Alert archive / Michigan / Tornado Warnings in 2017

Tornado Warning 3, NWS Detroit, MI

October 7, 2017Livingston County, Michigan

NWS Detroit, MI issued this tornado warning at Oct 7, 2017, 10:01 PM EDT for Livingston County, Michigan. It was in force for 16 min. 4 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: Oct 7, 2017, 10:01 PM EDT (02:01 UTC)
Expired: Oct 7, 2017, 10:17 PM EDT
In force: 16 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Livingston County, MI

The radar

The Detroit radar (KDTX), 39 km from the middle of the area, began a volume at 02:01 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 7, 10:05 PM EDT	TSTM WND GST 50	Howell, MI
Oct 7, 10:06 PM EDT	TSTM WND DMG	1 Nw Howell, MI	15 INCH TREE LIMBS DOWN WITH SEVERAL 3 TO 4 INCH LIMBS DOWN AT BREWER ROAD AND M-59. REPORTED 57 MPH WIND GUST WITH ANEMOMETER NEAR THIS LOCATION.
Oct 7, 10:10 PM EDT	TSTM WND DMG	1 N Howell, MI	MULTIPLE TREES DOWN ON HENDERSON ROAD NEAR BYRON ROAD.
Oct 7, 10:15 PM EDT	TSTM WND GST 54	Howell, MI

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 2.0 hours before the alert went out and 43 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: 43 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1329 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 309 m²/s²
0-3 km storm-relative helicity: 399 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

108 
WFUS53 KDTX 080201
TORDTX
MIC093-080230-
/O.NEW.KDTX.TO.W.0003.171008T0201Z-171008T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Detroit/Pontiac MI
1001 PM EDT SAT OCT 7 2017

The National Weather Service in Detroit/Pontiac has issued a

* Tornado Warning for...
  Northern Livingston County in southeastern Michigan...

* Until 1030 PM EDT
    
* At 1001 PM EDT, a severe thunderstorm capable of producing a
  tornado was located near Fowlerville, moving northeast at 45 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Howell around 1010 PM EDT. 
  Cohoctah and Oak Grove around 1015 PM EDT. 

Other locations impacted by this tornadic thunderstorm include
Howell, Hartland, Fowlerville, Oak Grove, Cohoctah, Tyrone Township
and Deerfield Township.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4253 8403 4254 8408 4264 8415 4278 8397
      4278 8369 4266 8368
TIME...MOT...LOC 0201Z 220DEG 40KT 4260 8404 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

SC

2 follow-up statements

250 
WWUS53 KDTX 080207
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
1007 PM EDT SAT OCT 7 2017

MIC093-080230-
/O.CON.KDTX.TO.W.0003.000000T0000Z-171008T0230Z/
Livingston MI-
1007 PM EDT SAT OCT 7 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT FOR
NORTHEASTERN LIVINGSTON COUNTY...
    
At 1007 PM EDT, a severe thunderstorm capable of producing a tornado 
was located over Oak Grove, or near Howell, moving northeast at 60 
mph.

HAZARD...Tornado. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This tornadic thunderstorm will remain over mainly rural areas of
northeastern Livingston County, including the following locations:
Hartland, Howell, Oak Grove, Cohoctah, Tyrone Township and Deerfield
Township.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4260 8394 4260 8399 4267 8403 4278 8397
      4278 8369 4266 8368
TIME...MOT...LOC 0207Z 231DEG 59KT 4266 8393 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

SC

912 
WWUS53 KDTX 080217
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
1017 PM EDT SAT OCT 7 2017

MIC093-080227-
/O.CAN.KDTX.TO.W.0003.000000T0000Z-171008T0230Z/
Livingston MI-
1017 PM EDT SAT OCT 7 2017

...THE TORNADO WARNING FOR NORTHEASTERN LIVINGSTON COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

LAT...LON 4260 8394 4260 8399 4267 8403 4278 8397
      4278 8369 4266 8368
TIME...MOT...LOC 0216Z 220DEG 40KT 4275 8383 

$$

SC

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 7, 8:31 PM EDT	Special Weather Statement	DTX	Midland, Saginaw	74 min
Oct 7, 8:55 PM EDT	Special Weather Statement	DTX	Lenawee, Livingston	80 min
Oct 7, 9:13 PM EDT	Special Weather Statement	DTX	Bay, Saginaw, Shiawassee	77 min
Oct 7, 9:35 PM EDT	Special Weather Statement	DTX	Shiawassee	40 min
Oct 7, 9:45 PM EDT	Special Weather Statement	DTX	Lenawee	45 min
Oct 7, 9:52 PM EDT	Severe Thunderstorm Warning	DTX	Livingston	38 min
Oct 7, 9:59 PM EDT	Special Weather Statement	DTX	Washtenaw	46 min
Oct 7, 10:06 PM EDT	Special Marine Warning	DTX		84 min
Oct 7, 10:16 PM EDT	Special Weather Statement	DTX	Washtenaw	44 min
Oct 7, 10:16 PM EDT	Severe Thunderstorm Warning	DTX	Genesee, Oakland	27 min
Oct 7, 10:22 PM EDT	Severe Thunderstorm Warning	DTX	Saginaw, Tuscola	53 min
Oct 7, 10:27 PM EDT	Severe Thunderstorm Warning	DTX	Lenawee, Monroe	27 min
Oct 7, 10:44 PM EDT	Special Marine Warning	DTX		91 min
Oct 7, 10:49 PM EDT	Special Weather Statement	DTX	Macomb, Oakland, Wayne	56 min
Oct 7, 10:49 PM EDT	Severe Thunderstorm Warning	DTX	Huron, Sanilac	56 min
Oct 7, 10:49 PM EDT	Tornado Warning	DTX	Lapeer	29 min
Oct 7, 11:05 PM EDT	Special Marine Warning	DTX		85 min
Oct 7, 11:16 PM EDT	Special Marine Warning	DTX		89 min
Oct 8, 4:00 AM EDT	Small Craft Advisory	DTX		6 hr

Nearby

Tornado Warnings in Michigan, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.