Alert archive / Wisconsin / Special Weather Statements in 2015

Special Weather Statement, NWS La Crosse, WI

July 18, 2015Grant County, Wisconsin

NWS La Crosse, WI issued this special weather statement at Jul 18, 2015, 10:38 AM CDT for Grant County, Wisconsin. It was in force for 37 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 18, 2015, 10:38 AM CDT (15:38 UTC)
Expired: Jul 18, 2015, 11:15 AM CDT
In force: 37 min
Issued by: NWS La Crosse, WI

County Grant County, WI

The radar

The Quad Cities radar (KDVN), 120 km from the middle of the area, began a volume at 15:39 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

Davenport, (KDVN), launched 12:00Z, 3.6 hours before the alert went out and 120 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: 2984 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 858 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

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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 18, 6:47 AM CDT, 3 hours 51 minutes earlier.

Area forecast discussion, Jul 18, 6:47 AM CDT, 3 hours 51 minutes before

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Hazardous weather outlook, Jul 18, 5:30 AM CDT, 5 hours 8 minutes before

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In the hours before

Local storm report, Jul 18, 5:05 AM CDT, 5 hours 33 minutes before

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Local storm report, Jul 18, 5:13 AM CDT, 5 hours 25 minutes before

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Local storm report, Jul 18, 5:36 AM CDT, 5 hours 2 minutes before

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Local storm report, Jul 18, 7:50 AM CDT, 2 hours 48 minutes before

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Local storm report, Jul 18, 9:03 AM CDT, 1 hour 35 minutes before

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Special weather statement, Jul 18, 10:38 AM 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 18, 1:23 AM CDT	Severe Thunderstorm Warning	ARX	Buffalo	67 min
Jul 18, 1:36 AM CDT	Special Weather Statement	ARX	Trempealeau	84 min
Jul 18, 2:06 AM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Trempealeau	54 min
Jul 18, 2:24 AM CDT	Special Weather Statement	ARX	Clark, Jackson, La Crosse, Monroe, Taylor	66 min
Jul 18, 2:32 AM CDT	Severe Thunderstorm Warning	ARX	Clark, Taylor	73 min
Jul 18, 2:43 AM CDT	Severe Thunderstorm Warning	ARX	Jackson, La Crosse, Monroe, Trempealeau	77 min
Jul 18, 3:09 AM CDT	Special Weather Statement	ARX	Vernon	66 min
Jul 18, 3:21 AM CDT	Special Weather Statement	ARX	Adams, Juneau	114 min
Jul 18, 3:36 AM CDT	Areal Flood Advisory	ARX	La Crosse	114 min
Jul 18, 3:37 AM CDT	Severe Thunderstorm Warning	ARX	Adams, Juneau	68 min
Jul 18, 4:02 AM CDT	Special Weather Statement	ARX	Crawford, Grant, Richland	73 min
Jul 18, 11:26 AM CDT	Special Weather Statement	ARX	Grant	49 min
Jul 18, 12:03 PM CDT	Tornado Warning	ARX	Grant	27 min
Jul 18, 12:31 PM CDT	Tornado Warning	ARX	Grant	44 min
Jul 18, 1:14 PM CDT	Tornado Warning	ARX	Grant	16 min
Jul 18, 2:14 AM CDT	Special Weather Statement	ARX	Mitchell	61 min
Jul 18, 2:57 AM CDT	Severe Thunderstorm Warning	ARX	Howard, Mitchell	27 min
Jul 18, 12:45 AM CDT	Special Weather Statement	ARX	Dodge, Olmsted, Wabasha	2 hr
Jul 18, 1:08 AM CDT	Severe Thunderstorm Warning	ARX	Dodge	52 min
Jul 18, 1:57 AM CDT	Tornado Warning	ARX	Wabasha	22 min
Jul 18, 2:31 AM CDT	Areal Flood Advisory	ARX	Mower	119 min

Nearby

Special Weather Statements in Wisconsin, 2015 Every special weather statement in 2015

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.