Alert archive / Minnesota / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 153, NWS Twin Cities, MN

September 20, 20185 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 20, 2018, 6:23 PM CDT for 5 counties in Minnesota. It was in force for 52 min. 32 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 20, 2018, 6:23 PM CDT (23:23 UTC)
Expired: Sep 20, 2018, 7:15 PM CDT
In force: 52 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 70.0 mph

Counties Freeborn County, MN, Le Sueur County, MN, Rice County, MN, Steele County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 84 km from the middle of the area, began a volume at 23:23 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 was reported inside it

Time	Report	Where	Remark
Sep 20, 6:23 PM CDT	TSTM WND DMG	Elysian, MN	ONE HALF OF A TREE SNAPPED. NO DIAMETER OR PHOTO PROVIDED.
Sep 20, 6:26 PM CDT	TSTM WND DMG	5 S Waseca, MN	STORM CHASER CALLED TO REPORT MULTIPLE 6-12 INCH TREE BRANCHES DOWN. POWER POLE AND 18 INCH PINE TREE ALSO SNAPPED. NO PHOTOS PROVIDED.
Sep 20, 6:26 PM CDT	TORNADO	2 Sw Waterville, MN	EF1 TORNADO TRACKED 7.7 MILES NORTHEAST INTO WESTERN RICE COUNTY.
Sep 20, 6:30 PM CDT	TSTM WND DMG	1 E Waterville, MN	TWEET WITH PHOTOS OF TREES DOWN AND MINOR DAMAGE TO WATERVILLE-ELYSIAN-MORRISTOWN HIGH SCHOOL.
Sep 20, 6:30 PM CDT	TSTM WND DMG	1 E Waterville, MN	PHOTO RELAYED VIA TWITTER OF TREES AND POWER LINES DOWN ACROSS ROAD.
Sep 20, 6:30 PM CDT	TSTM WND DMG	3 Nnw Alden, MN	MULTIPLE TREES AND POWER LINES DOWN. ROOFS OFF OUTBUILDINGS. TIME APPROXIMATE.
Sep 20, 6:30 PM CDT	TSTM WND DMG	Waterville, MN	NUMEROUS TREES DOWN AROUND WATERVILLE.
Sep 20, 6:30 PM CDT	TORNADO	1 E Waseca, MN	EF1 TORNADO TRACKED 27.8 MILES NORTHEAST THROUGH MEDFORD AND ENDED IN SOUTHWEST GOODHUE COUNTY. SEVERAL FARMSTEADS WERE HEAVILY DAMAGED OR DESTROYED.
Sep 20, 6:32 PM CDT	TORNADO	Morristown, MN	EF2 TORNADO TRACKED NORTHEAST 25.8 MILES. SEVERAL HOMES WERE DESTROYED IN SOUTHERN MORRISTOWN.
Sep 20, 6:35 PM CDT	TSTM WND DMG	Morristown, MN	NUMEROUS TREES DOWN FROM MORRISTOWN TO WATERVILLE.
Sep 20, 6:35 PM CDT	TSTM WND GST 61	3 Wsw Waseca, MN	AWOS STATION ACQ, WASECA AP.
Sep 20, 6:36 PM CDT	TSTM WND GST 52	2 W Owatonna, MN	CORRECTS PREVIOUS TSTM WND GST REPORT FROM 2 W OWATONNA. REPORT RELAYED BY STEELE COUNTY EM FROM TRAINED SPOTTER.
Sep 20, 6:38 PM CDT	TORNADO	6 Nne Morristown, MN	EF1 TORNADO TRACKED NORTHEAST 7.7 MILES.
Sep 20, 6:39 PM CDT	TSTM WND DMG	Medford, MN	PUBLIC REPORT OF TREES UPROOTED AND SNAPPED AT THE BASE IN MEDFORD.
Sep 20, 6:39 PM CDT	TORNADO	6 Wnw Faribault, MN	TORNADO SPUN UP 6 WNW FARIBAULT, TRACKED ACROSS ROBERDS LAKE AND I-35, BEFORE ENDING 5 N FARIBAULT. THE MOST EXTENSIVE DAMAGE OCCURRED ON THE EAST SIDE OF ROBERDS LAKE WHERE NUMEROUS HOMES, BOATS, AND TREES WERE DAMAGED. WITNESS STATED THE WATER WAS BEING BLOW
