Alert archive / Minnesota / Special Weather Statements in 2018

Special Weather Statement, NWS La Crosse, WI

May 25, 2018Mower County, Minnesota

NWS La Crosse, WI issued this special weather statement at May 25, 2018, 4:11 PM CDT for Mower County, Minnesota. It was in force for 34 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: May 25, 2018, 4:11 PM CDT (21:11 UTC)
Expired: May 25, 2018, 4:45 PM CDT
In force: 34 min
Issued by: NWS La Crosse, WI

County Mower County, MN

The radar

The La Crosse radar (KARX), 147 km from the middle of the area, began a volume at 21:14 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.2 hours before the alert went out and 151 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: 543 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 1022 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 245 m²/s²
0-3 km storm-relative helicity: 234 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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 May 25, 1:32 PM CDT, 2 hours 39 minutes earlier.

Area forecast discussion, May 25, 1:32 PM CDT, 2 hours 39 minutes before

Area Forecast Discussion
National Weather Service La Crosse WI
132 PM CDT Fri May 25 2018

.SHORT TERM...(Tonight through Saturday Night)
Issued at 132 PM CDT Fri May 25 2018

GOES-East water vapor imagery showing a mid-level trough moving east
through the Northern Plains into MN. Impressive plume of moisture
streaming into our area which is translating to a very warm/humid
airmass over the region. A few showers and storms were firing from
time to time in a line from north central WI into southeast MN in
this plume and in advance of this trough. Temperatures as of 2 pm
were in the 70s to middle 80s with dew points in the 60s.

Still a chance for a few strong storms later this afternoon into
this evening as the trough continues to push into/through our area.
Wind gusts to 40 mph, heavy downpours, and frequent lightning would
be the main threats along with some small hail. Look for the bulk of
this activity to exit south of the area around midnight. Could still
see a few pop-up showers overnight as a weak secondary mid-level
trough drops through the region. Overnight lows will be in the upper
50s to the middle 60s.

A few showers/storms will be possible over northern WI Saturday as
another weak trough rotates east through that area. Otherwise, look
very warm highs in the upper 80s to the lower 90s.

.LONG TERM...(Sunday through Friday)
Issued at 132 PM CDT Fri May 25 2018

The heat continues for Sunday into Memorial Day as a mid-level ridge
of high pressure amplifies across the region. 850mb temperatures
Sunday increase to near +20C while 925mb heats up into the +27 to
+30C range. This is expected to produce highs well into the 90s for
most places, nearing or exceeding record levels. See climate section
below. Memorial Day may end up a few degrees cooler as clouds will
be on the increase from convection over the Plains. Could also see a
few showers/storms rounding top of the ridge into our area as well.

Shower and thunderstorm chances will be on the increase Tuesday into
Wednesday as a mid-level trough nudges in from the Plains. Highs
will continue to be well above normal with readings well into the
80s.

Small-end shower/thunder chances continue Thursday into Friday as a
couple very weak troughs ripple over the mean ridge, Otherwise,
temperatures will continue to stay well above normal with highs in
the 80s.

&&

.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
Issued at 1235 PM CDT Fri May 25 2018

VFR conditions out there and should mostly remain the next 24 hours,
but we'll be watching a broken line of showers and thunderstorms
developing west of RST the next few hours. That line should then
gradually progress eastward into early evening, though remaining
questions about how widespread activity will become precludes any
specific timing mention for either LSE or RST (will have to watch
radar trends the next hour or two). Suffice it to say that a brief
period of MVFR or even IFR conditions is possible for either
location if a heavier storm crosses the terminal site, with some
gusty winds to 40 knots and small hail also possible in stronger
storms. In the wake of that activity, which should depart by 01Z for
LSE (earlier at RST), clearing skies are expected overnight, with
lots of sunshine into Saturday along with very warm temperatures and
light southerly winds.

&&

.CLIMATE...
Issued at 132 PM CDT Fri May 25 2018

High temperatures over the next few days will be in near or record
breaking territory. Here are the standing record highs and years
occurred for La Crosse and Rochester:

             Rochester           La Crosse

May 26       91 (1939)           94 (1967)

May 27       93 (1914)           96 (1874)

May 28       95 (2006)           95 (1874)

&&

.ARX WATCHES/WARNINGS/ADVISORIES...
WI...None.
MN...None.
IA...None.
&&

SHORT TERM...DAS
LONG TERM...DAS
AVIATION...Lawrence

Hazardous weather outlook, May 25, 5:15 AM CDT, 10 hours 56 minutes before

Hazardous Weather Outlook
National Weather Service La Crosse WI
515 AM CDT Fri May 25 2018

IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-261100-
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-
Clayton-Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Houston-
Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse-Monroe-Juneau-
Adams-Vernon-Crawford-Richland-Grant-
515 AM CDT Fri May 25 2018

This Hazardous Weather Outlook is for portions of southeast
Minnesota...northeast Iowa and southwest into central Wisconsin.

.DAY ONE...Today and Tonight

Thunderstorms are expected across the area this afternoon and
evening. Some of storms could become severe with damaging winds,
small hail and locally heavy rains the main threats between 3 and
10 pm.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Afternoon heat indices in the 90s are expected for the Memorial
Day weekend with Sunday the warmest day.

There will be small chance of thunderstorms Saturday afternoon
north of Interstate 94. Severe weather is not expected.

Periodic chances for thunderstorms will return Tuesday and
continue through Thursday. It is too early to determine if there
is a chance for any severe weather.

.SPOTTER INFORMATION STATEMENT...

