Alert archive / Michigan / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 21, NWS Grand Rapids, MI

May 29, 2013Eaton County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at May 29, 2013, 12:25 AM EDT for Eaton County, Michigan. It was in force for 65 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: May 29, 2013, 12:25 AM EDT (04:25 UTC)
Expired: May 29, 2013, 1:30 AM EDT
In force: 65 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Eaton County, MI

The radar

The Grand Rapids radar (KGRR), 66 km from the middle of the area, began a volume at 04:26 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.

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 4.4 hours before the alert went out and 120 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: 1071 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 621 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 307 m²/s²
0-3 km storm-relative helicity: 431 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 10.8

Open this sounding in Storm Lab

The text

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

280 
WUUS53 KGRR 290425
SVRGRR
MIC045-290530-
/O.NEW.KGRR.SV.W.0021.130529T0425Z-130529T0530Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1225 AM EDT WED MAY 29 2013

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EATON COUNTY IN SOUTH CENTRAL MICHIGAN...

* UNTIL 130 AM EDT

* AT 1222 AM EDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR
  CHARLOTTE...AND MOVING NORTHEAST AT 40 MPH.

  HAZARD...60 MPH WIND GUSTS.

  SOURCE...RADAR INDICATED.

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES.

* LOCATIONS IMPACTED INCLUDE...
  CHARLOTTE...          EATON RAPIDS...       GRAND LEDGE...
  BELLEVUE...           KALAMO...             BROOKFIELD...
  WAVERLY...            DIMONDALE...          OLIVET...
  VERMONTVILLE...       POTTERVILLE...        DELTA MILLS...
  MILLETT...            NEEDMORE...           WEST WINDSOR...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4242 8507 4244 8507 4263 8507 4277 8470
      4277 8461 4242 8460
TIME...MOT...LOC 0425Z 247DEG 36KT 4258 8480

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH

$$

MJS

1 follow-up statement

555 
WWUS53 KGRR 290504
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
104 AM EDT WED MAY 29 2013

MIC045-290514-
/O.CAN.KGRR.SV.W.0021.000000T0000Z-130529T0530Z/
EATON MI-
104 AM EDT WED MAY 29 2013

...THE SEVERE THUNDERSTORM WARNING FOR EATON COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED.

LAT...LON 4242 8507 4244 8507 4263 8507 4277 8470
      4277 8461 4242 8460
TIME...MOT...LOC 0504Z 247DEG 36KT 4273 8431

$$

WDM

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 10:36 PM EDT	River Flood Advisory	GRR	Clinton	37 hr
May 28, 10:36 PM EDT	Special Weather Statement	GRR	Allegan, Barry, Kalamazoo, Van Buren	54 min
May 28, 10:54 PM EDT	Severe Thunderstorm Warning	GRR	Kalamazoo, Van Buren	66 min
May 28, 11:11 PM EDT	Areal Flood Advisory	GRR	Calhoun, Kalamazoo, Van Buren	6 hr
May 28, 11:16 PM EDT	Tornado Warning	GRR	Barry, Calhoun, Kalamazoo	59 min
May 28, 11:31 PM EDT	Severe Thunderstorm Warning	GRR	Eaton	59 min
May 28, 11:46 PM EDT	Areal Flood Advisory	GRR	Barry, Clinton, Eaton, Ingham	6 hr
May 28, 11:59 PM EDT	Severe Thunderstorm Warning	GRR	Barry, Calhoun, Kalamazoo	61 min
May 29, 12:13 AM EDT	Special Marine Warning	GRR		62 min
May 29, 12:16 AM EDT	Special Weather Statement	GRR	Allegan, Muskegon, Ottawa	59 min
May 29, 12:35 AM EDT	Special Weather Statement	GRR	Clinton, Ingham, Jackson	55 min
May 29, 1:05 AM EDT	Special Weather Statement	GRR	Clare	25 min
May 29, 11:07 AM EDT	River Flood Advisory	GRR	Kent	35 hr
May 29, 11:07 AM EDT	River Flood Advisory	GRR	Clinton	7 days
May 29, 11:07 AM EDT	River Flood Advisory	GRR	Isabella	4 days
May 29, 3:51 PM EDT	Marine Dense Fog Advisory	GRR		19 hr

Nearby

Severe Thunderstorm Warnings in Michigan, 2013 Every severe thunderstorm warning in 2013

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.