Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 14, NWS Gaylord, MI

July 5, 2021Alcona County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Jul 5, 2021, 2:43 PM EDT for Alcona County, Michigan. It was in force for 17 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 5, 2021, 2:43 PM EDT (18:43 UTC)
Expired: Jul 5, 2021, 3:00 PM EDT
In force: 17 min
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Alcona County, MI

The radar

The NCL Michigan radar (KAPX), 112 km from the middle of the area, began a volume at 18:43 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

Alpena, MI (KAPX), launched 12:00Z, 6.7 hours before the alert went out and 87 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: 1115 J/kg
Mixed-layer CIN: -139 J/kg
Mixed-layer LCL: 998 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

850 
WUUS53 KAPX 051843
SVRAPX
MIC001-051900-
/O.NEW.KAPX.SV.W.0014.210705T1843Z-210705T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Gaylord MI
243 PM EDT Mon Jul 5 2021

The National Weather Service in Gaylord has issued a

* Severe Thunderstorm Warning for...
  Southeastern Alcona County in northern Michigan...

* Until 300 PM EDT.

* At 243 PM EDT, a severe thunderstorm was located over Lincoln, or
  near Harrisville, moving east at 30 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Harrisville and Harrisville State Park around 255 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4455 8328 4461 8357 4474 8347 4474 8323
      4473 8322
TIME...MOT...LOC 1843Z 274DEG 26KT 4466 8338 

HAIL...1.00IN
WIND...60MPH
 
$$

Cornish

1 follow-up statement

672 
WWUS53 KAPX 051852
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
252 PM EDT Mon Jul 5 2021

MIC001-051900-
/O.CON.KAPX.SV.W.0014.000000T0000Z-210705T1900Z/
Alcona MI-
252 PM EDT Mon Jul 5 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR SOUTHEASTERN ALCONA COUNTY...

At 251 PM EDT, a severe thunderstorm was located over Harrisville,
moving east at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe thunderstorm will remain over mainly rural areas of
southeastern Alcona County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4455 8328 4458 8343 4462 8348 4468 8345
      4474 8333 4474 8323 4472 8322
TIME...MOT...LOC 1851Z 274DEG 26KT 4466 8329 

HAIL...1.00IN
WIND...60MPH
 
$$

Cornish

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 3:25 AM EDT	Small Craft Advisory	APX		12 hr
Jul 5, 2:30 PM EDT	Special Marine Warning	APX		60 min
Jul 5, 7:16 PM EDT	Special Weather Statement	APX	Crawford, Kalkaska, Montmorency	59 min
Jul 5, 7:58 PM EDT	Special Marine Warning	APX		104 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2021 Every severe thunderstorm warning in 2021

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.