Alert archive / Wisconsin / Special Weather Statements in 2019

Special Weather Statement, NWS Twin Cities, MN

July 18, 2019Pierce County, Wisconsin

NWS Twin Cities, MN issued this special weather statement at Jul 18, 2019, 4:48 AM CDT for Pierce County, Wisconsin. It was in force for 27 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, 2019, 4:48 AM CDT (09:48 UTC)
Expired
Jul 18, 2019, 5:15 AM CDT
In force
27 min
Issued by
NWS Twin Cities, MN

County Pierce County, WI

The radar

The Minneapolis radar (KMPX), 69 km from the middle of the area, began a volume at 09:52 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 00:00Z, 9.8 hours before the alert went out and 72 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2019-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 353 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2019-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
353 J/kg
Mixed-layer CIN
-324 J/kg
Mixed-layer LCL
1188 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
141 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The text

As transmitted.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</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 Twin Cities, MN wrote its last area forecast discussion before this special weather statement went out at Jul 18, 2:27 AM CDT, 2 hours 21 minutes earlier.

Area forecast discussion, Jul 18, 2:27 AM CDT, 2 hours 21 minutes before
Area Forecast Discussion
National Weather Service Twin Cities/Chanhassen MN
227 AM CDT Thu Jul 18 2019

.SHORT TERM...(Today through Friday)
Issued at 227 AM CDT Thu Jul 18 2019

Thunderstorms developed prior to midnight across northern Iowa along
the increasing low level jet and upper level jet streak moving
across southern Minnesota. This feature will aid in the continuation
of convection across the southwest, south central and portions of
east central Minnesota through sunrise, and possibly up to 9 am
local. Elsewhere, the convection across northeast South Dakota could
form more activity across central Minnesota during the morning.
Otherwise, once this activity moves off into Wisconsin, skies should
clear with the heat and humidity building. Heat indices will
approach or exceed 95 to 100 degrees by the afternoon. The heat
advisory may need to be extended farther to the northwest across
southwest, and west central Minnesota where heat indices will likely
exceed 100 degrees. Models are trying to develop another complex of
storms in south central/southeast Minnesota this evening. This is
where the higher percentages will be, with slight chance elsewhere.
The current flash flood watch will be allowed to expire at 7 am.
However, an additional watch could be issued based on the convection
expected across the same areas this evening. No other changes to the
forecast for tonight or Friday with the frontal boundary near the
area which will lead to additional thunderstorms likely.

.LONG TERM...(Friday night through Wednesday)
Issued at 227 AM CDT Thu Jul 18 2019

In the long term we experience a pattern transition which will
bring a trend toward mild and drier weather into next week.

To start out, however, we will still have fast westerly flow
across the region and the stalled boundary over the area, which
will be conducive to the potential for showers and thunderstorms with
heavy rainfall on Friday night & Saturday. By Sunday the front
finally looks to have shifted south of the area, so that is the
most likely day to be dry over the weekend.

Monday into the middle of next week there is good model agreement
that the large scale pattern will feature an amplified western
CONUS ridge and an eastern CONUS trough. While fleeting light
precipitation chances can't be ruled out as weak waves top the
western ridge, overall dry weather and near-normal temperatures
would be expected.

&&

.AVIATION...(For the 06Z TAFS through 06Z Thursday night)
Issued at 1107 PM CDT Wed Jul 17 2019

Showers and thunderstorms are expected to develop across southern
MN overnight, particularly southeast of a RWF-MSP-RNH line.
Another cluster of storms over central SD is heading east and
should weaken, but it will need to be watched. Otherwise, mostly
clear skies are likely through the period.

KMSP...Chances are MSP will probably miss out on the thunderstorm
activity tonight, with most of it staying south. Storms will be
close enough to continue the VCTS mention between 08-11Z.

/OUTLOOK FOR KMSP/
Fri...VFR. Isolated TSRA. Winds SW 5 kts becoming NW.
Sat...VFR. Chc TSRA. Wind NE 5 kts.
Sun...VFR. Wind N 5 kts.

&&

.MPX WATCHES/WARNINGS/ADVISORIES...
WI...Heat Advisory from noon today to 7 PM CDT Friday for WIZ023>028.

     Flash Flood Watch until 7 AM CDT this morning for WIZ026.

