Alert archive / Wisconsin / Excessive Heat Warnings in 2019

Excessive Heat Warning 1, NWS Milwaukee, WI

July 19, 201920 counties in Wisconsin

NWS Milwaukee, WI issued this excessive heat warning at Jul 19, 2019, 2:57 AM CDT for 20 counties in Wisconsin. It took effect at Jul 19, 2019, 10:00 AM CDT. It was in force for 29 hr. 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 19, 2019, 2:57 AM CDT (07:57 UTC)
In effect from: Jul 19, 2019, 10:00 AM CDT
Expired: Jul 20, 2019, 3:20 PM CDT
In force: 29 hr
Issued by: NWS Milwaukee, WI

Counties Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Kenosha County, WI, Lafayette County, WI, Marquette County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine County, WI, Rock County, WI, Sauk County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI

The radar

The Milwaukee radar (KMKX), 31 km from the middle of the area, began a volume at 07:57 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.

What forecasters said that day

The local office's own words before this excessive heat 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 excessive heat warning went out at Jul 19, 2:49 AM CDT, 8 minutes earlier.

Area forecast discussion, Jul 19, 2:49 AM CDT, 8 minutes before

Area Forecast Discussion
National Weather Service Milwaukee/Sullivan WI
249 AM CDT Fri Jul 19 2019

.DISCUSSION...

Today...forecast confidence is medium.

The early morning convection is expected to dissipate rather
quickly this morning. It's a fairly decent MCV complex, so its
wake should provide some subsidence to help clear out some of the
clouds...in theory. It then looks dry through the afternoon. If
the clouds hang around too long or we get too much 3-4kft
stratocu, it will have an impact on temps. But, for now will play
it with more aggressive clearing and thus the potential for a
really hot day. Highs should climb into the lower and mid 90s with
dewpoints running about as high as possible...mid 70s to around
80. This pushes the heat index to 105 to 110...which is warning
criteria. Will therefore upgrade from an advisory to a heat
warning and run it through tonight.

Tonight...forecast confidence is medium.

We should see another round of convection develop along a boundary
north of the forecast area late this afternoon and evening, then
possibly organize/cold pool its way south with time. Just how far
south is the big question. To get into southern Wisconsin would
mean really penetrating the capping thermal ridge in place, so
wouldn't be surprised if the storms remain mostly north of
Milwaukee and Madison tonight. We will remain very warm tonight
with very sticky dewpoints lingering...thus the heat warning will
run through 12z Sat.

Saturday and Saturday night...forecast confidence is medium.

That boundary to the north will then drift south during this
period, bringing another widespread round of showers and storms,
though the intensity looks diminished. This frontal passage will
mark the arrival of a much more tolerable airmass that will
overspread the region for much of next week.

Sunday and beyond...forecast confidence is high.

Canadian high pressure settles across the Upper Midwest by Sunday.
This will bring a much cooler and drier airmass for the early part
of next week. The long range models suggest a dry stretch from
Sunday through Friday of next week with temps gradually warming
from the 70s early, to the mid 80s by the end of the week.

&&

.AVIATION(06Z TAFS)...

The morning convection is expected to dissipate by around 12-14z
this morning. Then look for VFR conditions through the remainder
of the TAF period. Winds will be southwest through the period as
well. There is a chance for more storms later tonight, but the
threat appears to be mainly limited to areas north of Milwaukee
and Madison.

&&

.MARINE...

Some fog is possible across Lake Michigan through early Saturday
as high dewpoint air pushes north across the lake. Thunderstorms
are possible this morning, then things dry out today. More storms
are possible mainly over the north half tonight...spreading south
on Saturday. Thunderstorms are expected overnight. Expect
southwest winds today, a bit breezy, but should remain below
small craft advisory levels. A cold front will sweep south across
the lake Saturday into Saturday night. This will signal the
arrival of a Canadian high pressure system, providing cooler and
drier air for much of next week.

