Alert archive / Minnesota / Special Weather Statements in 2018

Special Weather Statement, NWS Twin Cities, MN

September 18, 20184 counties in Minnesota

NWS Twin Cities, MN issued this special weather statement at Sep 18, 2018, 4:07 AM CDT for 4 counties in Minnesota. It was in force for 68 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: Sep 18, 2018, 4:07 AM CDT (09:07 UTC)
Expired: Sep 18, 2018, 5:15 AM CDT
In force: 68 min
Issued by: NWS Twin Cities, MN

Counties Dakota County, MN, McLeod County, MN, Renville County, MN, Scott County, MN

The radar

The Minneapolis radar (KMPX), 47 km from the middle of the area, began a volume at 09:07 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, 9.1 hours before the alert went out and 45 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: 1687 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 212 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 Sep 18, 3:38 AM CDT, 29 minutes earlier.

Area forecast discussion, Sep 18, 3:38 AM CDT, 29 minutes before

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Hazardous weather outlook, Sep 17, 1:06 PM CDT, 15 hours 1 minute before

Hazardous Weather Outlook
National Weather Service Twin Cities/Chanhassen MN
106 PM CDT Mon Sep 17 2018

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
181815-
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-
106 PM CDT Mon Sep 17 2018

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

.DAY ONE...This Afternoon and Tonight

There is a Marginal Risk of severe thunderstorms this afternoon
and evening south of a line from near Appleton to St. Cloud and
Eau Claire. Damaging wind gusts and large hail are the main
threats.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Several rounds of showers and thunderstorms are expected Tuesday
through Thursday. The main threat will be heavy rainfall with
several inches possible. This may lead to localized flooding.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotter activation will not be needed.

In the hours before

Special weather statement, Sep 18, 12:52 AM CDT, 3 hours 15 minutes before

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Special weather statement, Sep 18, 1:32 AM CDT, 2 hours 35 minutes before

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Special weather statement, Sep 18, 2:09 AM CDT, 1 hour 58 minutes before

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Special weather statement, Sep 18, 3:48 AM CDT, 19 minutes before

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Special weather statement, Sep 18, 4:06 AM CDT, 1 minute before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Twin Cities/Chanhassen MN
406 AM CDT TUE SEP 18 2018

MNZ065>070-181015-
Dakota-McLeod-Carver-Sibley-Renville-Scott-
406 AM CDT TUE SEP 18 2018

...VERY HEAVY RAIN AND LOCALIZED MINOR FLOODING EXPECTED...

VERY HEAVY RAIN WITH THE POTENTIAL FOR LOCALIZED FLOODING WILL AFFECT
THE FOLLOWING COUNTIES...

Dakota...McLeod...Carver...Sibley...Renville...Scott...

...VERY HEAVY RAIN AND LOCALIZED MINOR FLOODING EXPECTED...

VERY HEAVY RAIN WITH THE POTENTIAL FOR LOCALIZED FLOODING WILL AFFECT
THE FOLLOWING COUNTIES...

McLeod...Carver...Sibley...Renville...

At 401 AM CDT...A line of strong thunderstorms with heavy rainfall
was nearly stationary from northern Renville County, to southern
Carver County, to Dakota County. Expect the possibility of 2 to 4
inches during the next couple hours which may lead to flooding.

LOCATIONS IMPACTED INCLUDE...
Burnsville, Lakeville, Apple Valley, Shakopee, Savage, Prior Lake,
Farmington, Belle Plaine, Glencoe, Jordan, Cannon Falls and Carver.

This includes Mystic Lake Casino.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

LAT...LON 4489 9547 4489 9529 4486 9433 4467 9273
      4463 9279 4454 9280 4453 9292 4476 9549
TIME...MOT...LOC 0904Z 180DEG 0KT 4478 9439

BORGHOFF

Special weather statement, Sep 18, 4:07 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE Twin Cities/Chanhassen MN
407 AM CDT TUE SEP 18 2018

MNZ065>070-181015-
Dakota-McLeod-Carver-Sibley-Renville-Scott-
407 AM CDT TUE SEP 18 2018

...VERY HEAVY RAIN AND LOCALIZED MINOR FLOODING EXPECTED...

VERY HEAVY RAIN WITH THE POTENTIAL FOR LOCALIZED FLOODING WILL AFFECT
THE FOLLOWING COUNTIES...

Dakota...McLeod...Carver...Sibley...Renville...Scott...

At 401 AM CDT...A line of strong thunderstorms with heavy rainfall
was nearly stationary from northern Renville County, to southern
Carver County, to Dakota County. Expect the possibility of 2 to 4
inches during the next couple hours which may lead to flooding.

LOCATIONS IMPACTED INCLUDE...
Burnsville, Lakeville, Apple Valley, Shakopee, Savage, Prior Lake,
Farmington, Belle Plaine, Glencoe, Jordan, Cannon Falls and Carver.

This includes Mystic Lake Casino.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

LAT...LON 4489 9547 4489 9529 4486 9433 4467 9273
      4463 9279 4454 9280 4453 9292 4476 9549
TIME...MOT...LOC 0904Z 180DEG 0KT 4478 9439

BORGHOFF

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 17, 11:19 PM CDT	Special Weather Statement	MPX	Dakota	26 min
Sep 18, 12:52 AM CDT	Special Weather Statement	MPX	Lac qui Parle	38 min
Sep 18, 1:32 AM CDT	Special Weather Statement	MPX	Chippewa	43 min
Sep 18, 2:09 AM CDT	Special Weather Statement	MPX	Hennepin, Ramsey	51 min
Sep 18, 3:48 AM CDT	Special Weather Statement	MPX	Renville	27 min
Sep 18, 4:06 AM CDT	Special Weather Statement	MPX	Dakota, McLeod, Renville, Scott	69 min
Sep 18, 6:20 AM CDT	Special Weather Statement	MPX	Redwood	40 min
Sep 18, 7:01 AM CDT	Special Weather Statement	MPX	Brown, Martin, Watonwan	59 min
Sep 18, 7:31 AM CDT	Special Weather Statement	MPX	McLeod, Nicollet, Sibley	29 min
Sep 18, 7:39 AM CDT	Special Weather Statement	MPX	Blue Earth, Faribault, Waseca	51 min
Sep 18, 8:00 AM CDT	Special Weather Statement	MPX	Carver, Hennepin, Le Sueur, Scott	30 min
Sep 18, 8:30 AM CDT	Special Weather Statement	MPX	Dakota, Freeborn, Goodhue, Hennepin, Ramsey, Rice and 4 more	30 min
Sep 17, 11:54 PM CDT	Special Weather Statement	MPX	Pierce	36 min
Sep 18, 12:47 AM CDT	Special Weather Statement	MPX	Pepin, Pierce	43 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.