A few spotter groups may be needed this afternoon and evening.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

04/Baumgardt

In the hours before

Local storm report, May 25, 2:57 PM CDT, 1 hour 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
257 PM CDT FRI MAY 25 2018

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

0254 PM     HAIL             SAINT CHARLES           43.97N 92.06W
05/25/2018  E0.75 INCH       WINONA             MN   LAW ENFORCEMENT

&&

LAWRENCE

Special weather statement, May 25, 3:25 PM CDT, 46 minutes before

Special Weather Statement
National Weather Service La Crosse WI
325 PM CDT FRI MAY 25 2018

MNZ088-252100-
Winona-
325 PM CDT FRI MAY 25 2018

...A STRONG THUNDERSTORM WILL AFFECT WINONA COUNTY...

At 323 PM CDT, a strong thunderstorm was located over Lewiston, or 11
miles southwest of Winona, moving east at 10 mph.

Winds in excess of 30 mph and half inch hail are possible with this
storm.

Locations impacted include...
Winona, Goodview, Lewiston, Fountain City, Stockton, Altura, Dakota,
New Hartford, Wilson, Dresbach, Hart, Fremont, Utica, Minnesota
City, Wyattville, and Ridgeway.

Torrential rainfall is also occurring with this storm, and may cause
some ponding of water. Do not drive your vehicle through any flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4404 9199 4412 9171 4410 9171 4410 9168
      4407 9166 4405 9161 4403 9159 4402 9151
      4401 9149 4400 9144 4397 9141 4394 9136
      4392 9136 4385 9128 4385 9192
TIME...MOT...LOC 2023Z 255DEG 10KT 4397 9186

DAS

Local storm report, May 25, 3:36 PM CDT, 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
336 PM CDT FRI MAY 25 2018

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

0331 PM     HAIL             ELEVA                   44.58N 91.47W
05/25/2018  E1.75 INCH       TREMPEALEAU        WI   LAW ENFORCEMENT

&&

Local storm report, May 25, 3:38 PM CDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
338 PM CDT FRI MAY 25 2018

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

0336 PM     HAIL             LEWISTON                43.98N 91.87W
05/25/2018  E1.00 INCH       WINONA             MN   LAW ENFORCEMENT

&&

Local storm report, May 25, 3:49 PM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
349 PM CDT FRI MAY 25 2018

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

0339 PM     HAIL             LEWISTON                43.98N 91.87W
05/25/2018  E0.75 INCH       WINONA             MN   PUBLIC

&&

Special weather statement, May 25, 4:11 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service La Crosse WI
411 PM CDT FRI MAY 25 2018

IAZ008-MNZ094-252145-
Mitchell-Mower-
411 PM CDT FRI MAY 25 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN MITCHELL AND
SOUTHWESTERN MOWER COUNTIES...

At 410 PM CDT, a strong thunderstorm was located near London, or near
Austin, moving southeast at 20 mph.

Nickel size hail is possible with this storm.

Locations impacted include...
Austin, Lyle, Rose Creek, Mapleview, Toeterville, County Roads 56 And
5, Otranto, Otranto Park, I 90 Exits 175 to 180, and Varco.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4372 9305 4366 9276 4341 9292 4347 9303
      4350 9303 4350 9305
TIME...MOT...LOC 2110Z 293DEG 16KT 4362 9305

Lawrence

The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 2:47 PM CDT	Special Weather Statement	ARX	Buffalo	28 min
May 25, 3:28 PM CDT	Severe Thunderstorm Warning	ARX	Trempealeau	32 min
May 25, 3:50 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Trempealeau	25 min
May 25, 4:21 PM CDT	Special Weather Statement	ARX	Trempealeau	24 min
May 25, 4:59 PM CDT	Special Weather Statement	ARX	La Crosse	31 min
May 25, 4:59 PM CDT	Severe Thunderstorm Warning	ARX	Clark, Taylor	46 min
May 25, 5:27 PM CDT	Severe Thunderstorm Warning	ARX	Vernon	48 min
May 25, 5:37 PM CDT	Severe Thunderstorm Warning	ARX	Taylor	35 min
May 25, 6:06 PM CDT	Severe Thunderstorm Warning	ARX	Crawford, Vernon	24 min
May 25, 6:43 PM CDT	Severe Thunderstorm Warning	ARX	Crawford	47 min
May 25, 5:38 PM CDT	Severe Thunderstorm Warning	ARX	Floyd, Mitchell	19 min
May 25, 6:18 PM CDT	Special Weather Statement	ARX	Chickasaw, Floyd, Winneshiek	42 min
May 25, 6:48 PM CDT	Severe Thunderstorm Warning	ARX	Allamakee	27 min
May 25, 6:55 PM CDT	Severe Thunderstorm Warning	ARX	Clayton, Fayette	50 min
May 25, 2:31 PM CDT	Special Weather Statement	ARX	Winona	44 min
May 25, 2:40 PM CDT	Severe Thunderstorm Warning	ARX	Olmsted, Winona	20 min
May 25, 3:25 PM CDT	Special Weather Statement	ARX	Winona	35 min
May 25, 3:36 PM CDT	Severe Thunderstorm Warning	ARX	Winona	39 min
May 25, 4:12 PM CDT	Severe Thunderstorm Warning	ARX	Winona	18 min
May 25, 4:43 PM CDT	Special Weather Statement	ARX	Mower	32 min

Nearby

Special Weather Statements in Minnesota, 2018 Every special weather statement in 2018

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.