Alert archive / Wisconsin / Special Weather Statements in 2017
Special Weather Statement, NWS Milwaukee, WI
NWS Milwaukee, WI issued this special weather statement at Jul 21, 2017, 12:42 PM CDT for Iowa County, Lafayette County, Wisconsin. It was in force for 63 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 21, 2017, 12:42 PM CDT (17:42 UTC)
- Expired
- Jul 21, 2017, 1:45 PM CDT
- In force
- 63 min
- Issued by
- NWS Milwaukee, WI
Counties Iowa County, WI, Lafayette County, WI
The radar
The Milwaukee radar (KMKX), 135 km from the middle of the area, began a volume at 17:45 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
Davenport, (KDVN), launched 12:00Z, 5.7 hours before the alert went out and 134 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.
- Mixed-layer CAPE
- 81 J/kg
- Mixed-layer CIN
- -302 J/kg
- Mixed-layer LCL
- 1173 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 125 m²/s²
- 0-3 km storm-relative helicity
- 192 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>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 Milwaukee, WI wrote its last area forecast discussion before this special weather statement went out at Jul 21, 12:20 PM CDT, 22 minutes earlier.
Area forecast discussion, Jul 21, 12:20 PM CDT, 22 minutes before
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</html>Hazardous weather outlook, Jul 21, 4:10 AM CDT, 8 hours 32 minutes before
Hazardous Weather Outlook National Weather Service Milwaukee/Sullivan WI 410 AM CDT Fri Jul 21 2017 WIZ046-047-051-052-056>060-062>072-220915- Marquette-Green Lake-Fond Du Lac-Sheboygan-Sauk-Columbia-Dodge- Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee- Lafayette-Green-Rock-Walworth-Racine-Kenosha- 410 AM CDT Fri Jul 21 2017 This Hazardous Weather Outlook is for portions of east central Wisconsin, south central Wisconsin, and southeast Wisconsin. .DAY ONE...Today and Tonight Several rounds of thunderstorms are expected from this afternoon through the overnight hours. Repeated rounds of storms over the same area will produce heavy rain that would affect the already high rivers. A flash flood watch is in effect for all but east central WI. Damaging winds, large hail and even a tornado are possible. Heat index values in the middle to upper 90s are forecast across mainly southern and western portions of the area this afternoon. .DAYS TWO THROUGH SEVEN...Saturday through Thursday There is a chance of thunderstorms Saturday and Sunday, and again Wednesday night through Thursday. Heat index values in the middle 90s are forecast across mainly southern portions of the area Saturday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon and tonight. LMZ643>646-220915- Sheboygan to Port Washington WI- Port Washington to North Point Light WI- North Point Light to Wind Point WI- Wind Point WI to Winthrop Harbor IL- 410 AM CDT Fri Jul 21 2017 This Hazardous Weather Outlook is for portions of Lake Michigan. .DAY ONE...Today and Tonight Thunderstorms will develop this afternoon and overspread all of southern Wisconsin tonight before tapering off Saturday morning. Gusty winds and hail are possible at times. There is a slight risk for severe storms during this period. .DAYS TWO THROUGH SEVEN...Saturday through Thursday There is a chance of thunderstorms Saturday and Sunday, and again Wednesday night through Thursday. Cronce www.weather.gov/mkx
In the hours before
Special weather statement, Jul 21, 12:42 PM CDT, 0 minutes before
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</html>The office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 9:29 AM CDT | River Flood Warning | MKX | Sauk | 5 days |
| Jul 21, 2:03 PM CDT | Special Weather Statement | MKX | Green, Rock | 72 min |
| Jul 21, 5:04 PM CDT | Special Weather Statement | MKX | Lafayette | 71 min |
| Jul 21, 5:21 PM CDT | Special Weather Statement | MKX | Green | 24 min |
| Jul 21, 5:31 PM CDT | Special Weather Statement | MKX | Lafayette | 29 min |
| Jul 21, 5:46 PM CDT | Areal Flood Advisory | MKX | Dane | 3 hr |
| Jul 21, 5:50 PM CDT | Special Weather Statement | MKX | Rock | 25 min |
| Jul 21, 5:55 PM CDT | Special Weather Statement | MKX | Green | 20 min |
| Jul 21, 6:02 PM CDT | Special Weather Statement | MKX | Lafayette | 28 min |
| Jul 21, 6:14 PM CDT | Special Weather Statement | MKX | Rock | 31 min |
| Jul 21, 6:23 PM CDT | Special Weather Statement | MKX | Lafayette | 22 min |
| Jul 21, 6:40 PM CDT | Special Weather Statement | MKX | Rock | 35 min |
| Jul 21, 6:44 PM CDT | Special Weather Statement | MKX | Lafayette | 31 min |
Nearby
Special Weather Statements in Wisconsin, 2017Every 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.