Sep 20, 6:42 PM CDT	TSTM WND GST 110	3 Nw Faribault, MN	SEVERE THUNDERSTORM WINDS OCCURRED FROM ABOUT 4 NW OF MORRISTOWN EAST TO THE SOUTHERN SIDE OF THE NORTHWEST FARIBAULT TORNADO, (INCLUDING THE FARIBAULT AIRPORT AREA), TO CANNON FALLS. WINDS WERE MOST EXTREME NEAR THE AIRPORT WITH ESTIMATED SPEEDS AROUND 110 MP
Sep 20, 6:42 PM CDT	TORNADO	3 Nne Medford, MN	CALLED IN TO REPORT TREES DOWN AND UPROOTED. A ROOF WAS BLOWN OFF A SHED AND THERE ARE ROAD BLOCKAGES. RADAR CONFIRMED TORNADO.
Sep 20, 6:43 PM CDT	TSTM WND DMG	1 N Faribault, MN	TWEET WITH PHOTOS OF STRUCTURAL DAMAGE TO METCON BUILDING AND SIGNIFICANT TREE DAMAGE NEARBY.
Sep 20, 6:43 PM CDT	TSTM WND GST 52	2 W Owatonna, MN	REPORT RELAYED BY STEELE COUNTY EM FROM TRAINED SPOTTER.
Sep 20, 6:43 PM CDT	TORNADO	1 Nw Faribault, MN	SECOND-HAND RELAY FROM STORM SPOTTERS OF A TORNADO CROSSING I-35 NEAR FARIBAULT. NO PHOTO PROVIDED.
Sep 20, 6:43 PM CDT	TORNADO	6 Wsw Dundas, MN	EF1 TORNADO TRACKED NORTHEAST 14.3 MILES.
Sep 20, 6:44 PM CDT	TSTM WND DMG	1 Ne Owatonna, MN
Sep 20, 6:44 PM CDT	TSTM WND DMG	Faribault, MN	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM FARIBAULT. PUBLIC REPORT OF NUMEROUS TREES DOWN IN FARIBAULT. MAXIMUM DIAMETER ESTIMATED TO BE 2 FEET. NO PHOTOS PROVIDED.
Sep 20, 6:45 PM CDT	TSTM WND DMG	3 Nw Faribault, MN	SIGNIFICANT DAMAGE AT FARIBAULT AIRPORT. PLANES FLIPPED. OTHER DAMAGE REPORTS JUST COMING IN TO RICE COUNTY EM.
Sep 20, 6:48 PM CDT	TORNADO	3 Wsw Dundas, MN	EF0 TORNADO TRACKED 3.8 MILES TO DUNDAS.
Sep 20, 6:50 PM CDT	TSTM WND DMG	1 Se Owatonna, MN	SEVERAL TREES DOWN PER SKYWARN GROUP ON SOCIAL MEDIA.
Sep 20, 6:50 PM CDT	TSTM WND DMG	2 Se Northfield, MN	FROM FACEBOOK, NWS EMPLOYEE RELAYED PHOTO OF DESTROYED RED BARN PIZZA PLACE.
Sep 20, 6:52 PM CDT	TSTM WND DMG	3 Nnw Dennison, MN	FROM FACEBOOK, NWS EMPLOYEE RELAYED FROM RELATIVES THAT A SHED HAD BLOWN AND LARGE TREES HAD BEEN BLOWN DOWN.
Sep 20, 6:52 PM CDT	TSTM WND DMG	4 W Dennison, MN	FROM FACEBOOK, NWS EMPLOYEE RELAYED FROM RELATIVES THAT MANY LARGE PINE TREES WERE DOWN AND A CAMPER WAS MOVED.
Sep 20, 6:53 PM CDT	TORNADO	2 E Northfield, MN	EF1 TORNADO TRACKED EASTWARD 8.9 MILES.
Sep 20, 6:54 PM CDT	TORNADO	3 E Northfield, MN	MPING REPORT OF A TORNADO.
Sep 20, 6:55 PM CDT	TSTM WND DMG	1 Nnw Owatonna, MN	CORRECTS TIME - REPORT FROM 1 NNW OWATONNA. STEELE COUNTY EM CALLED TO REPORT NUMEROUS 6-12 INCH TREES SNAPPED AND DOWN IN OWATONNA.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 21 storm reports to this severe thunderstorm warning; the first came 0 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 20, 3:33 PM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.4 hours before the alert went out and 85 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: 18 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 461 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 195 m²/s²
0-3 km storm-relative helicity: 20 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

