Alert archive / Michigan / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 40, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Oct 6, 2009, 9:32 PM EDT for 8 counties in Michigan. It was in force for 35 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
- Oct 6, 2009, 9:32 PM EDT (01:32 UTC)
- Expired
- Oct 6, 2009, 10:07 PM EDT
- In force
- 35 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
Counties Clare County, MI, Isabella County, MI, Lake County, MI, Mason County, MI, Mecosta County, MI, Newaygo County, MI, Oceana County, MI, Osceola County, MI
The radar
The Grand Rapids radar (KGRR), 101 km from the middle of the area, began a volume at 01:32 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, 1.5 hours before the alert went out and 212 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
- 20 J/kg
- Mixed-layer CIN
- -204 J/kg
- Mixed-layer LCL
- 464 m above ground
- 0-6 km bulk shear
- 86 kt
- 0-1 km storm-relative helicity
- 305 m²/s²
- 0-3 km storm-relative helicity
- 364 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Oct 6, 7:40 PM EDT, 1 hour 52 minutes earlier.
Area forecast discussion, Oct 6, 7:40 PM EDT, 1 hour 52 minutes before
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</html>Hazardous weather outlook, Oct 6, 6:06 PM EDT, 3 hours 26 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND RAPIDS MI 610 AM EDT TUE OCT 6 2009 MIZ037>040-043>046-050>052-056>059-064>067-071>074-071000- MASON-LAKE-OSCEOLA-CLARE-OCEANA-NEWAYGO-MECOSTA-ISABELLA-MUSKEGON- MONTCALM-GRATIOT-OTTAWA-KENT-IONIA-CLINTON-ALLEGAN-BARRY-EATON- INGHAM-VAN BUREN-KALAMAZOO-CALHOUN-JACKSON- 610 PM EDT TUE OCT 6 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...TONIGHT VERY WINDY CONDITIONS WILL DEVELOP TONIGHT. GUSTS TO 50 MPH ARE POSSIBLE ALONG THE LAKESHORE WITH 40 MPH GUSTS POSSIBLE INLAND. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY WINDY CONDITIONS WILL PERSIST WEDNESDAY MORNING BEFORE GRADUALLY SUBSIDING WEDNESDAY AFTERNOON. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. LMZ844>849-071000- 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- 610 PM EDT TUE OCT 6 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...TONIGHT CONDITIONS WILL WORSEN RAPIDLY EARLY THIS EVENING AS WINDS SHIFT TO THE WEST AND INCREASE TO 35 TO 45 KNOT GALES. WAVES TONIGHT WILL BUILD INTO THE 12 TO 16 FOOT RANGE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY GALE FORCE WINDS AND WAVES OF 12 FEET OR MORE WILL PERSIST WEDNESDAY MORNING BEFORE GRADUALLY SUBSIDING WEDNESDAY AFTERNOON. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. MEADE MJS
In the hours before
Local storm report, Oct 6, 5:55 PM EDT, 3 hours 37 minutes before
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</html>Local storm report, Oct 6, 7:34 PM EDT, 1 hour 58 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
734 PM EDT TUE OCT 06 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0550 PM NON-TSTM WND GST 4 W MUSKEGON 43.23N 86.34W
10/06/2009 M42.00 MPH MUSKEGON MI OTHER FEDERAL
GLERL OBSERVATION
0610 PM NON-TSTM WND GST 1 W SOUTH HAVEN 42.40N 86.29W
10/06/2009 M44.00 MPH VAN BUREN MI OTHER FEDERAL
GLERL OBSERVATION
&&
JKLocal storm report, Oct 6, 9:07 PM EDT, 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
907 PM EDT TUE OCT 06 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0855 PM NON-TSTM WND GST 1 W SOUTH HAVEN 42.40N 86.29W
10/06/2009 M48 MPH VAN BUREN MI OTHER FEDERAL
GLERL OBSERVATION
&&
JKSpecial weather statement, Oct 6, 9:12 PM EDT, 20 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
912 PM EDT TUE OCT 6 2009
MIZ051-052-056>059-064>067-071>074-070245-
ALLEGAN-BARRY-CALHOUN-CLINTON-EATON-GRATIOT-INGHAM-IONIA-JACKSON-
KALAMAZOO-KENT-MONTCALM-OTTAWA-VAN BUREN-
912 PM EDT TUE OCT 6 2009
...SIGNIFICANT WEATHER ADVISORY...
