Alert archive / Wisconsin / Special Weather Statements in 2017

Special Weather Statement, NWS La Crosse, WI

May 17, 2017Clark County, Wisconsin

NWS La Crosse, WI issued this special weather statement at May 17, 2017, 1:20 PM CDT for Clark County, Wisconsin. It was in force for 25 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: May 17, 2017, 1:20 PM CDT (18:20 UTC)
Expired: May 17, 2017, 1:45 PM CDT
In force: 25 min
Issued by: NWS La Crosse, WI

County Clark County, WI

The radar

The La Crosse radar (KARX), 94 km from the middle of the area, began a volume at 18:23 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 6.3 hours before the alert went out and 197 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1435 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 81 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 May 17, 12:38 PM CDT, 42 minutes earlier.

Area forecast discussion, May 17, 12:38 PM CDT, 42 minutes before

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Hazardous weather outlook, May 17, 9:52 AM CDT, 3 hours 28 minutes before

Hazardous Weather Outlook
National Weather Service La Crosse WI
952 AM CDT Wed May 17 2017

IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-181100-
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-
952 AM CDT Wed May 17 2017

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

.DAY ONE...Rest Of Today and Tonight

Severe thunderstorms are expected this afternoon and evening,
mainly between 3 pm and 8 pm. The risks will be isolated tornadoes,
damaging winds and large hail. At this time, the tornado risk
looks to be across northeast Iowa into western and central
Wisconsin. Storms with damaging winds and large hail could occur
across the entire area. Locally heavy rain will be possible with
any storm, however, the storms should be fast moving limiting the
potential for flash flooding.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Another round of widespread rain looks to spread across the area
Friday into Saturday night, with amounts of 3/4 inch to locally
1 1/2 inches appearing likely.

Isolated thunderstorms are also possible later Friday night and
Saturday. Severe weather is not expected with any of these
storms.

.SPOTTER INFORMATION STATEMENT...

Spotter groups should be prepared for activation from mid
afternoon into the evening hours. Severe weather reports,
including heavy rainfall and ongoing flooding, are appreciated
through this evening.

.EMERGENCY MANAGEMENT COORDINATION...

A webinar has been scheduled for 1 pm.

04/DAS

In the hours before

Local storm report, May 17, 11:20 AM CDT, 2 hours before

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Special weather statement, May 17, 11:33 AM CDT, 1 hour 47 minutes before

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Local storm report, May 17, 11:35 AM CDT, 1 hour 45 minutes before

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Special weather statement, May 17, 12:09 PM CDT, 1 hour 11 minutes before

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Special weather statement, May 17, 12:54 PM CDT, 26 minutes before

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Special weather statement, May 17, 1:20 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service La Crosse WI
120 PM CDT WED MAY 17 2017

WIZ029-034-171845-
Jackson-Clark-
120 PM CDT WED MAY 17 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT CLARK AND CENTRAL
JACKSON COUNTIES...

At 119 PM CDT, radar indicated strong thunderstorms were located
along a line extending from near Humbird to Hatfield to Millston.
Movement was northeast at 65 mph.

Winds in excess of 40 mph and pea size hail are possible with these
storms.

These storms will be near...
  Neillsville around 130 PM CDT.
  Loyal and Shortville around 140 PM CDT.
  Greenwood and Spencer around 145 PM CDT.

Other locations impacted by these storms include Sherwood, Colby,
Lynn, Merrillan and Willard.

LAT...LON 4494 9031 4440 9032 4416 9071 4416 9075
      4433 9080 4442 9104 4501 9047
TIME...MOT...LOC 1819Z 206DEG 57KT 4446 9092 4442 9073 4422 9067

