Alert archive / Michigan / Tornado Warnings in 2007

Tornado Warning 41, NWS Northern Indiana

October 18, 2007Cass County, Saint Joseph County, Michigan

NWS Northern Indiana issued this tornado warning at Oct 18, 2007, 9:29 PM EDT for Cass County, Saint Joseph 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 outline as issued.

The facts

Issued: Oct 18, 2007, 9:29 PM EDT (01:29 UTC)
Expired: Oct 18, 2007, 10:15 PM EDT
In force: 46 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon

Counties Cass County, MI, Saint Joseph County, MI

The radar

The Northern Indiana radar (KIWX), 67 km from the middle of the area, began a volume at 01:30 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
Oct 18, 4:23 PM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 1.5 hours before the alert went out and 205 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 KIWX 190130
TORIWX
MIC027-149-190215-
/O.NEW.KIWX.TO.W.0041.071019T0129Z-071019T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORTHERN INDIANA
929 PM EDT THU OCT 18 2007

THE NATIONAL WEATHER SERVICE IN NORTHERN INDIANA HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL CASS COUNTY IN SOUTHWEST MICHIGAN
  NORTHERN ST. JOSEPH COUNTY IN SOUTHWEST MICHIGAN

* UNTIL 1015 PM EDT

* AT 925 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH STRONG ROTATION.  THIS SEVERE STORM WAS
  LOCATED NEAR DIAMOND LAKE...OR ABOUT 9 MILES SOUTHEAST OF
  DOWAGIAC...AND MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IN THE PATH OF THE SEVERE STORM INCLUDE...
  THREE RIVERS...
  CENTREVILLE...
  COLON...
  JONES...
  CLEAR LAKE AND COREY LAKE...
  HOWARDSVILLE...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
STRONG DAMAGING WINDS IN EXCESS OF 70 MPH AND HAIL UP TO GOLF BALL 
SIZE.

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.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 4201 8576 4207 8577 4207 8531 4190 8531
      4178 8598 4188 8605
TIME...MOT...LOC 0129Z 242DEG 38KT 4192 8592

$$

JC

2 follow-up statements

000 
WWUS53 KIWX 190146
SVSIWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
946 PM EDT THU OCT 18 2007

INC181-190156-
/O.CAN.KIWX.SV.W.0162.000000T0000Z-071019T0215Z/
WHITE IN-
946 PM EDT THU OCT 18 2007

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN WHITE COUNTY IS
CANCELLED...

AT 941 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT
THE LINE OF SEVERE THUNDERSTORMS WHICH PROMPTED THE WARNING HAD
MOVED OUT OF THE AREA AND NO LONGER POSES AN IMMEDIATE
THREAT TO LIFE OR PROPERTY. THEREFORE...THE SEVERE THUNDERSTORM
WARNING HAS BEEN CANCELLED.

IF YOU HAVE SEVERE WEATHER TO REPORT...YOU CAN CALL YOUR LOCAL LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT FRIDAY MORNING
FOR NORTHERN INDIANA AND SOUTHERN MICHIGAN.

LAT...LON 4117 8657 4118 8648 4111 8648 4110 8648
      4092 8649 4093 8683
TIME...MOT...LOC 0146Z 237DEG 45KT 4124 8632 4113 8646
          4097 8659

$$

INC131-190215-
/O.CON.KIWX.SV.W.0162.000000T0000Z-071019T0215Z/
PULASKI IN-
946 PM EDT THU OCT 18 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT
FOR EASTERN PULASKI COUNTY...

AT 941 PM EDT...A LINE OF SEVERE THUNDERSTORMS  WERE REPORTED CAPABLE
OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60
MPH. THESE SEVERE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 6
MILES NORTHEAST OF MONTEREY TO VANMETER PARK TO PULASKI...OR ALONG A
LINE EXTENDING FROM 11 MILES SOUTH OF PLYMOUTH TO 5 MILES NORTHEAST
OF WINAMAC TO 9 MILES SOUTH OF WINAMAC...AND MOVING NORTHEAST AT 50
MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LAWTON.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS LINE OF
SEVERE THUNDERSTORMS. WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY
STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A
PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

IF YOU HAVE SEVERE WEATHER TO REPORT...YOU CAN CALL YOUR LOCAL LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT FRIDAY MORNING
FOR NORTHERN INDIANA AND SOUTHERN MICHIGAN.

LAT...LON 4117 8657 4118 8648 4111 8648 4110 8648
      4092 8649 4093 8683
TIME...MOT...LOC 0146Z 237DEG 45KT 4124 8632 4113 8646
          4097 8659

$$

000 
WWUS53 KIWX 190207 RRA
SVSIWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
1007 PM EDT THU OCT 18 2007

MIC027-149-190217-
/O.EXP.KIWX.TO.W.0041.000000T0000Z-071019T0215Z/
ST. JOSEPH MI-CASS MI-
1007 PM EDT THU OCT 18 2007

...THE TORNADO WARNING FOR EAST CENTRAL CASS AND NORTHERN ST. JOSEPH
COUNTIES IN SOUTHWEST MICHIGAN EXPIRES AT 1015 PM EDT...

AT 1003 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAD MOVED 
OUT OF THE AREA. THEREFORE...THE TORNADO WARNING HAS BEEN
ALLOWED TO EXPIRE.

IF YOU HAVE SEVERE WEATHER TO REPORT...YOU CAN CALL YOUR LOCAL LAW
ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT FRIDAY MORNING
FOR NORTHERN INDIANA AND SOUTHERN MICHIGAN.

LAT...LON 4201 8576 4207 8577 4207 8531 4190 8531
      4182 8576 4198 8583
TIME...MOT...LOC 0207Z 242DEG 38KT 4213 8546

$$

JC

The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 18, 8:06 PM EDT	Severe Thunderstorm Warning	IWX	Branch	54 min
Oct 18, 8:09 PM EDT	Severe Thunderstorm Warning	IWX	Berrien	51 min
Oct 18, 8:50 PM EDT	Severe Thunderstorm Warning	IWX	Berrien, Cass	40 min
Oct 18, 8:58 PM EDT	Tornado Warning	IWX	Berrien, Cass	47 min
Oct 18, 10:45 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Saint Joseph	60 min
Oct 18, 11:05 PM EDT	Tornado Warning	IWX	Branch, Saint Joseph	40 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.