Alert archive / Minnesota / Special Weather Statements in 2020

Special Weather Statement, NWS Twin Cities, MN

August 31, 2020Brown County, Minnesota

NWS Twin Cities, MN issued this special weather statement at Aug 31, 2020, 2:16 AM CDT for Brown County, Minnesota. It was in force for 29 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: Aug 31, 2020, 2:16 AM CDT (07:16 UTC)
Expired: Aug 31, 2020, 2:45 AM CDT
In force: 29 min
Issued by: NWS Twin Cities, MN

County Brown County, MN

The radar

The Minneapolis radar (KMPX), 114 km from the middle of the area, began a volume at 07:18 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, 7.3 hours before the alert went out and 111 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1442 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 226 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Twin Cities, MN wrote its last area forecast discussion before this special weather statement went out at Aug 30, 11:51 PM CDT, 2 hours 25 minutes earlier.

Area forecast discussion, Aug 30, 11:51 PM CDT, 2 hours 25 minutes before

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<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>
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Hazardous weather outlook, Aug 30, 3:10 PM CDT, 11 hours 6 minutes before

Hazardous Weather Outlook
National Weather Service Twin Cities/Chanhassen MN
310 PM CDT Sun Aug 30 2020

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
312015-
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-
310 PM CDT Sun Aug 30 2020

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

.DAY ONE...Tonight.

A few severe storms are possible in far western Minnesota this
evening. The primary threat would be damaging wind gusts and large
hail. Non-severe thunderstorms are possible across the remainder
of the area tonight.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotter activation may be needed across western Minnesota
this evening.

Borghoff

In the hours before

Special weather statement, Aug 30, 9:17 PM CDT, 4 hours 59 minutes before

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
917 PM CDT Sun Aug 30 2020

MNZ054-064-310300-
Yellow Medicine-Lac Qui Parle-
917 PM CDT Sun Aug 30 2020

...A STRONG THUNDERSTORM WILL AFFECT LAC QUI PARLE COUNTY...

At 917 PM CDT, a strong thunderstorm was located 6 miles northeast of
Moritz, or 13 miles northeast of Clear Lake, moving east at 60 mph.

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

Locations impacted include...
Madison, Dawson, Marietta, Cerro Gordo, Providence, and Florida
Creek Wildlife Management Area.

LAT...LON 4505 9645 4513 9602 4502 9587 4500 9583
      4496 9582 4493 9573 4491 9572 4490 9567
      4478 9645
TIME...MOT...LOC 0217Z 255DEG 50KT 4488 9646

Special weather statement, Aug 31, 2:16 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
216 AM CDT Mon Aug 31 2020

MNZ073>075-310745-
Brown-Nicollet-Redwood-
216 AM CDT Mon Aug 31 2020

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN REDWOOD...CENTRAL
BROWN AND NORTHWESTERN NICOLLET COUNTIES...

At 215 AM CDT, a strong thunderstorm was located near Springfield, or
20 miles southeast of Redwood Falls, moving east at 40 mph.

Winds in excess of 30 mph and dime size hail are possible with this
storm.

Locations impacted include...
New Ulm, Sleepy Eye, Evan, Cobden, Essig, St George and New Ulm
Airport.

LAT...LON 4423 9495 4433 9499 4445 9454 4429 9448
TIME...MOT...LOC 0715Z 258DEG 35KT 4428 9491

BPH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 30, 9:17 PM CDT	Special Weather Statement	MPX	Lac qui Parle	43 min
Aug 31, 2:49 AM CDT	Special Weather Statement	MPX	Nicollet	26 min

Nearby

Special Weather Statements in Minnesota, 2020 Every special weather statement in 2020

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.