Alert archive / Michigan / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 25, NWS Grand Rapids, MI

May 30, 2013Calhoun County, Michigan

NWS Grand Rapids, MI issued this severe thunderstorm warning at May 30, 2013, 6:18 PM EDT for Calhoun County, Michigan. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 30, 2013, 6:18 PM EDT (22:18 UTC)
Expired: May 30, 2013, 7:00 PM EDT
In force: 42 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Calhoun County, MI

The radar

The Grand Rapids radar (KGRR), 84 km from the middle of the area, began a volume at 22:21 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, 10.3 hours before the alert went out and 140 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: 226 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 1346 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at May 30, 3:45 PM EDT, 2 hours 33 minutes earlier.

Area forecast discussion, May 30, 3:45 PM EDT, 2 hours 33 minutes before

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Hazardous weather outlook, May 30, 4:20 PM EDT, 1 hour 58 minutes before

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In the hours before

Special weather statement, May 30, 12:48 PM EDT, 5 hours 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1248 PM EDT THU MAY 30 2013

MIZ037>040-043>046-050>052-056>059-064>067-071>074-301900-
MASON-LAKE-OSCEOLA-CLARE-OCEANA-NEWAYGO-MECOSTA-ISABELLA-MUSKEGON-
MONTCALM-GRATIOT-OTTAWA-KENT-IONIA-CLINTON-ALLEGAN-BARRY-EATON-
INGHAM-VAN BUREN-KALAMAZOO-CALHOUN-JACKSON-
INCLUDING THE CITIES OF...LUDINGTON...BALDWIN...REED CITY...CLARE...
HART...FREMONT...BIG RAPIDS...MOUNT PLEASANT...MUSKEGON...
GREENVILLE...ALMA...JENISON...GRAND RAPIDS...IONIA...ST. JOHNS...
HOLLAND...HASTINGS...CHARLOTTE...LANSING...SOUTH HAVEN...KALAMAZOO...
BATTLE CREEK...JACKSON
1248 PM EDT THU MAY 30 2013

...SIGNIFICANT WEATHER ADVISORY...

SCATTERED THUNDERSTORMS WILL DEVELOP ACROSS SOUTHWEST LOWER MICHIGAN
THROUGH 2 PM. THE BEST CHANCES FOR THUNDERSTORMS WILL BE EAST OF A
HOLLAND TO REED CITY LINE.

MOST STORMS WILL BE ACCOMPANIED BY BRIEF HEAVY DOWNPOURS AND GUSTY WINDS
BUT A FEW WILL BRING UP TO PENNY SIZED HAIL AND FREQUENT CLOUD-
TO-GROUND LIGHTNING.

TJT

Local storm report, May 30, 2:27 PM EDT, 3 hours 51 minutes before

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Local storm report, May 30, 4:12 PM EDT, 2 hours 6 minutes before

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Local storm report, May 30, 4:22 PM EDT, 1 hour 56 minutes before

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Local storm report, May 30, 4:37 PM EDT, 1 hour 41 minutes before

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Local storm report, May 30, 4:55 PM EDT, 1 hour 23 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 3:23 AM EDT	Small Craft Advisory	GRR		48 hr
May 30, 11:29 AM EDT	River Flood Advisory	GRR	Barry	71 hr
May 30, 1:28 PM EDT	Beach Hazards Statement	GRR	Mason, Muskegon, Oceana	38 hr
May 30, 2:07 PM EDT	Severe Thunderstorm Warning	GRR	Clare	38 min
May 30, 3:07 PM EDT	Severe Thunderstorm Warning	GRR	Isabella	38 min
May 30, 3:48 PM EDT	Severe Thunderstorm Warning	GRR	Newaygo	57 min
May 30, 6:59 PM EDT	Severe Thunderstorm Warning	GRR	Eaton	61 min

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.