Alert archive / Michigan / Heat Advisories in 2012

Heat Advisory 1, NWS Grand Rapids, MI

June 27, 201223 counties in Michigan

NWS Grand Rapids, MI issued this heat advisory at Jun 27, 2012, 3:20 PM EDT for 23 counties in Michigan. It took effect at Jun 28, 2012, 12:00 PM EDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Jun 27, 2012, 3:20 PM EDT (19:20 UTC)
In effect from
Jun 28, 2012, 12:00 PM EDT
Expired
Jun 28, 2012, 9:00 PM EDT
In force
9 hr
Issued by
NWS Grand Rapids, MI
All 23 counties

Allegan County, MI, Barry County, MI, Calhoun County, MI, Clare County, MI, Clinton County, MI, Eaton County, MI, Gratiot County, MI, Ingham County, MI, Ionia County, MI, Isabella County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Lake County, MI, Mason County, MI, Mecosta County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Osceola County, MI, Ottawa County, MI, Van Buren County, MI

The radar

The Grand Rapids radar (KGRR), 27 km from the middle of the area, began a volume at 19:19 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, 7.3 hours before the alert went out and 165 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-pSkew-T log-p diagram, Detroit, MI at 12:00Z on 2012-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 12:00Z on 2012-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2007 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
174 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 heat advisory 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 heat advisory went out at Jun 27, 1:30 PM EDT, 1 hour 50 minutes earlier.

Area forecast discussion, Jun 27, 1:30 PM EDT, 1 hour 50 minutes before
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Hazardous weather outlook, Jun 27, 10:54 AM EDT, 4 hours 26 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1054 AM EDT WED JUN 27 2012

MIZ037>040-043>046-050>052-056>059-064>067-071>074-280945-
MASON-LAKE-OSCEOLA-CLARE-OCEANA-NEWAYGO-MECOSTA-ISABELLA-MUSKEGON-
MONTCALM-GRATIOT-OTTAWA-KENT-IONIA-CLINTON-ALLEGAN-BARRY-EATON-
INGHAM-VAN BUREN-KALAMAZOO-CALHOUN-JACKSON-
1054 AM EDT WED JUN 27 2012

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

.DAY ONE...TODAY AND TONIGHT

FIRE DANGER WILL BECOME VERY ELEVATED THIS AFTERNOON AND EVENING
WITH VERY WARM...DRY AND BREEZY CONDITIONS. THE HIGHEST FIRE DANGER
WILL BE NORTHWEST OF A LINE FROM HOLLAND TO REED CITY.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NEAR RECORD TEMPERATURES WELL INTO THE 90S ARE EXPECTED ON
THURSDAY. HEAT INDEX VALUES AWAY FROM LAKE MICHIGAN MAY PUSH
TOWARDS 100 DEGREES.

THUNDERSTORMS ARE POSSIBLE THURSDAY AFTERNOON AND EVENING IN THE
HOT AND HUMID AIR MASS. THUNDERSTORM PROBABILITIES OVERALL ARE
LOW...BUT IF STORMS DO DEVELOP SEVERE WEATHER IS A THREAT.

FIRE DANGER WILL LIKELY REMAIN ELEVATED INTO NEXT WEEK AS A
PERSISTENT HOT AND DRY PATTERN IS FORECAST TO CONTINUE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

LMZ844>849-280945-
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-
1054 AM EDT WED JUN 27 2012

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

.DAY ONE...TODAY AND TONIGHT

WINDS AND WAVES WILL INCREASE THIS AFTERNOON INTO THIS EVENING.
WAVES OF 2 TO 4 FEET ARE EXPECTED NORTH OF GRAND HAVEN POSING A
MODERATE SWIM HAZARD RISK.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THUNDERSTORMS ARE POSSIBLE THURSDAY AFTERNOON AND EVENING...SOME
OF WHICH MAY BE SEVERE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

DUKE NJJ

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 27, 9:49 AM EDTRed Flag WarningGRRAllegan, Clare, Clinton, Gratiot, Ionia, Isabella and 11 more11 hr
Jun 27, 3:33 PM EDTSmall Craft AdvisoryGRR7 hr

Nearby

Heat Advisories in Michigan, 2012Every heat advisory 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.