Alert archive / Michigan / Special Weather Statements in 2011
Special Weather Statement, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this special weather statement at Jul 18, 2011, 3:13 AM EDT for Allegan County, Kent County, Ottawa County, 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
- Jul 18, 2011, 3:13 AM EDT (07:13 UTC)
- Expired
- Jul 18, 2011, 5:15 AM EDT
- In force
- 2 hr
- Issued by
- NWS Grand Rapids, MI
Counties Allegan County, MI, Kent County, MI, Ottawa County, MI
The radar
The Grand Rapids radar (KGRR), 27 km from the middle of the area, began a volume at 07:15 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, 7.2 hours before the alert went out and 249 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
- 3989 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 1231 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 2.2
- Supercell composite
- 17.3
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>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 18, 1:27 AM EDT, 1 hour 46 minutes earlier.
Area forecast discussion, Jul 18, 1:27 AM EDT, 1 hour 46 minutes before
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</html>Hazardous weather outlook, Jul 17, 1:47 PM EDT, 13 hours 26 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND RAPIDS MI 147 PM EDT SUN JUL 17 2011 MIZ037>040-043>046-050>052-056>059-064>067-071>074-180900- MASON-LAKE-OSCEOLA-CLARE-OCEANA-NEWAYGO-MECOSTA-ISABELLA-MUSKEGON- MONTCALM-GRATIOT-OTTAWA-KENT-IONIA-CLINTON-ALLEGAN-BARRY-EATON- INGHAM-VAN BUREN-KALAMAZOO-CALHOUN-JACKSON- 147 PM EDT SUN JUL 17 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE POSSIBLE OVERNIGHT ACROSS ALL OF SOUTHWEST LOWER MICHIGAN. THUNDERSTORM COMPLEXES UPSTREAM OF LOWER MICHIGAN THIS AFTERNOON AND EVENING OVER MINNESOTA AND WISCONSIN WILL MOVE SOUTHEAST WITH TIME. THE STORMS WILL TRY TO CROSS LAKE MICHIGAN OVERNIGHT. SOME OF THE STORMS MAY REACH STRONG TO SEVERE LEVELS WITH TORRENTIAL RAIN AND DAMAGING WINDS BEING THE MAIN THREATS... ESPECIALLY TOWARD THE LAKE MICHIGAN SHORELINE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY HEAT AND HUMIDITY WILL CONTINUE TO BUILD THROUGH THE COURSE OF THE UPCOMING WORK WEEK. HIGHS WILL LIKELY PUSH INTO THE 90S EACH DAY AWAY FROM LAKE MICHIGAN. MONDAY AND TUESDAY MAY BE AFFECTED BY PERIODS OF THUNDERSTORMS THOUGH WHICH MAY ALLEVIATE THE HEAT DURING THE AFTERNOON. HEAT INDEX VALUES MAY CREST THE 100 DEGREE MARK THIS WEEK...ESPECIALLY FROM WEDNESDAY THROUGH FRIDAY. A WEAK FRONTAL BOUNDARY WILL OSCILLATE THROUGH THE REGION MONDAY AND TUESDAY WITH ADDITIONAL THUNDERSTORMS POSSIBLE. SOME OF THE STORMS MAY REACH SEVERE LEVELS MONDAY AFTERNOON AND EVENING DEPENDING ON THE AMOUNT OF CLOUDS AND PRECIPITATION AFFECTING THE AREA DURING THE MORNING. THE MAIN THREAT FROM STORMS EARLY THIS WEEK WILL LIKELY BE LOCALLY VERY HEAVY RAINS. A FLASH FLOOD THREAT EXISTS GIVEN A VERY HUMID AIR MASS IN PLACE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED FROM EARLY MONDAY INTO TUESDAY EVENING. LMZ844>849-180900- 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- 147 PM EDT SUN JUL 17 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...TODAY AND TONIGHT THERE IS THE THREAT FOR STRONG THUNDERSTORMS OVERNIGHT. THE STRONGEST OF STORMS MAY CONTAIN DAMAGING WINDS AND VERY HEAVY RAIN. LOCALLY HIGHER WAVES CAN BE EXPECTED IN AND NEAR THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY A THREAT FOR STRONG THUNDERSTORMS CONTINUES MONDAY INTO TUESDAY AS A FRONTAL BOUNDARY MEANDERS ACROSS THE AREA. AREAS OF DENSE FOG CAN BE EXPECTED OUT ON LAKE MICHIGAN FOR MUCH OF THE UPCOMING WEEK AS A VERY MOIST AIR MASS MOVES OUT OVER THE RELATIVELY COOLER WATERS OF LAKE MICHIGAN. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED FROM EARLY MONDAY INTO TUESDAY EVENING. WDM/DUKE
In the hours before
Special weather statement, Jul 18, 1:51 AM EDT, 1 hour 22 minutes before
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</html>Local storm report, Jul 18, 2:13 AM EDT, 1 hour before
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</html>Local storm report, Jul 18, 2:28 AM EDT, 45 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 17, 11:35 PM EDT | Special Marine Warning | GRR | 115 min | |
| Jul 18, 12:46 AM EDT | Severe Thunderstorm Warning | GRR | Mason, Oceana | 67 min |
| Jul 18, 12:57 AM EDT | Special Weather Statement | GRR | Lake, Mecosta, Muskegon, Newaygo, Osceola, Ottawa | 2 hr |
| Jul 18, 1:03 AM EDT | Special Marine Warning | GRR | 117 min | |
| Jul 18, 1:51 AM EDT | Special Weather Statement | GRR | Clare, Isabella | 69 min |
| Jul 18, 2:06 AM EDT | Special Weather Statement | GRR | Allegan, Barry, Gratiot, Ionia, Kent, Montcalm | 114 min |
| Jul 18, 2:56 AM EDT | Special Marine Warning | GRR | 69 min | |
| Jul 18, 3:55 AM EDT | Special Weather Statement | GRR | Allegan | 65 min |
| Jul 18, 10:59 AM EDT | Heat Advisory | GRR | Allegan, Barry, Calhoun, Clinton, Eaton, Ingham and 5 more | 9 hr |
| Jul 18, 12:26 PM EDT | Special Weather Statement | GRR | Lake, Mecosta, Newaygo | 79 min |
| Jul 18, 1:30 PM EDT | Severe Thunderstorm Warning | GRR | Mecosta, Montcalm | 31 min |
| Jul 18, 1:37 PM EDT | Special Weather Statement | GRR | Clare, Isabella, Mecosta, Osceola | 53 min |
| Jul 18, 2:24 PM EDT | Special Weather Statement | GRR | Ingham, Jackson | 66 min |
| Jul 18, 4:07 PM EDT | Excessive Heat Watch | GRR | Allegan, Barry, Calhoun, Clare, Clinton, Eaton and 17 more | 12 hr |
| Jul 18, 5:31 PM EDT | Special Weather Statement | GRR | Ingham | 59 min |
| Jul 18, 5:53 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Ingham | 67 min |
Nearby
Special Weather Statements in Michigan, 2011Every special weather statement 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.