Alert archive / Wisconsin / Special Weather Statements in 2017

Special Weather Statement, NWS La Crosse, WI

July 22, 2017La Crosse County, Wisconsin

NWS La Crosse, WI issued this special weather statement at Jul 22, 2017, 8:33 PM CDT for La Crosse County, Wisconsin. It was in force for 27 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 22, 2017, 8:33 PM CDT (01:33 UTC)
Expired: Jul 22, 2017, 9:00 PM CDT
In force: 27 min
Issued by: NWS La Crosse, WI

County La Crosse County, WI

The radar

The La Crosse radar (KARX), 17 km from the middle of the area, began a volume at 01:34 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 00:00Z, 1.6 hours before the alert went out and 264 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: 160 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 1275 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 Jul 22, 6:32 PM CDT, 2 hours 1 minute earlier.

Area forecast discussion, Jul 22, 6:32 PM CDT, 2 hours 1 minute before

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Hazardous weather outlook, Jul 22, 3:25 PM CDT, 5 hours 8 minutes before

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In the hours before

Local storm report, Jul 22, 3:15 PM CDT, 5 hours 18 minutes before

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Local storm report, Jul 22, 4:29 PM CDT, 4 hours 4 minutes before

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Special weather statement, Jul 22, 5:44 PM CDT, 2 hours 49 minutes before

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Special weather statement, Jul 22, 7:05 PM CDT, 1 hour 28 minutes before

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Special weather statement, Jul 22, 7:19 PM CDT, 1 hour 14 minutes before

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Special weather statement, Jul 22, 8:33 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 7:05 PM CDT	Special Weather Statement	ARX	Trempealeau	40 min
Jul 22, 8:44 PM CDT	Special Weather Statement	ARX	La Crosse	31 min
Jul 22, 9:02 PM CDT	Special Weather Statement	ARX	La Crosse	43 min
Jul 23, 7:59 AM CDT	Areal Flood Warning	ARX	La Crosse	12 hr
Jul 23, 9:44 AM CDT	Areal Flood Warning	ARX	Clayton, Fayette	19 hr

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.