172 
WUUS53 KMPX 202323
SVRMPX
MNC047-079-131-147-161-210015-
/O.NEW.KMPX.SV.W.0153.180920T2323Z-180921T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
623 PM CDT THU SEP 20 2018

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Freeborn County in south central Minnesota...
  Le Sueur County in south central Minnesota...
  Steele County in south central Minnesota...
  Rice County in south central Minnesota...
  Eastern Waseca County in south central Minnesota...

* Until 715 PM CDT.

* At 623 PM CDT, severe thunderstorms were located along a line
  extending from near Lake Jefferson to near Janesville to near
  Waldorf to near Wells to near Bricelyn, moving northeast at 75 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Severe thunderstorms will be near...
  Waterville and Elysian around 630 PM CDT.
  Waseca, Montgomery, New Richland, Morristown and Warsaw around 635 
  PM CDT.
  Faribault and Lonsdale around 640 PM CDT.
  Webster, Medford and Clarks Grove around 645 PM CDT.
  Northfield, Dundas, Ellendale and Geneva around 650 PM CDT.
  Owatonna around 655 PM CDT.
  Nerstrand around 700 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

&&

A Tornado Watch remains in effect until 1100 PM CDT for south central
and east central Minnesota.

LAT...LON 4381 9365 4386 9361 4411 9357 4424 9377
      4424 9391 4455 9374 4454 9328 4447 9328
      4447 9304 4350 9305 4350 9365
TIME...MOT...LOC 2323Z 230DEG 66KT 4426 9371 4411 9367 4393 9374 4370
9374 4355 9387

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
 
$$

BORGHOFF

3 follow-up statements

926 
WWUS53 KMPX 202352
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
652 PM CDT THU SEP 20 2018

MNC079-210001-
/O.CAN.KMPX.SV.W.0153.000000T0000Z-180921T0015Z/
Le Sueur MN-
652 PM CDT THU SEP 20 2018

...THE SEVERE THUNDERSTORM WARNING FOR LE SUEUR COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1100 PM CDT for south central
and east central Minnesota.

LAT...LON 4386 9348 4411 9345 4454 9345 4454 9328
      4447 9328 4447 9304 4350 9305 4350 9365
TIME...MOT...LOC 2351Z 230DEG 66KT 4459 9315 4444 9312 4426 9319 4403
9319 4388 9332

$$

MNC047-131-147-161-210015-
/O.CON.KMPX.SV.W.0153.000000T0000Z-180921T0015Z/
Freeborn MN-Steele MN-Rice MN-Waseca MN-
652 PM CDT THU SEP 20 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR FREEBORN...STEELE...RICE AND EASTERN WASECA COUNTIES...

At 651 PM CDT, severe thunderstorms were located along a line
extending from near Castle Rock to near Northfield to Ruskin to near
Owatonna to Ellendale, moving northeast at 75 mph.

HAZARD...70 mph wind gusts.

SOURCE...Law enforcement.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

These severe storms will be near...
  Northfield around 655 PM CDT.
  Nerstrand around 700 PM CDT.

Other locations impacted by these severe thunderstorms include Albert
Lea Airport, Lemond, Myrtle, Bridgewater, Owatonna Airport, Clinton
Falls, Merton, Ruskin, Faribault Airport and Manchester.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

A Tornado Watch remains in effect until 1100 PM CDT for south central
and east central Minnesota.

LAT...LON 4386 9348 4411 9345 4454 9345 4454 9328
      4447 9328 4447 9304 4350 9305 4350 9365
TIME...MOT...LOC 2351Z 230DEG 66KT 4459 9315 4444 9312 4426 9319 4403
9319 4388 9332

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
 
$$

JLT

189 
WWUS53 KMPX 210000
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
700 PM CDT THU SEP 20 2018

MNC161-210010-
/O.CAN.KMPX.SV.W.0153.000000T0000Z-180921T0015Z/
Waseca MN-
700 PM CDT THU SEP 20 2018

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WASECA COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1100 PM CDT for south central
Minnesota.

