Alert archive / Wisconsin / Special Weather Statements in 2017

Special Weather Statement, NWS La Crosse, WI

August 1, 20175 counties in Wisconsin; Dodge County, Olmsted County, Wabasha County, Minnesota

NWS La Crosse, WI issued this special weather statement at Aug 1, 2017, 4:44 PM CDT for 5 counties in Wisconsin; Dodge County, Olmsted County, Wabasha County, Minnesota. It was in force for 76 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: Aug 1, 2017, 4:44 PM CDT (21:44 UTC)
Expired: Aug 1, 2017, 6:00 PM CDT
In force: 76 min
Issued by: NWS La Crosse, WI

Counties Dodge County, MN, Olmsted County, MN, Wabasha County, MN, Buffalo County, WI, Clark County, WI, Jackson County, WI, Taylor County, WI, Trempealeau County, WI

The radar

The La Crosse radar (KARX), 97 km from the middle of the area, began a volume at 21:45 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

Minneapolis, MN (KMPX), launched 12:00Z, 9.7 hours before the alert went out and 178 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: 13 J/kg
Mixed-layer CIN: -271 J/kg
Mixed-layer LCL: 1331 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS La Crosse, WI wrote its last area forecast discussion before this special weather statement went out at Aug 1, 2:58 PM CDT, 1 hour 46 minutes earlier.

Area forecast discussion, Aug 1, 2:58 PM CDT, 1 hour 46 minutes before

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</head>
<body>
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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Hazardous weather outlook, Aug 1, 4:34 AM CDT, 12 hours 10 minutes before

Hazardous Weather Outlook
National Weather Service La Crosse WI
434 AM CDT Tue Aug 1 2017

IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-021100-
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-
Clayton-Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Houston-
Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse-Monroe-Juneau-
Adams-Vernon-Crawford-Richland-Grant-
434 AM CDT Tue Aug 1 2017

This Hazardous Weather Outlook is for portions of southeast
Minnesota...northeast Iowa and southwest into central Wisconsin.

.DAY ONE...Today and Tonight

Scattered thunderstorms are expected later this afternoon into
tonight. However, these storms are expected to remain below severe
limits.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

There is a chance of a few thunderstorms again Wednesday. These
storms are also expected to remain below severe limits.

Scattered thunderstorms are likely again on Thursday. A few storms
could be strong south of I-90. Gusty winds and hail would be the
main threats.

Isolated thunderstorms may occur mainly during the afternoon
hours on Friday, Saturday and Sunday. These storms are expected to
remain below severe limits.

.SPOTTER INFORMATION STATEMENT...

No action needed.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

DAS

In the hours before

Special weather statement, Aug 1, 4:44 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service La Crosse WI
444 PM CDT TUE AUG 1 2017

MNZ079-086>088-WIZ017-029-032>034-012300-
Wabasha-Olmsted-Dodge-Winona-Buffalo-Jackson-Taylor-Trempealeau-
Clark-
444 PM CDT TUE AUG 1 2017

...A LINE OF SCATTERED THUNDERSTORMS WILL AFFECT NORTHWESTERN
WINONA...OLMSTED...WABASHA...DODGE...BUFFALO...CLARK...NORTHERN
JACKSON...TAYLOR AND TREMPEALEAU COUNTIES...

At 441 PM CDT, radar indicated scattered showers and thunderstorms
located along a line extending from 6 miles northwest of Westboro,
Wisconsin to West Concord, Minnesota. Movement was southeast at 30
mph.

Winds in excess of 30 mph and half inch hail are possible with these
storms.

Locations impacted include...
Rochester, Medford, Black River Falls, Arcadia, Mondovi, Dodge
Center, Wabasha, Neillsville, Whitehall, Mantorville, Kasson, Byron,
Plainview, Abbotsford, and Osseo.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4512 9004 4512 9020 4503 9020 4503 9031
      4442 9032 4385 9305 4420 9305 4419 9255
      4437 9255 4437 9243 4445 9243 4441 9208
      4460 9200 4460 9092 4538 9092 4538 9004
TIME...MOT...LOC 2141Z 315DEG 25KT 4542 9040 4415 9289

DTJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 6:02 PM CDT	Special Weather Statement	ARX	Trempealeau	43 min
Aug 1, 6:08 PM CDT	Special Weather Statement	ARX	Buffalo	37 min
Aug 1, 6:21 PM CDT	Special Weather Statement	ARX	Mower	39 min

Nearby

Special Weather Statements in Wisconsin, 2017 Special Weather Statements in Minnesota, 2017 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.