Alert archive / Michigan / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 11, NWS Detroit, MI

May 19, 2019Saginaw County, Shiawassee County, Michigan

NWS Detroit, MI issued this severe thunderstorm warning at May 19, 2019, 6:41 PM EDT for Saginaw County, Shiawassee County, Michigan. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 19, 2019, 6:41 PM EDT (22:41 UTC)
Expired: May 19, 2019, 7:13 PM EDT
In force: 32 min
Issued by: NWS Detroit, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Saginaw County, MI, Shiawassee County, MI

The radar

The Detroit radar (KDTX), 71 km from the middle of the area, began a volume at 22:45 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 12:00Z, 10.7 hours before the alert went out and 72 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: 155 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1182 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 168 m²/s²
0-3 km storm-relative helicity: 185 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Detroit, MI wrote its last area forecast discussion before this severe thunderstorm warning went out at May 19, 3:11 PM EDT, 3 hours 30 minutes earlier.

Area forecast discussion, May 19, 3:11 PM EDT, 3 hours 30 minutes before

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Hazardous weather outlook, May 19, 5:05 PM EDT, 1 hour 36 minutes before

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In the hours before

Special weather statement, May 19, 2:41 PM EDT, 4 hours before

Special Weather Statement
National Weather Service Detroit/Pontiac MI
241 PM EDT Sun May 19 2019

MIZ070-191930-
Macomb-
241 PM EDT Sun May 19 2019

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT MACOMB COUNTY...

At 241 PM EDT, radar indicated strong thunderstorms were located
along a line extending from 6 miles south of Almont to near Romeo to
near Macomb Township to Sterling Heights. Movement was northeast at
35 mph.

Winds in excess of 40 mph are possible with these storms.

These storms will be near...
  Romeo around 245 PM EDT.
  Macomb Township around 250 PM EDT.
  Mount Clemens and Armada around 255 PM EDT.
  New Baltimore, Richmond and Memphis around 305 PM EDT.

Other locations impacted by these storms include New Haven, Shelby
Township, Ray Center, Chesterfield Township, Clinton Township,
Fraser, Utica, Washington and Roseville.

LAT...LON 4248 8301 4289 8310 4290 8274 4271 8273
      4269 8271 4266 8271
TIME...MOT...LOC 1841Z 243DEG 31KT 4283 8306 4277 8301 4264 8300 4255
8304

AM

Special weather statement, May 19, 2:45 PM EDT, 3 hours 56 minutes before

Special Weather Statement
National Weather Service Detroit/Pontiac MI
245 PM EDT Sun May 19 2019

MIZ063-070-191930-
Macomb MI-St. Clair MI-
245 PM EDT Sun May 19 2019

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MACOMB AND EASTERN ST.
CLAIR COUNTIES UNTIL 330 PM EDT...

At 245 PM EDT, Doppler radar indicated a strong thunderstorm over
Macomb Township, or 7 miles north of Mount Clemens, moving east at 50
mph.

Wind gusts of 50 to 55 mph will be possible with this storm.

This strong thunderstorm will be near...
  New Baltimore and Richmond around 300 PM EDT.
  Marine City around 310 PM EDT.
  St. Clair around 315 PM EDT.
  Marysville around 320 PM EDT.

Other locations impacted by this storm include Anchorville, Adair,
Shelby Township, Rattle Run, Ray Center, Smiths Creek, Washington,
Fair Haven, Wadhams and Fort Gratiot.

LAT...LON 4298 8238 4293 8246 4281 8248 4276 8247
      4267 8251 4263 8251 4255 8259 4256 8264
      4252 8269 4254 8276 4254 8278 4259 8300
      4276 8307 4308 8248
TIME...MOT...LOC 1845Z 253DEG 42KT 4270 8294

SC

Local storm report, May 19, 3:03 PM EDT, 3 hours 38 minutes before

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Local storm report, May 19, 4:18 PM EDT, 2 hours 23 minutes before

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Local storm report, May 19, 4:45 PM EDT, 1 hour 56 minutes before

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Special weather statement, May 19, 6:35 PM EDT, 6 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 9:46 PM EDT	Lakeshore Flood Advisory	DTX	Macomb, Saint Clair	30 hr
May 18, 9:47 PM EDT	Small Craft Advisory	DTX		24 hr
May 19, 1:21 PM EDT	Special Weather Statement	DTX	Shiawassee	54 min
May 19, 1:32 PM EDT	Special Weather Statement	DTX	Livingston	58 min
May 19, 1:37 PM EDT	Special Weather Statement	DTX	Wayne	38 min
May 19, 2:07 PM EDT	Special Weather Statement	DTX	Oakland	38 min
May 19, 2:29 PM EDT	Severe Thunderstorm Warning	DTX	Lapeer, Tuscola	17 min
May 19, 2:32 PM EDT	Special Weather Statement	DTX	Wayne	43 min
May 19, 2:36 PM EDT	Severe Thunderstorm Warning	DTX	Sanilac	35 min
May 19, 2:41 PM EDT	Special Weather Statement	DTX	Macomb	49 min
May 19, 2:45 PM EDT	Special Weather Statement	DTX	Macomb, Saint Clair	45 min
May 19, 2:52 PM EDT	Special Marine Warning	DTX		53 min
May 19, 2:54 PM EDT	Tornado Warning	DTX	Macomb	15 min
May 19, 3:00 PM EDT	Tornado Warning	DTX	Saint Clair	33 min
May 19, 6:35 PM EDT	Special Weather Statement	DTX	Genesee, Saginaw, Shiawassee	70 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2019 Every severe thunderstorm warning in 2019

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.