Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 126, NWS Milwaukee, WI

July 20, 2006Dane County, Green County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Jul 20, 2006, 6:14 AM CDT for Dane County, Green County, Wisconsin. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 20, 2006, 6:14 AM CDT (11:14 UTC)
Expired: Jul 20, 2006, 6:45 AM CDT
In force: 31 min
Issued by: NWS Milwaukee, WI
Area: Counties, with a storm outline in the text

Counties Dane County, WI, Green County, WI

The radar

The Milwaukee radar (KMKX), 79 km from the middle of the area, began a volume at 11:14 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 19, 11:10 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 11.2 hours before the alert went out and 161 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: 11 J/kg
Mixed-layer CIN: -721 J/kg
Mixed-layer LCL: 2404 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 141 m²/s²
0-3 km storm-relative helicity: 364 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Milwaukee, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 20, 2:52 AM CDT, 3 hours 22 minutes earlier.

Area forecast discussion, Jul 20, 2:52 AM CDT, 3 hours 22 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
252 AM CDT THU JUL 20 2006

.DISCUSSION...FORECAST FOCUS IS ON LINGERING CONVECTION THIS
MORNING...THEN ON RAIN CHANCES FOR THE WEEKEND.

RADAR AND SATELLITE LOOPS INDICATE A HUGE MCS OVER ALL OF THE CWA
AND STRETCHING WEST TO SOUTHEAST MINNESOTA AND NORTHEAST IOWA.
CURRENT MOVEMENT WOULD LINGER SCATTERED SHOWERS AND THUNDERSTORMS
OVER MUCH OF THE CWA AFTER 12Z...IN LINE WITH GFS QPF PATTERN. ALL
MODELS KEEP SURFACE TROUGH ACROSS SOUTHEAST HALF CWA TILL AROUND
18Z...WITH CONTINUED MOISTURE CONVERGENCE. 65-70 DEW POINTS LINGER
ACROSS CWA TILL AROUND 18Z WITH 1500-2500 CAPES. A THETA-E RIDGE
ALSO LINGERS NEAR THE ILLINOIS BORDER. I WILL GENERALLY FOLLOW GFS
SOLUTION THIS MORNING AND QPF PATTERN...AND KEEP POPS IN FORECAST
THIS MORNING INTO AFTERNOON.

FOR THIS WEEKEND...NORTHWEST FLOW DEVELOPS WITH SEVERAL SHORT
WAVES TRACKING ACROSS WISCONSIN THROUGH WEEKEND. MID AND HIGH
LEVEL LAPS RATES SHOULD BE FAIRLY STEEP WITH H500 TEMPERATURES
AROUND -14. MODELS ALSO INDICATE A POSSIBLE LF QUAD OF 90KT H300
JET. THERE SHOULD BE ENOUGH H700 MOISTURE IN COMBINATION WITH MID
AND UPPER LEVEL DYNAMICS TO GENERATE SCATTERED SHOWERS AND
ISOLATED THUNDERSTORMS OVER CWA AT TIMES THROUGH THE WEEKEND.

&&

.MKX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

Hazardous weather outlook, Jul 20, 5:09 AM CDT, 1 hour 5 minutes before

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In the hours before

Local storm report, Jul 20, 4:19 AM CDT, 1 hour 55 minutes before

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Local storm report, Jul 20, 4:35 AM CDT, 1 hour 39 minutes before

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Local storm report, Jul 20, 5:25 AM CDT, 49 minutes before

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Local storm report, Jul 20, 5:39 AM CDT, 35 minutes before

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Local storm report, Jul 20, 5:55 AM CDT, 19 minutes before

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Local storm report, Jul 20, 6:10 AM CDT, 4 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 9:20 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Jefferson	25 min
Jul 20, 1:18 AM CDT	Severe Thunderstorm Warning	MKX	Columbia	42 min
Jul 20, 1:58 AM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane, Iowa, Sauk	62 min
Jul 20, 2:19 AM CDT	Severe Thunderstorm Warning	MKX	Green, Lafayette	56 min
Jul 20, 2:25 AM CDT	Special Marine Warning	MKX		2 hr
Jul 20, 2:44 AM CDT	Severe Thunderstorm Warning	MKX	Dodge, Jefferson, Rock	61 min
Jul 20, 2:57 AM CDT	Severe Thunderstorm Warning	MKX	Dane	18 min
Jul 20, 3:02 AM CDT	Severe Thunderstorm Warning	MKX	Walworth, Waukesha	58 min
Jul 20, 3:21 AM CDT	Severe Thunderstorm Warning	MKX	Washington	39 min
Jul 20, 3:53 AM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Milwaukee, Racine	42 min
Jul 20, 4:26 AM CDT	Special Marine Warning	MKX		37 min
Jul 20, 6:37 AM CDT	Severe Thunderstorm Warning	MKX	Green, Rock	38 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2006 Every severe thunderstorm warning in 2006

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.