Alert archive / Michigan / Tornado Warnings in 2007

Tornado Warning 22, NWS Grand Rapids, MI

October 19, 2007Ingham County, Michigan

NWS Grand Rapids, MI issued this tornado warning at Oct 19, 2007, 12:20 AM EDT for Ingham County, Michigan. It was in force for 25 min. 1 report 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: Oct 19, 2007, 12:20 AM EDT (04:20 UTC)
Expired: Oct 19, 2007, 12:45 AM EDT
In force: 25 min
Issued by: NWS Grand Rapids, MI
Area: Storm-based polygon

County Ingham County, MI

The radar

The Detroit radar (KDTX), 65 km from the middle of the area, began a volume at 04:21 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
Oct 19, 12:27 AM EDT	TSTM WND DMG	1 N Dansville, MI	TREES DOWN

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
Oct 18, 11:52 PM EDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 4.3 hours before the alert went out and 69 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 504 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 1038 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 354 m²/s²
0-3 km storm-relative helicity: 339 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 4.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS53 KGRR 190420
TORGRR
MIC065-190445-
/O.NEW.KGRR.TO.W.0022.071019T0420Z-071019T0445Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1220 AM EDT FRI OCT 19 2007

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS
HAS ISSUED A

* TORNADO WARNING FOR...
  INGHAM COUNTY IN SOUTH CENTRAL MICHIGAN

* UNTIL 1245 AM EDT

* AT 1217 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM PRODUCING A TORNADO. THIS STORM WAS LOCATED
  OVER LESLIE...OR ABOUT 8 MILES SOUTH OF MASON...AND MOVING
  NORTHEAST AT 65 MPH.

* THE TORNADO WILL BE NEAR...
  WILLIAMSTON BY 1230 AM 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM EDT FRIDAY MORNING FOR
SOUTH CENTRAL MICHIGAN.

LAT...LON 4243 8438 4248 8455 4279 8416 4278 8414
      4268 8414 4267 8413 4256 8414
TIME...MOT...LOC 0420Z 224DEG 58KT 4250 8437

$$

COBB

2 follow-up statements

000 
WWUS53 KGRR 190433
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1232 AM EDT FRI OCT 19 2007

MIC065-190445-
/O.CON.KGRR.TO.W.0022.000000T0000Z-071019T0445Z/
INGHAM MI-
1232 AM EDT FRI OCT 19 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1245 AM EDT FOR EASTERN
INGHAM COUNTY...

AT 1231 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STORM PRODUCING A TORNADO.  THIS TORNADO WAS LOCATED NEAR
DANSVILLE...OR ABOUT 10 MILES EAST OF MASON...AND MOVING NORTHEAST AT
50 MPH.

THE TORNADO WILL BE NEAR...
  WHITE OAK TOWNSHIP BY 1240 AM EDT
  WEBBERVILLE AND BELL OAK BY 1245 AM 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM EDT FRIDAY MORNING FOR
SOUTH CENTRAL MICHIGAN.

LAT...LON 4254 8416 4249 8430 4253 8441 4272 8425
      4274 8424 4278 8418 4278 8414 4268 8414
      4266 8412 4262 8413
TIME...MOT...LOC 0432Z 233DEG 42KT 4257 8424

$$
OSTUNO

000 
WWUS53 KGRR 190444
SVSGRR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1245 AM EDT FRI OCT 19 2007

MIC065-190455-
/O.EXP.KGRR.TO.W.0022.000000T0000Z-071019T0445Z/
INGHAM MI-
1245 AM EDT FRI OCT 19 2007

...THE TORNADO WARNING FOR EASTERN INGHAM 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 AM EDT FRIDAY MORNING FOR
SOUTH CENTRAL MICHIGAN.