MN...Heat Advisory from noon today to 7 PM CDT Friday for MNZ060>063-
     067>070-074>078-082>085-091>093.

     Flash Flood Watch until 7 AM CDT this morning for MNZ076>078-
     083>085-092-093.

&&

SHORT TERM...JLT
LONG TERM...LS
AVIATION...BORGHOFF
Hazardous weather outlook, Jul 18, 1:35 AM CDT, 3 hours 13 minutes before
Hazardous Weather Outlook
National Weather Service Twin Cities/Chanhassen MN
135 AM CDT Thu Jul 18 2019

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
190645-
Douglas-Todd-Morrison-Mille Lacs-Kanabec-Stevens-Pope-Stearns-
Benton-Sherburne-Isanti-Chisago-Lac Qui Parle-Swift-Chippewa-
Kandiyohi-Meeker-Wright-Hennepin-Anoka-Ramsey-Washington-
Yellow Medicine-Renville-McLeod-Sibley-Carver-Scott-Dakota-
Redwood-Brown-Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth-
Waseca-Steele-Martin-Faribault-Freeborn-Polk-Barron-Rusk-
St. Croix-Pierce-Dunn-Pepin-Eau Claire-
135 AM CDT Thu Jul 18 2019

This Hazardous Weather Outlook is for portions of central and
southern Minnesota...and west central Wisconsin.

.DAY ONE...Tonight

Through 6 AM, the main weather hazard will be locally torrential
rainfall, especially in the flash flood watch area.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

A Heat Advisory is in effect Thursday afternoon through Friday
for south central and east central Minnesota into west central
Wisconsin. Heat indices both days will reach 100 to 105 during the
afternoon.

There is a chance for additional thunderstorms from late Thursday
though the weekend, with a few severe storms possible over that
time period along with locally heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotter activation will not be needed.

In the hours before

Special weather statement, Jul 18, 3:31 AM CDT, 1 hour 17 minutes before
Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
331 AM CDT Thu Jul 18 2019

MNZ075-076-083-084-180900-
Le Sueur-Waseca-Blue Earth-Nicollet-
331 AM CDT Thu Jul 18 2019

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN LE SUEUR...NORTHEASTERN
BLUE EARTH...NORTHWESTERN WASECA AND SOUTHEASTERN NICOLLET
COUNTIES...

At 330 AM CDT, a strong thunderstorm was located over Mankato, moving
east at 60 mph.

Winds in excess of 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Mankato, North Mankato, St. Peter, Eagle Lake, Waterville, Madison
Lake, Kasota, Elysian, Cleveland, Skyline, Kilkenny and Mankato
Airport.

This includes the following highways...
 U.S. Highway 14 between mile markers 126 and 143.
 U.S. Highway 169 between mile markers 49 and 62.

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

LAT...LON 4406 9413 4427 9408 4439 9352 4419 9352
TIME...MOT...LOC 0830Z 250DEG 53KT 4419 9394

JLT
Special weather statement, Jul 18, 4:11 AM CDT, 37 minutes before
Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
411 AM CDT Thu Jul 18 2019

MNZ063-069-070-078-180945-
Washington-Dakota-Goodhue-Scott-
411 AM CDT Thu Jul 18 2019

...A LINE OF STORMS WILL AFFECT DAKOTA...EASTERN SCOTT...NORTHWESTERN
GOODHUE AND SOUTHWESTERN WASHINGTON COUNTIES...

At 411 AM CDT, radar indicated strong thunderstorms were located
along a line extending from near Prior Lake to near Stanton. Movement
was northeast at 55 mph.

Winds in excess of 40 mph and dime size hail are possible with these
storms.

Locations impacted include...
Northfield, Bloomington, Eagan, Burnsville, Lakeville, Apple Valley,
Shakopee, Cottage Grove, Inver Grove Heights, Savage, Prior Lake and
Hastings.

This includes the following highways...
 Interstate 35 between mile markers 75 and 80.
 U.S. Highway 61 between mile markers 101 and 104.

Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through 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 4452 9328 4454 9328 4454 9334 4467 9364
      4479 9337 4481 9325 4486 9320 4491 9309
      4471 9272 4463 9262 4446 9304 4447 9316
TIME...MOT...LOC 0911Z 243DEG 47KT 4467 9346 4451 9310

JLT
Special weather statement, Jul 18, 4:18 AM CDT, 30 minutes before
Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
418 AM CDT Thu Jul 18 2019

MNZ041-047-048-180945-
Stevens-Pope-Douglas-
418 AM CDT Thu Jul 18 2019

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN DOUGLAS...POPE AND
EASTERN STEVENS COUNTIES...

