Alert archive / Michigan / Excessive Heat Warnings in 2011
Excessive Heat Warning 1, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this excessive heat warning at Jul 19, 2011, 4:00 AM EDT for 19 counties in Michigan. It took effect at Jul 19, 2011, 10:00 AM EDT. It was in force for 59 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 19, 2011, 4:00 AM EDT (08:00 UTC)
- In effect from
- Jul 19, 2011, 10:00 AM EDT
- Expired
- Jul 21, 2011, 9:19 PM EDT
- In force
- 59 hr
- Issued by
- NWS Grand Rapids, MI
Counties Allegan County, MI, Barry County, MI, Calhoun 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, Mecosta County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Ottawa County, MI, Van Buren County, MI
The radar
The Grand Rapids radar (KGRR), 17 km from the middle of the area, began a volume at 08:04 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, 8.0 hours before the alert went out and 157 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.
- Mixed-layer CAPE
- 1993 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 1085 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 182 m²/s²
- 0-3 km storm-relative helicity
- 267 m²/s²
- Significant tornado parameter
- 2.1
- Supercell composite
- 12.7
What forecasters said that day
The local office's own words before this excessive heat 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 excessive heat warning went out at Jul 19, 12:35 AM EDT, 3 hours 25 minutes earlier.
Area forecast discussion, Jul 19, 12:35 AM EDT, 3 hours 25 minutes before
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HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND RAPIDS MI 800 PM EDT MON JUL 18 2011 MIZ037>040-043>046-050>052-056>059-064>067-071>074-190900- MASON-LAKE-OSCEOLA-CLARE-OCEANA-NEWAYGO-MECOSTA-ISABELLA-MUSKEGON- MONTCALM-GRATIOT-OTTAWA-KENT-IONIA-CLINTON-ALLEGAN-BARRY-EATON- INGHAM-VAN BUREN-KALAMAZOO-CALHOUN-JACKSON- 800 PM EDT MON JUL 18 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...TONIGHT THERE IS A LOW CHANCE OF THUNDERSTORMS TONIGHT AHEAD OF A SOUTHWARD MOVING WEAK COLD FRONT. SEVERE STORMS ARE NOT EXPECTED. HOWEVER...ANY STORM THAT DOES DEVELOP WILL BE CAPABLE OF PRODUCING VERY HEAVY RAINFALL AND WIND GUSTS TO 40 MPH. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY HEAT AND HUMIDITY WILL REMAIN IN PLACE THROUGH THE COURSE OF THE WEEK AND POTENTIALLY INTO NEXT WEEKEND. HIGHS WILL LIKELY PUSH INTO THE 90S EACH DAY. THE WARMEST DAYS ARE EXPECTED TO BE WEDNESDAY AND THURSDAY. HEAT INDEX VALUES NEAR OR OVER 100 DEGREES ARE QUITE POSSIBLE EACH AFTERNOON FOR THE NEXT 6 TO 7 DAYS. THERE IS THE POTENTIAL FOR ADDITIONAL THUNDERSTORMS LATE IN THE WEEK AND INTO THE WEEKEND AS ANOTHER FRONTAL SYSTEM GETS CLOSE TO THE AREA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED. LMZ844>849-190900- 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- 800 PM EDT MON JUL 18 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...TONIGHT THERE IS A LOW CHANCE OF THUNDERSTORMS TONIGHT AHEAD OF A SOUTHWARD MOVING WEAK COLD FRONT. WHILE SEVERE STORMS ARE NOT EXPECTED...ANY THUNDERSTORM THAT DOES DEVELOP COULD PRODUCE WIND GUSTS TO 35 KNOTS. DENSE FOG IS POSSIBLE THROUGH TONIGHT AS VERY MOIST AIR MOVES OVER THE COOLER WATERS OF LAKE MICHIGAN. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY DENSE FOG WILL REMAIN POSSIBLE THROUGH MOST OF THIS WEEK AS VERY MOIST AIR REMAINS IN PLACE OVER THE COOLER WATERS OF LAKE MICHIGAN. THERE IS THE CHANCE OF MORE THUNDERSTORMS FRIDAY INTO SUNDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED. WDM/DUKE/93
In the hours before
Special weather statement, Jul 18, 11:32 PM EDT, 4 hours 28 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1132 PM EDT MON JUL 18 2011
MIZ071>074-190530-
CALHOUN-JACKSON-KALAMAZOO-VAN BUREN-
1132 PM EDT MON JUL 18 2011
...SIGNIFICANT WEATHER ADVISORY...
AT 1129 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM SOUTH HAVEN TO
BATTLE CREEK...MOVING SOUTHEAST AT 20 MPH.
WINDS GREATER THAN 30 MPH...FREQUENT CLOUD TO GROUND LIGHTNING...
BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THESE STORMS. LOCALLY
MORE THAN AN INCH OF RAIN COULD ACCOMPANY THE PASSAGE OF THESE
STORMS.
* THUNDERSTORMS WILL BE NEAR...
MENTHA AND NORTHWOOD BY 1140 PM EDT...
WATTLES PARK BY 1145 PM EDT...
BEADLE LAKE BY 1150 PM EDT...
COMSTOCK BY 1155 PM EDT...
PARTELLO AND ARMSTRONG CORNERS BY MIDNIGHT EDT...
TOQUIN AND DUCK LAKE BY 1205 AM EDT...
RICE CREEK AND ALMENA BY 1210 AM EDT...
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 THESE STORMS HAVE PASSED.
&&
LAT...LON 4207 8622 4224 8622 4225 8636 4242 8628
4242 8472 4211 8471 4207 8466
TIME...MOT...LOC 0332Z 311DEG 18KT 4241 8634 4233 8516
MJSLocal storm report, Jul 19, 12:14 AM EDT, 3 hours 46 minutes before
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</html>Local storm report, Jul 19, 12:16 AM EDT, 3 hours 44 minutes before
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</html>The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 11:32 PM EDT | Special Weather Statement | GRR | Calhoun, Kalamazoo, Van Buren | 118 min |
| Jul 18, 11:51 PM EDT | Special Marine Warning | GRR | 39 min | |
| Jul 18, 11:59 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun, Kalamazoo, Van Buren | 69 min |
| Jul 19, 1:13 AM EDT | Special Weather Statement | GRR | Barry | 62 min |
| Jul 19, 1:16 AM EDT | Special Weather Statement | GRR | Van Buren | 44 min |
| Jul 19, 1:33 AM EDT | Areal Flood Advisory | GRR | Van Buren | 5 hr |
| Jul 19, 4:00 AM EDT | Heat Advisory | GRR | Clare, Gratiot, Isabella, Lake, Mason, Mecosta and 5 more | 16 hr |
| Jul 19, 4:12 PM EDT | Small Craft Advisory | GRR | 43 hr | |
| Jul 19, 4:30 PM EDT | Excessive Heat Watch | GRR | Clare, Gratiot, Isabella, Lake, Mason, Mecosta and 5 more | 11 hr |
Nearby
Excessive Heat Warnings in Michigan, 2011Every excessive heat warning in 2011
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.