Alert archive / Michigan / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Gaylord, MI

July 13, 2018Arenac County, Iosco County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Jul 13, 2018, 11:04 PM EDT for Arenac County, Iosco County, Michigan. It was in force for 26 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 13, 2018, 11:04 PM EDT (03:04 UTC)
Expired
Jul 13, 2018, 11:30 PM EDT
In force
26 min
Issued by
NWS Gaylord, MI
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Arenac County, MI, Iosco County, MI

The radar

The NCL Michigan radar (KAPX), 116 km from the middle of the area, began a volume at 03:04 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 00:00Z, 3.1 hours before the alert went out and 129 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-pSkew-T log-p diagram, Alpena, MI at 00:00Z on 2018-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 273 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Alpena, MI at 00:00Z on 2018-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
273 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
1062 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.5

Open this sounding in Storm Lab

The text

As transmitted.

622 
WUUS53 KAPX 140304
SVRAPX
MIC011-069-140330-
/O.NEW.KAPX.SV.W.0021.180714T0304Z-180714T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Gaylord MI
1104 PM EDT FRI JUL 13 2018

The National Weather Service in Gaylord has issued a

* Severe Thunderstorm Warning for...
  Northeastern Arenac County in northern Michigan...
  Southern Iosco County in northern Michigan...

* Until 1130 PM EDT.

* At 1103 PM EDT, a severe thunderstorm was located over Whittemore,
  or 13 miles west of Tawas City, moving east at 50 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Oscoda, East Tawas, Tawas City, Au Sable, Maple Ridge, Whittemore,
  Twining, Turner, Plainfield Township, National City and Wilber.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4433 8334 4433 8337 4429 8342 4425 8344
      4428 8346 4428 8350 4425 8354 4408 8359
      4407 8397 4416 8395 4417 8388 4437 8388
      4442 8333
TIME...MOT...LOC 0303Z 265DEG 42KT 4427 8379 

HAIL...<.75IN
WIND...60MPH
 
$$

SMD
2 follow-up statements
663 
WWUS53 KAPX 140315
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
1115 PM EDT FRI JUL 13 2018

MIC011-069-140330-
/O.CON.KAPX.SV.W.0021.000000T0000Z-180714T0330Z/
Arenac MI-Iosco MI-
1115 PM EDT FRI JUL 13 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT
FOR NORTHEASTERN ARENAC AND SOUTHERN IOSCO COUNTIES...

At 1115 PM EDT, a severe thunderstorm was located near Tawas City,
moving east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Oscoda, East Tawas, Tawas City, Au Sable, Whittemore, Twining,
Turner, Plainfield Township, National City and Wilber.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4433 8334 4433 8337 4429 8342 4425 8344
      4428 8346 4428 8350 4425 8354 4408 8359
      4407 8390 4412 8386 4416 8385 4437 8372
      4442 8333
TIME...MOT...LOC 0315Z 271DEG 40KT 4425 8359 

HAIL...<.75IN
WIND...60MPH
 
$$

GILLEN
789 
WWUS53 KAPX 140330
SVSAPX

Severe Weather Statement
National Weather Service Gaylord MI
1130 PM EDT FRI JUL 13 2018

MIC011-069-140340-
/O.EXP.KAPX.SV.W.0021.000000T0000Z-180714T0330Z/
Arenac MI-Iosco MI-
1130 PM EDT FRI JUL 13 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ARENAC AND
SOUTHERN IOSCO COUNTIES HAS EXPIRED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been allowed to expire.

LAT...LON 4433 8334 4433 8337 4429 8342 4425 8344
      4428 8346 4428 8350 4425 8354 4408 8359
      4407 8390 4412 8386 4416 8385 4437 8372
      4442 8333
TIME...MOT...LOC 0330Z 265DEG 42KT 4426 8338 

$$

GILLEN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 9:38 PM EDTSpecial Weather StatementAPXMissaukee37 min
Jul 13, 11:06 PM EDTSpecial Marine WarningAPX39 min

Nearby

Severe Thunderstorm Warnings in Michigan, 2018Every severe thunderstorm warning 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.