LAT...LON 4352 9330 4420 9318 4447 9327 4447 9305
      4351 9305
TIME...MOT...LOC 0000Z 230DEG 66KT 4468 9300 4453 9297 4435 9304 4412
9304 4397 9317

$$

MNC047-131-147-210015-
/O.CON.KMPX.SV.W.0153.000000T0000Z-180921T0015Z/
Freeborn MN-Steele MN-Rice MN-
700 PM CDT THU SEP 20 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR EASTERN FREEBORN...EASTERN STEELE AND EASTERN RICE COUNTIES...

At 700 PM CDT, severe thunderstorms were located along a line
extending from Vermillion to Lake Byllesby to Nerstrand to near
County Roads 1 And 24 to near Steele Center, moving northeast at 75
mph.

HAZARD...70 mph wind gusts.

SOURCE...Law enforcement.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

These severe thunderstorms will remain over mainly rural areas of
eastern Freeborn...eastern Steele and eastern Rice Counties,
including the following locations... Merton, Ruskin, Myrtle, Steele
Center, Bridgewater, Bixby and Moland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

A Tornado Watch remains in effect until 1100 PM CDT for south central
Minnesota.

LAT...LON 4352 9330 4420 9318 4447 9327 4447 9305
      4351 9305
TIME...MOT...LOC 0000Z 230DEG 66KT 4468 9300 4453 9297 4435 9304 4412
9304 4397 9317

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...70MPH
 
$$

JLT

638 
WWUS53 KMPX 210011
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
711 PM CDT THU SEP 20 2018

MNC047-131-147-210021-
/O.EXP.KMPX.SV.W.0153.000000T0000Z-180921T0015Z/
Freeborn MN-Steele MN-Rice MN-
711 PM CDT THU SEP 20 2018

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN FREEBORN...EASTERN
STEELE AND EASTERN RICE COUNTIES WILL EXPIRE AT 715 PM CDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

A Tornado Watch remains in effect until 1100 PM CDT for south central
Minnesota.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
The Twin Cities.

LAT...LON 4352 9330 4420 9318 4447 9327 4447 9305
      4351 9305
TIME...MOT...LOC 0011Z 230DEG 66KT 4479 9281 4464 9278 4446 9285 4423
9285 4409 9298

$$

JLT

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Sep 20, 2:49 PM CDT, 3 hours 34 minutes earlier.

Area forecast discussion, Sep 20, 2:49 PM CDT, 3 hours 34 minutes before

Area Forecast Discussion
National Weather Service Twin Cities/Chanhassen MN
249 PM CDT Thu Sep 20 2018

.SHORT TERM...(This evening through Friday)
Issued at 250 PM CDT Thu Sep 20 2018

Elevated thunderstorms developed along the moisture gradient
across Southwestern and Central MN with heavy rain and wind gusts
near 30- 35 kts. Clearing and an increase in MUCAPE has been
noticed across South Central MN. This clearing trend is expected
to continue through the early afternoon and help destabilized the
boundary layer with near 3000 J/kg of SBCAPE expected by 21Z
(according to the RAP). The surface low will continue to deepen as
it progresses northeastward with its placement over the NE/IA/SD
border at 1930Z.

An Enhanced Risk of Severe Weather remains in place due to the
concern for severe wind, tornado, and hail during the late afternoon
and evening. Thunderstorms are expected to develop along a cold
front with the main mode being linear. However, a few isolated cells
could develop ahead of this line. Bulk shear is expected to be near
60 kts by 00Z across Southern MN and Western WI as 850 mb winds
increase to 50 kts.  LCL values are expected to be near 1000 m and
DCAPE will be near 1300 J/kg, so severe winds will be possible along
the cold front. SFC to 1 km shear will be near 30-40 kts which is
supports the tornado potential.

Storms are expected to exit to the east overnight by 06Z with cold
air advection to follow. Winds will be windy with gusts near 25-30
kts common Friday morning.