&&

.MKX WATCHES/WARNINGS/ADVISORIES...
WI...Excessive Heat Warning from 10 AM this morning to 7 AM CDT
     Saturday for WIZ046-047-051-052-056>060-062>072.

     Heat Advisory until 10 AM CDT this morning for WIZ062-067-068.

LM...None.
&&

Today/Tonight and Aviation/Marine...Davis
Saturday through Thursday...Davis

Hazardous weather outlook, Jul 18, 9:22 PM CDT, 5 hours 35 minutes before

Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
922 PM CDT Thu Jul 18 2019

WIZ046-047-051-052-056>060-062>072-200230-
Marquette-Green Lake-Fond Du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
922 PM CDT Thu Jul 18 2019

This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.

.DAY ONE...Tonight

A Heat Advisory remains in effect for far southwest Wisconsin.
Lows will be in the middle 70s.

There are more chances for thunderstorms tonight, especially
toward central Wisconsin. There is a slight risk of severe storms
tonight. Large hail, damaging winds and heavy rainfall are the
main hazards.

.DAYS TWO THROUGH SEVEN...Friday through Thursday

A Heat Advisory is in effect for all of southern Wisconsin on
Friday for heat index values of 105 to 110 expected Friday
afternoon. Prepare for the heat, and exercise heat safety during
this time.

Heat index values in the 90s are expected most places on
Saturday, but could get over 100 for far southern Wisconsin.

There are chances for thunderstorms Friday night into Sunday. A
few strong to severe storms are possible during this period.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed tonight.

LMZ643>646-200230-
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-
922 PM CDT Thu Jul 18 2019

This Hazardous Weather Outlook is for the nearshore waters from
Sheboygan Wisconsin to Winthrop Harbor Illinois.

.DAY ONE...Tonight

There are more chances for thunderstorms tonight, especially north
of Port Washington. There is a slight risk of severe storms
tonight. Large hail and damaging winds are the main hazards.

.DAYS TWO THROUGH SEVEN...Friday through Thursday

Southwest winds will approach Small Craft Advisory levels Friday
afternoon.

There are chances for thunderstorms Friday night into Sunday. A
few strong to severe storms are possible during this period.

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-200230-
Lake Michigan Michigan City IN to St. Joseph MI 5 NM offshore to
mid-line of lake.-
Lake Michigan from Seul Choix Point to Rock Island Passage 5NM
offshore to Mid Lake-
Lake Michigan South of a line from Seul Choix Point to the
Mackinac Bridge and North of a line from Charlevoix MI to South
Fox Island 5NM offshore-
Lake Michigan from Charlevoix to Point Betsie MI 5NM Offshore to
mid lake-
Lake Michigan from Point Betsie to Manistee MI 5NM offshore to
Mid Lake-
Lake Michigan from Rock Island Passage to Sturgeon Bay WI 5NM
offshore to mid lake-
Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to
Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid
Lake-
Lake Michigan from Sheboygan to Port Washington WI 5NM offshore
to Mid Lake-
Lake Michigan from Port Washington to North Point Light WI 5NM
offshore to Mid Lake-
Lake Michigan from North Point Light to Wind Point WI 5NM
offshore to Mid Lake-
Lake Michigan from Wind Point WI to Winthrop Harbor IL 5NM
offshore to Mid Lake-
Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM
offshore to Mid Lake-
Lake Michigan from Wilmette Harbor to Michigan City in 5NM
offshore to Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid
Lake-
Lake Michigan from Whitehall to Pentwater MI 5NM offshore to Mid
Lake-
Lake Michigan from Grand Haven to Whitehall MI 5NM offshore to
Mid Lake-
Lake Michigan from Holland to Grand Haven MI 5NM offshore to Mid
Lake-
Lake Michigan from South Haven to Holland MI 5NM offshore to Mid
lake-
Lake Michigan from St Joseph to South Haven MI 5NM offshore to
Mid Lake-
922 PM CDT Thu Jul 18 2019

This Hazardous Weather Outlook is for the open waters of Lake
Michigan.

