Alert archive / Michigan / Tornado Warnings in 2018

Tornado Warning 1, NWS Detroit, MI

July 31, 2018Monroe County, Michigan

NWS Detroit, MI issued this tornado warning at Jul 31, 2018, 11:38 PM EDT for Monroe County, Michigan. It was in force for 52 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: Jul 31, 2018, 11:38 PM EDT (03:38 UTC)
Expired: Aug 1, 2018, 12:30 AM EDT
In force: 52 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Monroe County, MI

The radar

The Detroit radar (KDTX), 92 km from the middle of the area, began a volume at 03:42 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 nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 3.6 hours before the alert went out and 94 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: 82 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 897 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

180 
WFUS53 KDTX 010338
TORDTX
MIC115-010430-
/O.NEW.KDTX.TO.W.0001.180801T0338Z-180801T0430Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Detroit/Pontiac MI
1138 PM EDT TUE JUL 31 2018

The National Weather Service in Detroit/Pontiac has issued a

* Tornado Warning for...
  Central Monroe County in southeastern Michigan...

* Until 1230 AM EDT.
    
* At 1137 PM EDT, a severe thunderstorm capable of producing a
  tornado was located near Luna Pier, or near Temperance, moving
  north at 15 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...
  Monroe around 1200 AM EDT.
  Ida around 1215 AM EDT.

Other locations impacted by this tornadic thunderstorm include La
Salle.

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 4182 8348 4182 8352 4187 8357 4197 8361
      4194 8337 4188 8341
TIME...MOT...LOC 0337Z 159DEG 8KT 4184 8350 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

DG

1 follow-up statement

204 
WWUS53 KDTX 010404
SVSDTX

Severe Weather Statement
National Weather Service Detroit/Pontiac MI
1204 AM EDT WED AUG 1 2018

MIC115-010430-
/O.CON.KDTX.TO.W.0001.000000T0000Z-180801T0430Z/
Monroe MI-
1204 AM EDT WED AUG 1 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1230 AM EDT FOR CENTRAL
MONROE COUNTY...
    
At 1203 AM EDT, a severe thunderstorm capable of producing a tornado
was located near Monroe, moving north at 10 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
central Monroe County.

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 4190 8345 4190 8347 4191 8349 4196 8354
      4196 8351 4195 8341 4191 8343
TIME...MOT...LOC 0403Z 189DEG 9KT 4193 8347 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

DG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 10:03 PM EDT	Small Craft Advisory	DTX		6 hr
Jul 31, 11:54 PM EDT	Tornado Warning	DTX	Monroe	51 min
Aug 1, 12:44 AM EDT	Tornado Warning	DTX	Wayne	31 min
Aug 1, 12:45 AM EDT	Flash Flood Warning	DTX	Monroe, Wayne	2 hr
Aug 1, 12:49 AM EDT	Special Marine Warning	DTX		79 min
Aug 1, 1:05 AM EDT	Severe Thunderstorm Warning	DTX	Macomb, Wayne	40 min
Aug 1, 1:33 AM EDT	Areal Flood Advisory	DTX	Macomb, Oakland	3 hr
Aug 1, 2:57 AM EDT	Areal Flood Warning	DTX	Monroe, Wayne	6 hr
Aug 1, 5:50 PM EDT	Special Weather Statement	DTX	Midland	55 min
Aug 1, 7:02 PM EDT	Special Marine Warning	DTX		88 min
Aug 1, 7:12 PM EDT	Special Weather Statement	DTX	Saginaw	63 min
Aug 1, 7:39 PM EDT	Special Weather Statement	DTX	Tuscola	66 min

Nearby

Tornado Warnings in Michigan, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.