Alert archive / Michigan / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 45, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jul 15, 2010, 4:29 PM EDT for Calhoun County, Jackson County, Kalamazoo County, Michigan. It was in force for 46 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
- Jul 15, 2010, 4:29 PM EDT (20:29 UTC)
- Expired
- Jul 15, 2010, 5:15 PM EDT
- In force
- 46 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Calhoun County, MI, Jackson County, MI, Kalamazoo County, MI
The radar
The Grand Rapids radar (KGRR), 85 km from the middle of the area, began a volume at 20:30 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 15, 1:30 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 8.5 hours before the alert went out and 138 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
- 115 J/kg
- Mixed-layer CIN
- -137 J/kg
- Mixed-layer LCL
- 1003 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 94 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 Jul 15, 2:04 PM EDT, 2 hours 25 minutes earlier.
Area forecast discussion, Jul 15, 2:04 PM EDT, 2 hours 25 minutes before
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</html>Hazardous weather outlook, Jul 15, 1:05 PM EDT, 3 hours 24 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAND RAPIDS MI 105 PM EDT THU JUL 15 2010 MIZ037>040-043>046-050>052-056>059-064>067-071>074-161100- MASON-LAKE-OSCEOLA-CLARE-OCEANA-NEWAYGO-MECOSTA-ISABELLA-MUSKEGON- MONTCALM-GRATIOT-OTTAWA-KENT-IONIA-CLINTON-ALLEGAN-BARRY-EATON- INGHAM-VAN BUREN-KALAMAZOO-CALHOUN-JACKSON- 105 PM EDT THU JUL 15 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...TODAY AND TONIGHT A SLIGHT RISK OF SEVERE WEATHER EXISTS THIS AFTERNOON AND EARLY EVENING SOUTH AND EAST OF A MUSKEGON TO CADILLAC LINE. THE MAIN THREATS ARE STRONG DAMAGING WINDS IN EXCESS OF 60 MPH AND TORRENTIAL RAIN WITH LOCALIZED ONE TO TWO INCH PER HOUR RAINFALL RATES. CELL MOVEMENT WILL BE EAST NORTHEAST AT AROUND 40 MPH. HEAT INDEX VALUES WILL PUSH TOWARD 100 DEGREES THIS AFTERNOON ACROSS SOUTHERN LOWER MICHIGAN. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS CHANCE OF THUNDERSTORMS ON SUNDAY AND SUNDAY NIGHT. SOME OF THESE STORMS MAY BE SEVERE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL LIKELY BE NEEDED FROM 2 PM TO 9 PM... ESPECIALLY EAST OF HIGHWAY 131. LMZ844>849-161100- 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- 105 PM EDT THU JUL 15 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST LOWER MICHIGAN. .DAY ONE...TODAY AND TONIGHT STRONG TO SEVERE STORMS ARE EXPECTED TODAY...WITH THE HIGHEST THREAT BEING SOUTH OF WHITEHALL. STORMS WILL BE CAPABLE OF STRONG WINDS IN EXCESS OF 50 KNOTS...TORRENTIAL RAINS AND CLOUD TO WATER LIGHTNING STRIKES. A VERY HUMID AIR MASS WILL LEAD TO AREAS OF FOG AND HAZE ON LAKE MICHIGAN WHICH MAY REDUCE VISIBILITIES TO BELOW A MILE. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS CHANCE OF THUNDERSTORMS ON SUNDAY AND SUNDAY NIGHT. SOME OF THESE STORMS MAY BE SEVERE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED FROM 2 PM TO 6 PM. DUKE/MEADE
In the hours before
Local storm report, Jul 15, 3:18 PM EDT, 1 hour 11 minutes before
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</html>Local storm report, Jul 15, 3:21 PM EDT, 1 hour 8 minutes before
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</html>Special weather statement, Jul 15, 3:56 PM EDT, 33 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 356 PM EDT THU JUL 15 2010 MIZ059-152100- CLINTON- 356 PM EDT THU JUL 15 2010 ...SIGNIFICANT WEATHER ADVISORY... AT 354 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER EAST CENTRAL CLINTON COUNTY...MOVING NORTHEAST AT 30 MPH. NICKEL SIZE HAIL...WINDS UP TO 50 MPH...CONTINUOUS CLOUD TO GROUND LIGHTNING...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THIS STORM. 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 THIS STORM HAS PASSED. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT THURSDAY EVENING FOR SOUTHWESTERN MICHIGAN. && LAT...LON 4296 8450 4306 8452 4305 8436 4301 8436 TIME...MOT...LOC 1956Z 245DEG 25KT 4303 8439 OSTUNO
Local storm report, Jul 15, 4:01 PM EDT, 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
401 PM EDT THU JUL 15 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0356 PM TSTM WND GST BATTLE CREEK 42.32N 85.19W
07/15/2010 M62 MPH CALHOUN MI ASOS
&&
MKALEMBKSpecial weather statement, Jul 15, 4:26 PM EDT, 3 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
426 PM EDT THU JUL 15 2010
MIZ059-067-152130-
CLINTON-INGHAM-
426 PM EDT THU JUL 15 2010
...SIGNIFICANT WEATHER ADVISORY...
