Alert archive / Michigan / Special Weather Statements in 2013

Special Weather Statement, NWS Grand Rapids, MI

August 7, 20134 counties in Michigan

NWS Grand Rapids, MI issued this special weather statement at Aug 7, 2013, 2:28 AM EDT for 4 counties in Michigan. It was in force for 2 hr. 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 7, 2013, 2:28 AM EDT (06:28 UTC)
Expired: Aug 7, 2013, 4:30 AM EDT
In force: 2 hr
Issued by: NWS Grand Rapids, MI

Counties Lake County, MI, Mason County, MI, Newaygo County, MI, Oceana County, MI

The radar

The Grand Rapids radar (KGRR), 108 km from the middle of the area, began a volume at 06:32 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 6.5 hours before the alert went out and 176 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: 424 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1453 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 138 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Rapids, MI wrote its last area forecast discussion before this special weather statement went out at Aug 6, 11:37 PM EDT, 2 hours 51 minutes earlier.

Area forecast discussion, Aug 6, 11:37 PM EDT, 2 hours 51 minutes before

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Hazardous weather outlook, Aug 6, 7:33 PM EDT, 6 hours 55 minutes before

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In the hours before

Special weather statement, Aug 7, 2:28 AM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
228 AM EDT WED AUG 7 2013

MIZ037-038-043-044-070830-
LAKE-MASON-NEWAYGO-OCEANA-
228 AM EDT WED AUG 7 2013

...SIGNIFICANT WEATHER ADVISORY...

AT 226 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS 40 MILES WEST OF BIG SABLE POINT...MOVING EAST
SOUTHEAST AT 50 MPH.

WIND GUSTS GREATER THAN 50 MPH...FREQUENT CLOUD TO GROUND
LIGHTNING...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
  LUDINGTON...          PENTWATER...          BALDWIN...
  NEWAYGO...            FREESOIL...           SHELBY...
  IRONS...              BITELY...             FREMONT...
  LUTHER...             WHITE CLOUD...        BIG SABLE POINT...
  LAKE MICHIGAN RECREATION AREA...            HAMLIN LAKE...
  LUDINGTON STATE PARK...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE
OBJECTS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS
TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS
PASSED.

&&

LAT...LON 4416 8556 4329 8557 4329 8604 4347 8604
      4347 8647 4366 8654 4377 8645 4383 8643
      4406 8653 4418 8639
TIME...MOT...LOC 0627Z 289DEG 43KT 4413 8727

LAURENS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 2:21 AM EDT	Special Marine Warning	GRR		114 min
Aug 7, 2:51 AM EDT	Severe Thunderstorm Warning	GRR	Mason, Oceana	54 min
Aug 7, 3:20 AM EDT	Severe Thunderstorm Warning	GRR	Lake, Mecosta	55 min
Aug 7, 8:06 AM EDT	Special Marine Warning	GRR		54 min
Aug 7, 8:16 AM EDT	Severe Thunderstorm Warning	GRR	Van Buren	59 min
Aug 7, 8:42 AM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Kalamazoo	63 min
Aug 7, 8:46 AM EDT	Areal Flood Advisory	GRR	Van Buren	4 hr
Aug 7, 1:28 PM EDT	Special Weather Statement	GRR	Barry, Eaton	62 min
Aug 7, 2:35 PM EDT	Special Weather Statement	GRR	Eaton	55 min

Nearby

Special Weather Statements in Michigan, 2013 Every special weather statement 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.