AT 911 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A BROKEN LINE OF STRONG THUNDERSTORMS EXTENDING FROM CEDAR SPRINGS
TO 9 MILES SOUTHWEST OF ALLEGAN...MOVING EAST AT 50 MPH.
* LOCATIONS IN THE PATH OF THESE STORMS INCLUDE...
BREEDSVILLE... BLOOMINGDALE... ALPINE...
COMSTOCK PARK... GRANDVILLE... BELMONT...
WYOMING... BYRON CENTER... CEDAR SPRINGS...
ROCKFORD... GRAND RAPIDS... BURNIPS...
ALLEGAN... EAST GRAND RAPIDS... GOBLES...
DORR... CUTLERVILLE... HOPKINS...
THESE STORMS ARE CAPABLE OF PRODUCING SMALL HAIL...STRONG WIND
GUSTS...OCCASIONAL CLOUD TO GROUND LIGHTNING...AND BRIEF DOWNPOURS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE
OBJECTS 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 4230 8413 4232 8610 4328 8557 4337 8437
4278 8436 4278 8415
TIME...MOT...LOC 0111Z 270DEG 44KT 4319 8550 4241 8593
MJSSpecial weather statement, Oct 6, 9:13 PM EDT, 19 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 913 PM EDT TUE OCT 6 2009 MIZ037>040-043>046-070245- CLARE-ISABELLA-LAKE-MASON-MECOSTA-NEWAYGO-OCEANA-OSCEOLA- 913 PM EDT TUE OCT 6 2009 ...SIGNIFICANT WEATHER ADVISORY... AT 911 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM FREESOIL TO 20 MILES SOUTH OF FREESOIL...MOVING EAST AT 50 MPH. * LOCATIONS IN THE PATH OF THESE STORMS INCLUDE... SCOTTVILLE... FREESOIL... CUSTER... FOUNTAIN... CRYSTAL VALLEY... MEADE TWP... WALHALLA... ELK TWP... LOGAN TWP... BRANCH... SAUBLE TWP... IRONS... SWEETWATER TWP... TROY TWP... LAKE TWP... BALDWIN... NEWKIRK TWP... IDLEWILD... THESE STORMS ARE CAPABLE OF PRODUCING SMALL HAIL...STRONG WIND GUSTS...OCCASIONAL CLOUD TO GROUND LIGHTNING...AND BRIEF DOWNPOURS. PRECAUTIONARY/PREPAREDNESS ACTIONS... GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE OBJECTS 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 4417 8460 4380 8461 4374 8645 4418 8624 TIME...MOT...LOC 0113Z 263DEG 48KT 4417 8613 4384 8628 MJS
Local storm report, Oct 6, 9:23 PM EDT, 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
923 PM EDT TUE OCT 06 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0916 PM HAIL 2 SW KENTWOOD 42.88N 85.61W
10/06/2009 M0.25 INCH KENT MI AMATEUR RADIO
SKYWARN REPORTS HAIL AT 52ND AND KALAMAZOO IN KENTWOOD.
0915 PM NON-TSTM WND GST 1 W SOUTH HAVEN 42.40N 86.29W
10/06/2009 M62 MPH VAN BUREN MI OTHER FEDERAL
GLERL OBSERVATION AT SOUTH HAVEN.
0915 PM NON-TSTM WND GST 4 W MUSKEGON 43.23N 86.34W
10/06/2009 M49 MPH MUSKEGON MI OTHER FEDERAL
WIND REPORTED AT THE MUSKEGON GLERL SITE.
&&
GWETZELThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 6, 9:12 PM EDT | Special Weather Statement | GRR | Barry, Clinton, Eaton, Gratiot, Ingham, Ionia and 1 more | 93 min |
| Oct 6, 9:13 PM EDT | Special Weather Statement | GRR | Clare, Lake, Osceola | 92 min |
| Oct 6, 9:50 PM EDT | High Wind Warning | GRR | Allegan, Muskegon, Ottawa, Van Buren | 6 hr |
| Oct 6, 9:56 PM EDT | Storm Warning | GRR | 6 hr | |
| Oct 7, 10:32 AM EDT | Small Craft Advisory | GRR | 36 hr |
Nearby
Severe Thunderstorm Warnings in Michigan, 2009Every severe thunderstorm warning in 2009
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.