1954Z 236DEG 19KT 4406 8513

$$

TURNAGE
1 follow-up statement
000 
WWUS53 KGRR 182010
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
410 PM EDT THU OCT 18 2007

MIC035-133-182020-
/O.EXP.KGRR.TO.W.0009.000000T0000Z-071018T2015Z/
OSCEOLA MI-CLARE MI-
410 PM EDT THU OCT 18 2007

...THE TORNADO WARNING FOR NORTHWESTERN CLARE AND NORTHEASTERN 
OSCEOLA WILL BE ALLOWED TO EXPIRE...

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

LAT...LON 4418 8511 4418 8494 4407 8484 4393 8516
      4408 8530
TIME...MOT...LOC 2010Z 236DEG 19KT 4411 8503

$$

LAURENS

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 18, 11:37 AM EDTWind AdvisoryGRRAllegan, Barry, Calhoun, Eaton, Ionia, Kalamazoo and 6 more6 hr
Oct 18, 2:52 PM EDTSpecial Weather StatementGRRClare, Isabella, Mecosta, Osceola38 min
Oct 18, 3:25 PM EDTSpecial Weather StatementGRROsceola35 min
Oct 18, 5:05 PM EDTSpecial Marine WarningGRR55 min
Oct 18, 5:52 PM EDTSpecial Weather StatementGRRMuskegon38 min
Oct 18, 6:22 PM EDTSpecial Weather StatementGRRLake38 min
Oct 18, 6:27 PM EDTSevere Thunderstorm WarningGRRKalamazoo18 min
Oct 18, 6:49 PM EDTSevere Thunderstorm WarningGRRBarry41 min
Oct 18, 6:55 PM EDTTornado WarningGRRBarry, Eaton, Ionia35 min
Oct 18, 7:02 PM EDTSpecial Weather StatementGRRClare, Lake, Osceola58 min
Oct 18, 7:14 PM EDTSevere Thunderstorm WarningGRROsceola31 min
Oct 18, 7:25 PM EDTTornado WarningGRRBarry, Clinton, Eaton, Ingham, Ionia35 min
Oct 18, 7:28 PM EDTSpecial Marine WarningGRR62 min
Oct 18, 7:53 PM EDTSpecial Weather StatementGRRIsabella37 min
Oct 18, 7:55 PM EDTSevere Thunderstorm WarningGRRAllegan, Ottawa50 min
Oct 18, 7:57 PM EDTTornado WarningGRRClinton33 min

Nearby

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