Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 49, NWS Milwaukee, WI

August 26, 2018Columbia County, Sauk County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Aug 26, 2018, 3:24 PM CDT for Columbia County, Sauk County, Wisconsin. It was in force for 36 min. 1 report 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: Aug 26, 2018, 3:24 PM CDT (20:24 UTC)
Expired: Aug 26, 2018, 4:00 PM CDT
In force: 36 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Columbia County, WI, Sauk County, WI

The radar

The Milwaukee radar (KMKX), 112 km from the middle of the area, began a volume at 20:27 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
Aug 26, 3:45 PM CDT	TSTM WND DMG	North Freedom, WI	SIX REPORTS OF TREES DOWN ON ROADS.

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

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.4 hours before the alert went out and 186 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: 80 J/kg
Mixed-layer CIN: -408 J/kg
Mixed-layer LCL: 842 m above ground
0-6 km bulk shear: 0 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 0 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

095 
WUUS53 KMKX 262024
SVRMKX
WIC021-111-262100-
/O.NEW.KMKX.SV.W.0049.180826T2024Z-180826T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Milwaukee/Sullivan WI
324 PM CDT SUN AUG 26 2018

The National Weather Service in Milwaukee/Sullivan has issued a

* Severe Thunderstorm Warning for...
  Western Columbia County in south central Wisconsin...
  Sauk County in south central Wisconsin...

* Until 400 PM CDT.

* At 324 PM CDT, severe thunderstorms were located along a line
  extending from 7 miles north of Reedsburg to near Mazomanie, moving
  northeast at 55 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Baraboo, Portage, Reedsburg, Prairie Du Sac, Sauk City, Wisconsin
  Dells, Lake Wisconsin, Lake Delton, West Baraboo, Plain, North
  Freedom, Merrimac, Rock Springs, Loganville, Leland, Interstate
  90/94 Interchange, Devils Lake St Park and Hill Point.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Damaging winds and continuous cloud to ground lightning is occurring 
with these storms. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4364 9010 4364 8945 4349 8941 4329 8968
      4329 8971 4326 8974 4324 8980 4320 8985
      4319 8990 4319 9001 4331 9014
TIME...MOT...LOC 2024Z 213DEG 48KT 4365 8997 4320 8986 

HAIL...0.75IN
WIND...60MPH
 
$$

BOXELL

1 follow-up statement

665 
WWUS53 KMKX 262044
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
344 PM CDT SUN AUG 26 2018

WIC021-111-262100-
/O.CON.KMKX.SV.W.0049.000000T0000Z-180826T2100Z/
Columbia WI-Sauk WI-
344 PM CDT SUN AUG 26 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM CDT
FOR WESTERN COLUMBIA AND EASTERN SAUK COUNTIES...

At 344 PM CDT, severe thunderstorms were located along a line
extending from Wisconsin Dells to Prairie Du Sac, moving northeast at
35 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Baraboo, Portage, Prairie Du Sac, Sauk City, Wisconsin Dells, Lake
Wisconsin, Lake Delton, West Baraboo, North Freedom, Merrimac,
Interstate 90/94 Interchange and Devils Lake St Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4364 8990 4364 8945 4349 8941 4329 8968
      4329 8971 4326 8974 4324 8980 4322 8982
TIME...MOT...LOC 2044Z 237DEG 31KT 4361 8980 4330 8972 

HAIL...0.75IN
WIND...60MPH
 
$$

BOXELL

The office that day

Everything else NWS Milwaukee, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 26, 2:37 AM CDT	Dense Fog Advisory	MKX	Columbia, Dane, Dodge, Green, Green Lake, Iowa and 8 more	6 hr
Aug 26, 11:53 AM CDT	Marine Dense Fog Advisory	MKX		7 hr
Aug 26, 3:57 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Green Lake, Marquette, Sauk	48 min
Aug 26, 4:11 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane	49 min
Aug 26, 4:17 PM CDT	Severe Thunderstorm Warning	MKX	Green Lake, Marquette	43 min
Aug 26, 4:41 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dodge, Fond du Lac, Green Lake	49 min
Aug 26, 4:59 PM CDT	Special Weather Statement	MKX	Dodge	46 min
Aug 26, 5:13 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Dodge, Jefferson	27 min
Aug 26, 5:38 PM CDT	Special Weather Statement	MKX	Dodge, Fond du Lac, Ozaukee	52 min
Aug 26, 6:10 PM CDT	Tornado Warning	MKX	Ozaukee, Washington	18 min
Aug 26, 6:41 PM CDT	Special Marine Warning	MKX		49 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2018 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.