Alert archive / Michigan / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 4, NWS Gaylord, MI

June 12, 2021Montmorency County, Oscoda County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Jun 12, 2021, 6:21 PM EDT for Montmorency County, Oscoda County, Michigan. It was in force for 40 min. 2 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: Jun 12, 2021, 6:21 PM EDT (22:21 UTC)
Expired: Jun 12, 2021, 7:01 PM EDT
In force: 40 min
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Montmorency County, MI, Oscoda County, MI

The radar

The NCL Michigan radar (KAPX), 47 km from the middle of the area, began a volume at 22:22 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
Jun 12, 6:29 PM EDT	HAIL 1	1 Wsw Atlanta, MI
Jun 12, 6:36 PM EDT	HAIL 1	Atlanta, MI

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

The nearest sounding before it

Alpena, MI (KAPX), launched 12:00Z, 10.4 hours before the alert went out and 136 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 725 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -48 m²/s²
0-3 km storm-relative helicity: -21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

417 
WUUS53 KAPX 122221
SVRAPX
MIC119-135-122315-
/O.NEW.KAPX.SV.W.0004.210612T2221Z-210612T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Gaylord MI
621 PM EDT Sat Jun 12 2021

The National Weather Service in Gaylord has issued a

* Severe Thunderstorm Warning for...
  Southern Montmorency County in northern Michigan...
  North central Oscoda County in northern Michigan...

* Until 715 PM EDT.

* At 621 PM EDT, a severe thunderstorm was located near Atlanta,
  moving southeast at 25 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...
  Atlanta around 630 PM EDT.
  Loud Township around 640 PM EDT.

Other locations in the path of this severe thunderstorm include
Lockwood Lake and Comins.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4472 8411 4497 8432 4505 8432 4507 8420
      4493 8388 4491 8389
TIME...MOT...LOC 2221Z 308DEG 22KT 4501 8422 

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

Cornish

3 follow-up statements

732 
WWUS53 KAPX 122234
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
634 PM EDT Sat Jun 12 2021

MIC119-135-122315-
/O.CON.KAPX.SV.W.0004.000000T0000Z-210612T2315Z/
Montmorency MI-Oscoda MI-
634 PM EDT Sat Jun 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR SOUTHERN MONTMORENCY AND NORTH CENTRAL OSCODA COUNTIES...

At 633 PM EDT, a severe thunderstorm was located over Atlanta, moving
southeast at 25 mph.

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

SOURCE...Trained weather spotters. At 6:31 PM ET, quarter sized hail 
         was reported 1 mile WSW of Atlanta. 

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

Locations impacted include...
  Loud Township, Lockwood Lake and Comins.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4473 8410 4498 8428 4502 8425 4503 8417
      4493 8388 4491 8389
TIME...MOT...LOC 2233Z 306DEG 20KT 4497 8416 

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

Cornish

330 
WWUS53 KAPX 122247
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
647 PM EDT Sat Jun 12 2021

MIC119-135-122315-
/O.CON.KAPX.SV.W.0004.000000T0000Z-210612T2315Z/
Montmorency MI-Oscoda MI-
647 PM EDT Sat Jun 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR SOUTHEASTERN MONTMORENCY AND NORTH CENTRAL OSCODA COUNTIES...

At 647 PM EDT, a severe thunderstorm was located over Loud Township,
or 7 miles southeast of Atlanta, moving southeast at 25 mph.

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

SOURCE...Trained weather spotters.

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

Locations impacted include...
Comins, Lockwood Lake and Loud Township. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4476 8406 4493 8417 4497 8412 4499 8405
      4493 8388 4491 8389
TIME...MOT...LOC 2247Z 308DEG 22KT 4492 8406 

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

Cornish

907 
WWUS53 KAPX 122301
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
701 PM EDT Sat Jun 12 2021

MIC119-135-122310-
/O.CAN.KAPX.SV.W.0004.000000T0000Z-210612T2315Z/
Montmorency MI-Oscoda MI-
701 PM EDT Sat Jun 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MONTMORENCY AND
NORTH CENTRAL OSCODA COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds and 
small hail are still possible with this thunderstorm.

LAT...LON 4476 8406 4493 8417 4497 8412 4499 8405
      4493 8388 4491 8389
TIME...MOT...LOC 2258Z 308DEG 22KT 4487 8397 

$$

Cornish

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 4:30 PM EDT	Special Weather Statement	APX	Ogemaw, Roscommon	45 min
Jun 12, 6:18 PM EDT	Special Weather Statement	APX	Emmet	42 min
Jun 12, 6:29 PM EDT	Severe Thunderstorm Warning	APX	Gladwin, Roscommon	48 min
Jun 12, 6:44 PM EDT	Severe Thunderstorm Warning	APX	Gladwin, Roscommon	46 min
Jun 12, 6:55 PM EDT	Severe Thunderstorm Warning	APX	Ogemaw, Roscommon	31 min
Jun 12, 7:22 PM EDT	Severe Thunderstorm Warning	APX	Gladwin	38 min
Jun 12, 7:24 PM EDT	Severe Thunderstorm Warning	APX	Alcona	51 min
Jun 12, 7:55 PM EDT	Severe Thunderstorm Warning	APX	Gladwin	24 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.