AT 425 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES SOUTHEAST OF LANSING...MOVING EAST AT 30
MPH.
ONE HALF INCH DIAMETER HAIL...WINDS UP TO 50 MPH...FREQUENT CLOUD TO
GROUND LIGHTNING...BRIEF HEAVY DOWNPOURS...ARE POSSIBLE WITH THIS
STORM.
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 THIS STORM HAS
PASSED. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM
EDT THURSDAY EVENING FOR SOUTHWESTERN MICHIGAN.
&&
LAT...LON 4260 8460 4272 8460 4280 8436 4278 8436
4278 8415 4265 8414
TIME...MOT...LOC 2027Z 254DEG 24KT 4269 8449
OSTUNOLocal storm report, Jul 15, 4:29 PM EDT, 0 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
429 PM EDT THU JUL 15 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0428 PM TSTM WND GST 3 E BATTLE CREEK 42.32N 85.14W
07/15/2010 E60 MPH CALHOUN MI TRAINED SPOTTER
REPORTS OF NUMEROUS TREES AND POWER LINES DOWN.
&&
MKALEMBKThe office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 10:31 PM EDT | Special Marine Warning | GRR | 104 min | |
| Jul 15, 2:13 AM EDT | Special Marine Warning | GRR | 107 min | |
| Jul 15, 4:02 AM EDT | Special Marine Warning | GRR | 88 min | |
| Jul 15, 4:44 AM EDT | Special Weather Statement | GRR | Allegan, Ottawa | 61 min |
| Jul 15, 9:07 AM EDT | Special Weather Statement | GRR | Muskegon | 53 min |
| Jul 15, 9:53 AM EDT | Special Weather Statement | GRR | Mecosta | 67 min |
| Jul 15, 12:43 PM EDT | Special Weather Statement | GRR | Clare, Osceola | 62 min |
| Jul 15, 2:21 PM EDT | Special Weather Statement | GRR | Gratiot | 54 min |
| Jul 15, 2:49 PM EDT | Severe Thunderstorm Warning | GRR | Gratiot | 25 min |
| Jul 15, 3:16 PM EDT | Severe Thunderstorm Warning | GRR | Clinton, Gratiot | 44 min |
| Jul 15, 3:42 PM EDT | Severe Thunderstorm Warning | GRR | Clinton | 35 min |
| Jul 15, 3:49 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun | 41 min |
| Jul 15, 3:56 PM EDT | Special Weather Statement | GRR | Clinton | 64 min |
| Jul 15, 4:08 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun, Kalamazoo | 52 min |
| Jul 15, 4:26 PM EDT | Special Weather Statement | GRR | Ingham | 64 min |
| Jul 15, 4:34 PM EDT | Areal Flood Advisory | GRR | Calhoun, Jackson | 6 hr |
| Jul 15, 5:00 PM EDT | Flash Flood Warning | GRR | Calhoun, Ingham, Jackson | 6 hr |
| Jul 15, 5:16 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun, Ingham, Jackson | 44 min |
| Jul 15, 6:18 PM EDT | Special Weather Statement | GRR | Kalamazoo | 57 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 2010Every severe thunderstorm warning in 2010
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.