Alert archive / Michigan / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 21, NWS Gaylord, MI

July 25, 2012Missaukee County, Wexford County, Michigan

NWS Gaylord, MI issued this severe thunderstorm warning at Jul 25, 2012, 8:40 PM EDT for Missaukee County, Wexford County, Michigan. It was in force for 65 min. 6 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 25, 2012, 8:40 PM EDT (00:40 UTC)
Expired: Jul 25, 2012, 9:45 PM EDT
In force: 65 min
Issued by: NWS Gaylord, MI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Missaukee County, MI, Wexford County, MI

The radar

The NCL Michigan radar (KAPX), 75 km from the middle of the area, began a volume at 00:41 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 25, 8:50 PM EDT	TSTM WND DMG	3 Nw Manton, MI	TREES AND BRANCHES DOWN.
Jul 25, 8:54 PM EDT	HAIL 1	4 Nw Manton, MI
Jul 25, 8:55 PM EDT	HAIL 2	Manton, MI
Jul 25, 9:01 PM EDT	HAIL 1	Manton, MI
Jul 25, 9:03 PM EDT	HAIL 1.25	3 S Manton, MI
Jul 25, 9:03 PM EDT	HAIL 1.25	Manton, MI

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 25, 7:38 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.7 hours before the alert went out and 220 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: 2643 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1451 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 212 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 16.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

035 
WUUS53 KAPX 260040
SVRAPX
MIC113-165-260145-
/O.NEW.KAPX.SV.W.0021.120726T0040Z-120726T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GAYLORD MI
840 PM EDT WED JUL 25 2012

THE NATIONAL WEATHER SERVICE IN GAYLORD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MISSAUKEE COUNTY IN NORTHERN LOWER MICHIGAN...
  NORTHEASTERN WEXFORD COUNTY IN NORTHERN LOWER MICHIGAN...

* UNTIL 945 PM EDT

* AT 836 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR BUCKLEY...OR 17 MILES
  NORTHWEST OF CADILLAC...AND MOVING EAST AT 45 MPH. PENNY SIZE HAIL
  MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  LAKE CITY...MEAUWATAKA...MANTON...JENNINGS...MOREY...MOORESTOWN...
  STITTSVILLE AND MERRITT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4436 8565 4451 8563 4451 8486 4421 8486
TIME...MOT...LOC 0040Z 280DEG 43KT 4445 8553
WIND...HAIL 60MPH 0.75IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 8:22 PM EDT	Special Marine Warning	APX		83 min
Jul 25, 8:57 PM EDT	Severe Thunderstorm Warning	APX	Manistee, Missaukee, Wexford	60 min
Jul 25, 8:59 PM EDT	Tornado Warning	APX	Missaukee, Wexford	34 min
Jul 25, 9:58 PM EDT	Severe Thunderstorm Warning	APX	Gladwin	44 min
Jul 25, 10:22 PM EDT	Flash Flood Warning	APX	Missaukee, Wexford	3 hr
Jul 25, 10:34 PM EDT	Severe Thunderstorm Warning	APX	Arenac	29 min
Jul 25, 10:46 PM EDT	Flash Flood Warning	APX	Manistee	3 hr
Jul 25, 11:16 PM EDT	Flash Flood Warning	APX	Gladwin	3 hr

Nearby

Severe Thunderstorm Warnings in Michigan, 2012 Every severe thunderstorm warning in 2012

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.