Alert archive / Michigan / Tornado Warnings in 2007
Tornado Warning 7, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this tornado warning at Aug 24, 2007, 4:04 PM EDT for Eaton County, Michigan. It was in force for 56 min. 7 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 24, 2007, 4:04 PM EDT (20:04 UTC)
- Expired
- Aug 24, 2007, 5:00 PM EDT
- In force
- 56 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Counties, with a storm outline in the text
County Eaton County, MI
The radar
The Grand Rapids radar (KGRR), 60 km from the middle of the area, began a volume at 20:07 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 24, 4:25 PM EDT | TSTM WND DMG | 2 N Charlotte, MI | BUILDING DAMAGE NEAR COCHRAN AND M50 |
| Aug 24, 4:25 PM EDT | TSTM WND DMG | 3 W Potterville, MI | 2 BARNS DESTROYED AND ANOTHER HEAVILY DAMAGED. NEAR OTTO AND VERMONTVILLE. |
| Aug 24, 4:25 PM EDT | TORNADO 3 | 1 Wnw Potterville, MI | *** 5 INJ *** 5 PEOPLE TREATED FOR INJURIES TORNADO DESTROYED ROUGHLY 15 HOMES ROOF AND HALF OF SECOND STORY ROOMS BLOW OFF OF ONE HOME PATH 6 AND ONE HALF MILES LONG AND 200 TO 300 YARDS WIDE MAXIMUM WINDS 140 MPH. |
| Aug 24, 4:25 PM EDT | TORNADO | 2 N Charlotte, MI | BUILDING DAMAGE NEAR COCHRAN AND M50 |
| Aug 24, 4:25 PM EDT | TORNADO | 3 W Potterville, MI | 2 BARNS DESTROYED AND ANOTHER HEAVILY DAMAGED. NEAR OTTO AND VERMONTVILLE. |
| Aug 24, 4:25 PM EDT | TORNADO | Potterville, MI | *** 5 INJ *** 5 PEOPLE TREATED FOR INJURIES AND 2 PEOPLE HOSPITALIZED AS TORNADO DESTROYED SEVERAL HOMES NEAR POTTERVILLE. |
| Aug 24, 4:30 PM EDT | HAIL 1 | 2 Nw Potterville, MI | NEAR OTTO AND DOAN |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 24, 4:04 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 8.1 hours before the alert went out and 119 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
- 26 J/kg
- Mixed-layer CIN
- -262 J/kg
- Mixed-layer LCL
- 963 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KGRR 242004 TORGRR MIC045-242100- /O.NEW.KGRR.TO.W.0007.070824T2004Z-070824T2100Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE GRAND RAPIDS MI 404 PM EDT FRI AUG 24 2007 THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A * TORNADO WARNING FOR... EATON COUNTY IN SOUTH CENTRAL MICHIGAN * UNTIL 500 PM EDT * AT 402 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THNUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS STORM WAS LOCATED 6 MILES NORTHWEST OF CHARLOTTE...AND MOVING EAST AT 40 MPH. * THE TORNADO WILL BE NEAR... CHARLOTTE BY 410 PM EDT POTTERVILLE BY 415 PM EDT GRAND LEDGE BY 420 PM EDT THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. LAT...LON 4275 8504 4250 8501 4253 8466 4275 8466 93 $$
2 follow-up statements
000 WWUS53 KGRR 242029 SVSGRR SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 429 PM EDT FRI AUG 24 2007 MIC045-242100- /O.CON.KGRR.TO.W.0007.000000T0000Z-070824T2100Z/ EATON MI- 429 PM EDT FRI AUG 24 2007 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM EDT FOR EATON COUNTY... AT 428 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STORM PRODUCING A TORNADO. THIS TORNADO WAS LOCATED NEAR POTTERVILLE...OR ABOUT NEAR CHARLOTTE...AND MOVING EAST AT 30 MPH. THE TORNADO WILL BE NEAR... WEST WINDSOR AND GRAND LEDGE BY 435 PM EDT DIMONDALE AND DELTA CENTER BY 440 PM EDT MILLETT BY 445 PM EDT LOCAL EMERGENCY MANAGEMENT INDICATES THAT THERE IS SOME BUILDING DAMAGE ABOUT 4 MILES NORTH OF CHARLOTTE. THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS. LAT...LON 4273 8500 4250 8501 4253 8462 4277 8461 $$ DUKE
000 WWUS53 KGRR 242058 SVSGRR SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAND RAPIDS MI 458 PM EDT FRI AUG 24 2007 MIC045-242108- /O.EXP.KGRR.TO.W.0007.000000T0000Z-070824T2100Z/ EATON MI- 458 PM EDT FRI AUG 24 2007 ...THE TORNADO WARNING FOR EATON COUNTY WILL BE ALLOWED TO EXPIRE... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE THUNDERSTORM WHICH PROMPTED THE WARNING HAS EXITED THE WARNED AREA. THEREFORE THE TORNADO WARNING HAS BEEN ALLOWED TO EXPIRE. LAT...LON 4273 8500 4250 8501 4253 8462 4277 8461 $$ DUKE
The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 3:57 PM EDT | Special Weather Statement | GRR | Clinton, Eaton | 63 min |
| Aug 24, 4:15 PM EDT | Special Weather Statement | GRR | Calhoun, Jackson | 30 min |
| Aug 24, 4:37 PM EDT | Severe Thunderstorm Warning | GRR | Ingham | 53 min |
| Aug 24, 4:42 PM EDT | Severe Thunderstorm Warning | GRR | Jackson | 63 min |
| Aug 24, 4:46 PM EDT | Tornado Warning | GRR | Ingham | 44 min |
Nearby
Tornado Warnings in Michigan, 2007Every tornado warning in 2007Tornadoes in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.