Alert archive / Michigan / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 13, NWS Grand Rapids, MI

May 9, 2007Clare County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at May 9, 2007, 5:26 PM EDT for Clare County, Michigan. It was in force for 49 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: May 9, 2007, 5:26 PM EDT (21:26 UTC)
Expired: May 9, 2007, 6:15 PM EDT
In force: 49 min
Issued by: NWS Grand Rapids, MI
Area: Counties, with a storm outline in the text

County Clare County, MI

The radar

The NCL Michigan radar (KAPX), 94 km from the middle of the area, began a volume at 21:26 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
May 9, 6:02 PM EDT	HAIL 0.25	3 Nw Harrison, MI

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Alpena, MI (KAPX), launched 12:00Z, 9.4 hours before the alert went out and 227 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: 22 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 1442 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 68 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 
WUUS53 KGRR 092127
SVRGRR
MIC035-092215-
/O.NEW.KGRR.SV.W.0013.070509T2126Z-070509T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
526 PM EDT WED MAY 9 2007

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS
HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLARE COUNTY IN CENTRAL MICHIGAN

* UNTIL 615 PM EDT

* AT 525 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED OVER WINTERFIELD      
  TOWNSHIP...OR ABOUT 17 MILES NORTHEAST OF EVART...AND MOVING EAST  
  AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
TEMPLE...LEOTA AND HARRISON

HAIL UP TO THE SIZE OF A NICKEL IS EXPECTED FROM THIS STORM. SEEK
SHELTER IN A STURDY STRUCTURE UNTIL THE STORM HAS PASSED.

LAT...LON 4417 8462 4400 8462 4400 8487 4400 8493
      4400 8503 4400 8508 4411 8508 4412 8509
      4417 8509

$$

NJJ

2 follow-up statements

000 
WWUS53 KGRR 092151
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
551 PM EDT WED MAY 9 2007

MIC035-092215-
/O.CON.KGRR.SV.W.0013.000000T0000Z-070509T2215Z/
CLARE MI-
551 PM EDT WED MAY 9 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR CLARE COUNTY...

AT 549 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR HARRISON...OR ABOUT
16 MILES NORTH OF CLARE...AND MOVING EAST AT 25 MPH.

HAIL UP TO THE SIZE OF A NICKEL IS EXPECTED FROM THIS STORM. SEEK
SHELTER IN A STURDY STRUCTURE UNTIL THE STORM HAS PASSED.

LAT...LON 4417 8462 4400 8462 4400 8487 4400 8493
      4400 8503 4400 8508 4411 8508 4412 8509
      4417 8509

$$
NJJ

000 
WWUS53 KGRR 092215
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
615 PM EDT WED MAY 9 2007

MIC035-092230-
/O.EXP.KGRR.SV.W.0013.000000T0000Z-070509T2215Z/
CLARE MI-
615 PM EDT WED MAY 9 2007

...THE SEVERE THUNDERSTORM WARNING FOR CLARE COUNTY HAS EXPIRED...

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE
THUNDERSTORM WHICH PROMPTED THE WARNING HAS WEAKENED AND IS NO LONGER
SEVERE. THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN ALLOWED TO
EXPIRE.

LAT...LON 4417 8462 4400 8462 4400 8487 4400 8493
      4400 8503 4400 8508 4411 8508 4412 8509
      4417 8509

$$
NJJ

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 3:38 AM EDT	Special Weather Statement	GRR	Kalamazoo	52 min
May 9, 4:40 AM EDT	Special Weather Statement	GRR	Calhoun	50 min
May 9, 4:46 AM EDT	Special Weather Statement	GRR	Eaton	44 min
May 9, 7:31 AM EDT	Special Weather Statement	GRR	Eaton, Ingham	29 min
May 9, 8:07 AM EDT	Special Weather Statement	GRR	Jackson	23 min
May 9, 5:12 PM EDT	Special Weather Statement	GRR	Clare	33 min
May 9, 6:22 PM EDT	Special Weather Statement	GRR	Clare, Isabella	68 min
May 9, 7:44 PM EDT	Special Weather Statement	GRR	Gratiot	31 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2007 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.