At 417 AM CDT, a strong thunderstorm was located over Morris, moving
northeast at 55 mph.

Winds in excess of 40 mph and nickel size hail are possible with this
storm.

Locations impacted include...
Alexandria, Morris, Glenwood, Starbuck, Hancock, Lowry, Kensington,
Cyrus, Donnelly, Holmes City, Villard and Forada.

This includes the following highways...
 Interstate 94 in Minnesota between mile markers 96 and 107.
 U.S. Highway 59 between mile markers 158 and 176.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through 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 4565 9607 4576 9582 4576 9577 4579 9576
      4597 9536 4549 9514 4541 9571 4541 9586
TIME...MOT...LOC 0917Z 243DEG 47KT 4559 9585

JLT
Special weather statement, Jul 18, 4:44 AM CDT, 4 minutes before
Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
444 AM CDT Thu Jul 18 2019

MNZ048-055-057-181015-
Kandiyohi-Pope-Swift-
444 AM CDT Thu Jul 18 2019

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN POPE...NORTHEASTERN
SWIFT AND NORTHWESTERN KANDIYOHI COUNTIES...

At 443 AM CDT, a strong thunderstorm was located near Lake Hassel, or
21 miles southeast of Morris, moving east at 40 mph.

Wind gusts up to 50 mph and nickel size hail are possible with this
storm.

Locations impacted include...
Brooten, Lake Hassel, Gilchrist, Sunburg and Swift Falls.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through 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 4554 9513 4542 9513 4541 9509 4532 9507
      4537 9561 4552 9562
TIME...MOT...LOC 0943Z 273DEG 36KT 4543 9552

JLT
Local storm report, Jul 18, 4:47 AM CDT, 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
447 AM CDT THU JUL 18 2019

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

0425 AM     HAIL             1 SSW PRIOR LAKE        44.70N 93.43W
07/18/2019  E1.75 INCH       SCOTT              MN   TRAINED SPOTTER

&&

LS
Special weather statement, Jul 18, 4:48 AM CDT, 0 minutes before
Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
448 AM CDT Thu Jul 18 2019

MNZ063-070-WIZ024-181015-
Washington-Dakota-Pierce-
448 AM CDT Thu Jul 18 2019

...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL DAKOTA...
SOUTHEASTERN WASHINGTON AND NORTHWESTERN PIERCE COUNTIES...

At 448 AM CDT, a strong thunderstorm was located over Prescott, or 12
miles southwest of River Falls, moving northeast at 50 mph.

Winds in excess of 40 mph and dime size hail are possible with this
storm.

Locations impacted include...
River Falls, Cottage Grove, Hastings, Prescott, Ellsworth,
Beldenville, Kinnickinnic State Park, Point Douglas and Afton State
Park.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through 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 4467 9287 4482 9290 4486 9267 4486 9246
      4471 9240 4469 9269 4471 9273 4468 9274
TIME...MOT...LOC 0948Z 244DEG 42KT 4476 9283

JLT

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 18, 2:04 AM CDTSpecial Weather StatementMPXFaribault41 min
Jul 18, 3:31 AM CDTSpecial Weather StatementMPXLe Sueur29 min
Jul 18, 4:11 AM CDTSpecial Weather StatementMPXDakota, Scott34 min
Jul 18, 4:18 AM CDTSpecial Weather StatementMPXPope, Stevens27 min
Jul 18, 4:28 AM CDTSevere Thunderstorm WarningMPXDakota, Scott17 min
Jul 18, 4:44 AM CDTSpecial Weather StatementMPXPope31 min
Jul 18, 4:50 AM CDTSevere Thunderstorm WarningMPXKandiyohi, Pope, Stearns, Swift25 min
Jul 18, 5:59 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Faribault, Waseca31 min
Jul 18, 6:35 PM CDTTornado WarningMPXMartin25 min
Jul 18, 6:37 PM CDTTornado WarningMPXWaseca23 min
Jul 18, 6:58 PM CDTTornado WarningMPXFaribault, Martin32 min

Nearby

Special Weather Statements in Wisconsin, 2019Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.