.DAY ONE...Tonight

There are chances for thunderstorms tonight, especially across
central portions of Lake Michigan.

.DAYS TWO THROUGH SEVEN...Friday through Thursday

There are chances for thunderstorms Friday night into Sunday. A
few strong to severe storms are possible during this period.

www.weather.gov/mkx

In the hours before

Local storm report, Jul 19, 1:48 AM CDT, 1 hour 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
148 AM CDT FRI JUL 19 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0128 AM     TSTM WND GST     6 WNW SPRING GREEN      43.21N 90.19W
07/19/2019  M53 MPH          SAUK               WI   ASOS

            LONE ROCK ASOS AT TRI-COUNTY REGIONAL
            AIRPORT.

&&

WOOD

Local storm report, Jul 19, 1:52 AM CDT, 1 hour 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
152 AM CDT FRI JUL 19 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0130 AM     TSTM WND DMG     1 N SPRING GREEN        43.19N 90.07W
07/19/2019                   SAUK               WI   LAW ENFORCEMENT

            A FEW TREES DOWN IN SPRING GREEN. TIME
            ESTIMATED FROM RADAR.

&&

WOOD

Local storm report, Jul 19, 1:56 AM CDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
156 AM CDT FRI JUL 19 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0101 AM     TSTM WND DMG     LA VALLE                43.58N 90.13W
07/19/2019                   SAUK               WI   LAW ENFORCEMENT

            A FEW TREES DOWN IN LA VALLE. TIME ESTIMATED
            FROM RADAR.

&&

WOOD

Local storm report, Jul 19, 2:17 AM CDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
217 AM CDT FRI JUL 19 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0145 AM     TSTM WND DMG     1 WSW LODI              43.31N 89.55W
07/19/2019                   COLUMBIA           WI   LAW ENFORCEMENT

            WIRES DOWN WEST OF LODI. TIME ESTIMATED FROM
            RADAR.

&&

WOOD

Special weather statement, Jul 19, 2:31 AM CDT, 26 minutes before

Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
231 AM CDT Fri Jul 19 2019

WIZ057-058-063-064-190815-
Dodge-Columbia-Jefferson-Dane-
231 AM CDT Fri Jul 19 2019

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN DANE...NORTHWESTERN
JEFFERSON AND SOUTHWESTERN DODGE COUNTIES...

At 231 AM CDT, a strong thunderstorm was located near Sun Prairie,
moving southeast at 35 mph.

Wind gusts of 50 to 55 mph are possible with this storm.

Locations impacted include...
Eastern Madison, Sun Prairie, Watertown, Lake Mills, Marshall,
Waterloo, Cottage Grove, Deerfield, Cambridge, Lake Ripley, Milford,
Deansville, East Bristol and Hubbleton.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4314 8930 4331 8919 4321 8873 4295 8888
TIME...MOT...LOC 0731Z 295DEG 29KT 4319 8915

MARQUARDT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 12:34 AM CDT	Severe Thunderstorm Warning	MKX	Sauk	41 min
Jul 19, 1:10 AM CDT	Severe Thunderstorm Warning	MKX	Sauk	50 min
Jul 19, 1:38 AM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane	52 min
Jul 19, 2:31 AM CDT	Special Weather Statement	MKX	Jefferson	44 min
Jul 19, 3:13 AM CDT	Special Weather Statement	MKX	Jefferson	32 min
Jul 19, 3:55 AM CDT	Areal Flood Advisory	MKX	Sauk	3 hr
Jul 19, 5:33 AM CDT	Special Weather Statement	MKX	Waukesha	57 min
Jul 19, 9:13 AM CDT	River Flood Warning	MKX	Sauk	60 hr
Jul 19, 9:13 AM CDT	River Flood Warning	MKX	Sauk	4 days

Nearby

Excessive Heat Warnings in Wisconsin, 2019 Every excessive heat warning in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.