LAT...LON 4254 8416 4249 8430 4253 8441 4272 8425
      4274 8424 4278 8418 4278 8414 4268 8414
      4266 8412 4262 8413
TIME...MOT...LOC 0445Z 233DEG 42KT 4266 8407

$$
OSTUNO

The office that day

Everything else NWS Grand Rapids, MI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 18, 8:01 PM EDT	Severe Thunderstorm Warning	GRR	Clare, Isabella	14 min
Oct 18, 8:01 PM EDT	Severe Thunderstorm Warning	GRR	Kalamazoo, Van Buren	21 min
Oct 18, 8:18 PM EDT	Severe Thunderstorm Warning	GRR	Kent, Muskegon, Ottawa	42 min
Oct 18, 8:19 PM EDT	Special Weather Statement	GRR	Newaygo	56 min
Oct 18, 8:28 PM EDT	Special Marine Warning	GRR		62 min
Oct 18, 8:30 PM EDT	Special Weather Statement	GRR	Gratiot	30 min
Oct 18, 8:41 PM EDT	Special Weather Statement	GRR	Mecosta, Montcalm, Newaygo	64 min
Oct 18, 8:45 PM EDT	Severe Thunderstorm Warning	GRR	Allegan, Ottawa	45 min
Oct 18, 8:48 PM EDT	Tornado Warning	GRR	Eaton, Ingham	27 min
Oct 18, 8:54 PM EDT	Severe Thunderstorm Warning	GRR	Montcalm	51 min
Oct 18, 8:56 PM EDT	Severe Thunderstorm Warning	GRR	Kalamazoo, Van Buren	49 min
Oct 18, 8:58 PM EDT	Severe Thunderstorm Warning	GRR	Allegan	27 min
Oct 18, 9:00 PM EDT	Severe Thunderstorm Warning	GRR	Kent	15 min
Oct 18, 9:02 PM EDT	Severe Thunderstorm Warning	GRR	Isabella, Mecosta	33 min
Oct 18, 9:09 PM EDT	Severe Thunderstorm Warning	GRR	Kent, Muskegon, Ottawa	51 min
Oct 18, 9:16 PM EDT	Severe Thunderstorm Warning	GRR	Calhoun, Kalamazoo, Van Buren	44 min
Oct 18, 9:20 PM EDT	Severe Thunderstorm Warning	GRR	Clare, Gratiot, Isabella, Montcalm	55 min
Oct 18, 9:37 PM EDT	Severe Thunderstorm Warning	GRR	Kent, Ottawa	38 min
Oct 18, 9:39 PM EDT	Severe Thunderstorm Warning	GRR	Kent, Montcalm	42 min
Oct 18, 9:59 PM EDT	Tornado Warning	GRR	Kalamazoo	31 min
Oct 18, 10:04 PM EDT	Tornado Warning	GRR	Calhoun, Eaton, Ingham, Jackson	26 min
Oct 18, 10:25 PM EDT	Tornado Warning	GRR	Calhoun	35 min
Oct 18, 10:27 PM EDT	Special Weather Statement	GRR	Isabella	33 min
Oct 18, 10:29 PM EDT	Tornado Warning	GRR	Ingham	16 min
Oct 18, 10:36 PM EDT	Severe Thunderstorm Warning	GRR	Clare, Isabella	24 min
Oct 18, 10:45 PM EDT	Tornado Warning	GRR	Ingham	15 min
Oct 18, 11:04 PM EDT	Severe Thunderstorm Warning	GRR	Eaton	21 min
Oct 18, 11:09 PM EDT	Tornado Warning	GRR	Calhoun	36 min
Oct 18, 11:25 PM EDT	Tornado Warning	GRR	Calhoun	38 min
Oct 18, 11:35 PM EDT	Severe Thunderstorm Warning	GRR	Eaton, Ingham	40 min
Oct 18, 11:52 PM EDT	Tornado Warning	GRR	Ingham, Jackson	23 min
Oct 19, 12:07 AM EDT	Severe Thunderstorm Warning	GRR	Ingham	38 min
Oct 19, 4:38 AM EDT	Wind Advisory	GRR	Allegan, Mason, Muskegon, Oceana, Ottawa, Van Buren	15 hr

Nearby

Tornado Warnings in Michigan, 2007 Every tornado warning in 2007 Tornadoes 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.