Alert archive / Michigan / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 21, NWS Gaylord, MI

July 6, 20174 counties in Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Jul 6, 2017, 5:19 PM EDT for 4 counties in Michigan. It was in force for 56 min. 5 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: Jul 6, 2017, 5:19 PM EDT (21:19 UTC)
Expired: Jul 6, 2017, 6:15 PM EDT
In force: 56 min
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Crawford County, MI, Kalkaska County, MI, Missaukee County, MI, Roscommon County, MI

The radar

The NCL Michigan radar (KAPX), 41 km from the middle of the area, began a volume at 21:18 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
Jul 6, 5:45 PM EDT	TSTM WND DMG	3 Wsw Grayling, MI	REPORTED TREES ON POWER LINES. TIME ESTIMATED.
Jul 6, 5:50 PM EDT	TSTM WND DMG	2 Sw South Higgins Lake, MI	REPORTS OF POWER LINES DOWN. TIME ESTIMATED.
Jul 6, 5:51 PM EDT	TSTM WND DMG	2 E North Higgins Lake, MI	REPORTS OF POWER LINES DOWN.
Jul 6, 5:51 PM EDT	TSTM WND DMG	2 Se Higgins Lake, MI	SEVERAL TREES AND LIMBS DOWN ALONG THE SOUTHWEST SIDE OF HIGGINS LAKE.
Jul 6, 5:59 PM EDT	TSTM WND DMG	1 Nw Roscommon, MI	TREE DOWN IN 200 BLOCK OF SHIRLEY LANE. TIME ESTIMATED.

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, 9.3 hours before the alert went out and 199 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: 365 J/kg
Mixed-layer CIN: -170 J/kg
Mixed-layer LCL: 1233 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

030 
WUUS53 KAPX 062119
SVRAPX
MIC039-079-113-143-062215-
/O.NEW.KAPX.SV.W.0021.170706T2119Z-170706T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Gaylord MI
519 PM EDT THU JUL 6 2017

The National Weather Service in Gaylord has issued a

* Severe Thunderstorm Warning for...
  Crawford County in northern Michigan...
  Southeastern Kalkaska County in northern Michigan...
  Northern Roscommon County in northern Michigan...
  Northeastern Missaukee County in northern Michigan...

* Until 615 PM EDT

* At 518 PM EDT, a severe thunderstorm was located near Sigma, or 12
  miles west of Grayling, moving southeast at 35 mph.

  HAZARD...60 mph wind gusts and half dollar size hail. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Grayling, Roscommon, St. Helen, Sharon, South Branch Township,
  Higgins Lake, Moorestown, North Higgins Lake, Lake St. Helen, South
  Higgins Lake and Smithville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4450 8521 4477 8493 4468 8437 4428 8437
TIME...MOT...LOC 2118Z 303DEG 32KT 4464 8496 

HAIL...1.25IN
WIND...60MPH
 
$$

msb

2 follow-up statements

695 
WWUS53 KAPX 062145
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
545 PM EDT THU JUL 6 2017

MIC079-062154-
/O.CAN.KAPX.SV.W.0021.000000T0000Z-170706T2215Z/
Kalkaska MI-
545 PM EDT THU JUL 6 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN KALKASKA COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4446 8505 4451 8498 4451 8485 4462 8485
      4474 8470 4468 8437 4428 8437
TIME...MOT...LOC 2144Z 289DEG 24KT 4458 8473 

$$

MIC039-113-143-062215-
/O.CON.KAPX.SV.W.0021.000000T0000Z-170706T2215Z/
Crawford MI-Roscommon MI-Missaukee MI-
545 PM EDT THU JUL 6 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR SOUTHERN CRAWFORD...NORTHERN ROSCOMMON AND NORTHEASTERN MISSAUKEE
COUNTIES...

At 544 PM EDT, a severe thunderstorm was located near Grayling,
moving east at 25 mph.

HAZARD...60 mph wind gusts and half dollar size hail. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Grayling, Roscommon, St. Helen, South Branch Township, Higgins Lake,
Moorestown, North Higgins Lake, Lake St. Helen and South Higgins
Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4446 8505 4451 8498 4451 8485 4462 8485
      4474 8470 4468 8437 4428 8437
TIME...MOT...LOC 2144Z 289DEG 24KT 4458 8473 

HAIL...1.25IN
WIND...60MPH
 
$$

msb

882 
WWUS53 KAPX 062206
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
606 PM EDT THU JUL 6 2017

MIC113-062216-
/O.CAN.KAPX.SV.W.0021.000000T0000Z-170706T2215Z/
Missaukee MI-
606 PM EDT THU JUL 6 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MISSAUKEE COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. **! Therefore, the warning has been cancelled.

LAT...LON 4437 8471 4463 8437 4428 8437
TIME...MOT...LOC 2206Z 303DEG 32KT 4447 8450 

$$

MIC039-143-062215-
/O.CON.KAPX.SV.W.0021.000000T0000Z-170706T2215Z/
Crawford MI-Roscommon MI-
606 PM EDT THU JUL 6 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR SOUTHEASTERN CRAWFORD AND NORTHEASTERN ROSCOMMON COUNTIES...

At 606 PM EDT, a severe thunderstorm was located near Roscommon,
moving southeast at 35 mph.

HAZARD...60 mph wind gusts and half dollar size hail. 

SOURCE...Radar indicated. 

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

Locations impacted include...
St. Helen, Lake St. Helen and South Branch Township. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4437 8471 4463 8437 4428 8437
TIME...MOT...LOC 2206Z 303DEG 32KT 4447 8450 

HAIL...1.25IN
WIND...60MPH
 
$$

msb

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 1:01 PM EDT	Special Weather Statement	APX	Chippewa	59 min
Jul 6, 1:04 PM EDT	Special Marine Warning	APX		56 min
Jul 6, 2:50 PM EDT	Special Weather Statement	APX	Oscoda	25 min
Jul 6, 2:58 PM EDT	Special Marine Warning	APX		47 min
Jul 6, 3:04 PM EDT	Special Weather Statement	APX	Presque Isle	26 min
Jul 6, 3:43 PM EDT	Special Marine Warning	APX		62 min
Jul 6, 5:31 PM EDT	Severe Thunderstorm Warning	APX	Ogemaw	30 min
Jul 6, 6:12 PM EDT	Severe Thunderstorm Warning	APX	Ogemaw	63 min
Jul 6, 6:51 PM EDT	Severe Thunderstorm Warning	APX	Alcona, Arenac, Iosco, Ogemaw	54 min
Jul 6, 7:02 PM EDT	Special Marine Warning	APX		88 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2017 Every severe thunderstorm warning 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.