Alert archive / Michigan / Special Weather Statements in 2012

Special Weather Statement, NWS Grand Rapids, MI

July 5, 2012Jackson County, Michigan

NWS Grand Rapids, MI issued this special weather statement at Jul 5, 2012, 2:42 PM EDT for Jackson County, Michigan. It was in force for 33 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: Jul 5, 2012, 2:42 PM EDT (18:42 UTC)
Expired: Jul 5, 2012, 3:15 PM EDT
In force: 33 min
Issued by: NWS Grand Rapids, MI

County Jackson County, MI

The radar

The Detroit radar (KDTX), 67 km from the middle of the area, began a volume at 18:43 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, 6.7 hours before the alert went out and 71 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: 279 J/kg
Mixed-layer CIN: -270 J/kg
Mixed-layer LCL: 2299 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 277 m²/s²
0-3 km storm-relative helicity: 345 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Jul 5, 1:28 PM EDT, 1 hour 14 minutes earlier.

Area forecast discussion, Jul 5, 1:28 PM EDT, 1 hour 14 minutes before

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Hazardous weather outlook, Jul 5, 11:02 AM EDT, 3 hours 40 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1102 AM EDT THU JUL 5 2012

LMZ844>849-MIZ037>040-043>046-050>052-056>059-064>067-071>074-
060930-
ST JOSEPH TO SOUTH HAVEN MI-SOUTH HAVEN TO HOLLAND MI-
HOLLAND TO GRAND HAVEN MI-GRAND HAVEN TO WHITEHALL MI-
WHITEHALL TO PENTWATER MI-PENTWATER TO MANISTEE MI-MASON-LAKE-
OSCEOLA-CLARE-OCEANA-NEWAYGO-MECOSTA-ISABELLA-MUSKEGON-MONTCALM-
GRATIOT-OTTAWA-KENT-IONIA-CLINTON-ALLEGAN-BARRY-EATON-INGHAM-
VAN BUREN-KALAMAZOO-CALHOUN-JACKSON-
1102 AM EDT THU JUL 5 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER
MICHIGAN.

.DAY ONE...LATE THIS AFTERNOON AND TONIGHT

STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE INTO EARLY THIS EVENING
SOUTH AND EAST OF INTERSTATE 69. THE MAIN THREAT IS DAMAGING
WINDS...LARGE HAIL...FREQUENT CLOUD TO GROUND LIGHTNING AND BRIEF
HEAVY RAINFALL. STORMS WILL MOVE SOUTHEAST AT 30 MPH.

HEAT INDICES WILL BE BETWEEN 100 DEGREES AND 110 DEGREES INTO EARLY
THIS EVENING INLAND OF ROUTE 31 UNTIL 8 PM.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

STRONG TO SEVERE STORMS ARE POSSIBLE SATURDAY.

HEAT INDICES WILL BE ABOVE 100 DEGREES FRIDAY AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED SATURDAY.

OSTUNO WDM

In the hours before

Local storm report, Jul 5, 12:10 PM EDT, 2 hours 32 minutes before

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Special weather statement, Jul 5, 2:38 PM EDT, 4 minutes before

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Special weather statement, Jul 5, 2:42 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
242 PM EDT THU JUL 5 2012

MIZ067-074-051915-
INGHAM-JACKSON-
242 PM EDT THU JUL 5 2012

...SIGNIFICANT WEATHER ADVISORY...

AT 239 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
RAPIDLY DEVELOPING THUNDERSTORM OVER SOUTHEASTERN INGHAM COUNTY...
MOVING SOUTHEAST AT 20 MPH.

ONE HALF INCH DIAMETER HAIL...WIND GUSTS GREATER THAN 40 MPH...
OCCASIONAL CLOUD TO GROUND LIGHTNING...BRIEF HEAVY DOWNPOURS...ARE
POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  MUNITH...             STOCKBRIDGE...        WATERLOO TWP...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS 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 4248 8440 4259 8421 4253 8413 4245 8414
      4239 8412 4221 8413
TIME...MOT...LOC 1842Z 321DEG 18KT 4246 8422

HOVING

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 12:10 AM EDT	Special Weather Statement	GRR	Lake, Mason, Osceola	65 min
Jul 5, 1:10 AM EDT	Special Weather Statement	GRR	Clare, Mecosta, Newaygo, Oceana, Osceola	65 min
Jul 5, 1:37 AM EDT	Severe Thunderstorm Warning	GRR	Lake, Mason, Mecosta, Newaygo, Oceana, Osceola	46 min
Jul 5, 2:16 AM EDT	Severe Thunderstorm Warning	GRR	Mecosta, Montcalm	59 min
Jul 5, 2:52 AM EDT	Severe Thunderstorm Warning	GRR	Clinton, Gratiot, Ionia, Isabella, Montcalm	53 min
Jul 5, 3:50 AM EDT	Severe Thunderstorm Warning	GRR	Ingham	25 min
Jul 5, 4:26 AM EDT	Special Weather Statement	GRR	Jackson	49 min
Jul 5, 2:38 PM EDT	Special Weather Statement	GRR	Eaton	52 min
Jul 5, 3:28 PM EDT	Special Weather Statement	GRR	Eaton, Ingham	47 min
Jul 5, 3:58 PM EDT	Severe Thunderstorm Warning	GRR	Ingham, Jackson	54 min

Nearby

Special Weather Statements in Michigan, 2012 Every special weather statement in 2012

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.