JSB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 7:16 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo	44 min
May 16, 7:47 PM CDT	Severe Thunderstorm Warning	ARX	Trempealeau	28 min
May 16, 8:38 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Trempealeau	52 min
May 16, 8:47 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Taylor	28 min
May 16, 8:53 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo	52 min
May 16, 9:33 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Trempealeau	72 min
May 16, 9:44 PM CDT	Flash Flood Warning	ARX	Buffalo, Trempealeau	4 hr
May 16, 9:57 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Jackson	93 min
May 16, 11:07 PM CDT	River Flood Warning	ARX	Buffalo, Trempealeau	9 days
May 17, 12:04 AM CDT	Flash Flood Warning	ARX	Buffalo, Jackson, Trempealeau	116 min
May 17, 12:08 AM CDT	Severe Thunderstorm Warning	ARX	Jackson, La Crosse, Trempealeau	37 min
May 17, 1:51 AM CDT	Areal Flood Warning	ARX	Buffalo, Jackson, Trempealeau	6 hr
May 17, 7:03 AM CDT	Areal Flood Warning	ARX	Buffalo, Jackson, Trempealeau	39 hr
May 17, 9:22 AM CDT	River Flood Warning	ARX	Jackson	4 days
May 17, 9:22 AM CDT	River Flood Warning	ARX	La Crosse, Trempealeau	5 days
May 17, 9:28 AM CDT	River Flood Warning	ARX	Buffalo, Trempealeau	66 hr
May 17, 12:09 PM CDT	Special Weather Statement	ARX	La Crosse, Trempealeau	51 min
May 17, 12:54 PM CDT	Special Weather Statement	ARX	Clark, Jackson, Trempealeau	51 min
May 17, 1:42 PM CDT	Special Weather Statement	ARX	Clark	63 min
May 17, 2:16 PM CDT	Special Weather Statement	ARX	Taylor	29 min
May 17, 2:48 PM CDT	Special Weather Statement	ARX	Adams, Juneau	27 min
May 17, 4:22 PM CDT	Severe Thunderstorm Warning	ARX	Crawford	38 min
May 17, 4:29 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo	46 min
May 17, 4:41 PM CDT	Severe Thunderstorm Warning	ARX	La Crosse, Trempealeau	49 min
May 17, 4:53 PM CDT	Severe Thunderstorm Warning	ARX	Vernon	38 min
May 17, 5:06 PM CDT	Severe Thunderstorm Warning	ARX	Crawford, Grant, Richland, Vernon	39 min
May 17, 5:09 PM CDT	Tornado Warning	ARX	La Crosse	20 min
May 17, 5:17 PM CDT	Areal Flood Advisory	ARX	La Crosse	58 min
May 17, 5:24 PM CDT	Severe Thunderstorm Warning	ARX	La Crosse, Monroe	51 min
May 17, 5:26 PM CDT	Severe Thunderstorm Warning	ARX	Jackson, La Crosse, Monroe, Trempealeau	49 min
May 17, 5:31 PM CDT	Tornado Warning	ARX	Jackson	24 min
May 17, 5:43 PM CDT	Severe Thunderstorm Warning	ARX	Richland, Vernon	33 min
May 17, 5:46 PM CDT	Tornado Warning	ARX	Richland, Vernon	17 min
May 17, 5:52 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Jackson	38 min
May 17, 5:55 PM CDT	Severe Thunderstorm Warning	ARX	Jackson, Juneau, Monroe	65 min
May 17, 6:04 PM CDT	Tornado Warning	ARX	Clark, Jackson	23 min
May 17, 6:07 PM CDT	Tornado Warning	ARX	Jackson, Juneau, Monroe	16 min
May 17, 6:26 PM CDT	Severe Thunderstorm Warning	ARX	Adams	34 min
May 17, 6:29 PM CDT	Severe Thunderstorm Warning	ARX	Clark	31 min
May 17, 6:39 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Taylor	66 min
May 17, 6:56 PM CDT	Severe Thunderstorm Warning	ARX	Adams	14 min
May 16, 10:24 PM CDT	Severe Thunderstorm Warning	ARX	Floyd, Mitchell	51 min
May 16, 10:51 PM CDT	Severe Thunderstorm Warning	ARX	Chickasaw, Howard	54 min
May 17, 11:00 AM CDT	Special Weather Statement	ARX	Chickasaw, Howard, Winneshiek	60 min
May 17, 11:33 AM CDT	Special Weather Statement	ARX	Winneshiek	57 min
May 17, 2:50 PM CDT	Special Weather Statement	ARX	Chickasaw, Fayette, Floyd, Howard, Mitchell, Winneshiek	115 min
May 17, 3:02 PM CDT	Special Weather Statement	ARX	Chickasaw, Fayette, Floyd, Howard, Mitchell, Winneshiek	103 min
May 17, 3:38 PM CDT	Severe Thunderstorm Warning	ARX	Chickasaw, Fayette, Howard, Winneshiek	52 min
May 17, 4:01 PM CDT	Severe Thunderstorm Warning	ARX	Clayton, Fayette	44 min
May 17, 5:57 PM CDT	Severe Thunderstorm Warning	ARX	Floyd	32 min
May 17, 6:11 PM CDT	Severe Thunderstorm Warning	ARX	Chickasaw	34 min
May 17, 6:16 PM CDT	Severe Thunderstorm Warning	ARX	Mitchell	44 min
May 17, 6:23 PM CDT	Severe Thunderstorm Warning	ARX	Howard	37 min
May 17, 6:41 PM CDT	Severe Thunderstorm Warning	ARX	Clayton, Fayette	64 min
May 17, 6:44 PM CDT	Severe Thunderstorm Warning	ARX	Winneshiek	46 min
May 17, 6:52 PM CDT	Severe Thunderstorm Warning	ARX	Howard	10 min
May 16, 9:10 PM CDT	Severe Thunderstorm Warning	ARX	Olmsted, Wabasha	37 min
May 16, 11:12 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore	40 min
May 16, 11:17 PM CDT	Flash Flood Warning	ARX	Olmsted, Wabasha, Winona	4 hr
May 17, 3:50 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore, Olmsted, Winona	40 min
May 17, 4:12 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore, Houston	48 min
May 17, 5:10 PM CDT	Areal Flood Advisory	ARX	Winona	50 min
May 17, 6:35 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore, Mower	40 min

Nearby

Special Weather Statements in Wisconsin, 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.