.LONG TERM...(Friday night through Thursday)
Issued at 250 PM CDT Thu Sep 20 2018

Surface high pressure will be in place to start the long term
period, which will make for a cool start to Saturday morning. With
light winds and clear skies, expect lows to dip into the mid 30s
from parts of central MN across west central WI. Therefore areas
north of I-94 will have the potential for the first frost of the
season. High pressure prevails through the weekend and brings quiet
and dry weather, with highs in the 60s on Saturday. Temps moderate a
tad on Sunday as the high pressure begins to shift southeast and
southerly flow develops. Expect highs in the mid 60s to lower 70s.

Monday and Monday night there is decent agreement amongst the models
that a decent shortwave trough will move across the north central
CONUS and push a front across the area. Have included high chance
POPs.

Behind this system temperatures cool down slightly below normal,
with highs in the 60s and lows in the 40s.

&&

.AVIATION...(For the 18Z TAFS through 18Z Friday afternoon)
Issued at 1241 PM CDT Thu Sep 20 2018

MVFR/IFR ceilings will prevail through this period. Two rounds of
thunderstorms are expected. The first round is a cluster of
thunderstorms that will continue lifting north through Central MN
and Western WI this afternoon. The second round is expected to
develop as a line over Southwestern MN and lift northwest into
Western WI this evening. After that, status and breezy westerly
to northwesterly winds will follow and continue through Friday
morning.

KMSP... Thunderstorm chances will continue through the early
afternoon. There may be a gap in activity near 21Z before the
next round of thunderstorms arrives after 23Z. Thunderstorm
activity is end near 01Z, but low clouds and breezy winds will
continue. MVFR/IFR conditions are anticipated through late Friday
morning.

/OUTLOOK FOR KMSP/
Fri PM...VFR. Wind NW 15G25 kts.
Sat...VFR. Wind SW 5-10 kts.
Sun...VFR. Wind SE 5-10 kts.

&&

.MPX WATCHES/WARNINGS/ADVISORIES...
WI...None.
MN...None.
&&

SHORT TERM...AMK
LONG TERM...LS
AVIATION...AMK

Hazardous weather outlook, Sep 20, 10:21 AM CDT, 8 hours 2 minutes before

Hazardous Weather Outlook
National Weather Service Twin Cities/Chanhassen MN
1021 AM CDT Thu Sep 20 2018

MNZ051>053-058>063-065>070-073>078-082>085-091>093-WIZ014>016-
023>028-211530-
Sherburne-Isanti-Chisago-Meeker-Wright-Hennepin-Anoka-Ramsey-
Washington-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-Chippewa-Eau Claire-
1021 AM CDT Thu Sep 20 2018

This Hazardous Weather Outlook is for portions of central
Minnesota...east central Minnesota...south central Minnesota...
southeast Minnesota...southwest Minnesota...northwest Wisconsin
and west central Wisconsin.

.DAY ONE...Today and Tonight

Severe thunderstorms are possible this afternoon in south
central and east central Minnesota, as well as in west central
Wisconsin. The primary risk will be strong winds. Large hail and
heavy rain will also be possible, along with a few tornadoes.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

There is a chance of thunderstorms on Monday.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotter activation will likely be needed this afternoon
and early evening.

MNZ041>045-047>050-054>057-064-211530-
Douglas-Todd-Morrison-Mille Lacs-Kanabec-Stevens-Pope-Stearns-
Benton-Lac Qui Parle-Swift-Chippewa-Kandiyohi-Yellow Medicine-
1021 AM CDT Thu Sep 20 2018

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

.DAY ONE...Today and Tonight

Thunderstorms are possible this afternoon. The threat for severe
weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

There is a chance of thunderstorms on Monday.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotter activation will not be needed.

In the hours before

Special weather statement, Sep 20, 4:50 PM CDT, 1 hour 33 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Twin Cities/Chanhassen MN
450 PM CDT THU SEP 20 2018

MNZ060-062-063-070-202315-
Washington-Dakota-Hennepin-Ramsey-
450 PM CDT THU SEP 20 2018

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

Very heavy rain with the potential for localized flooding will affect
the following counties...

Washington...Dakota...Hennepin...Ramsey...

At 449 PM CDT...Additional thunderstorms were moving into the Twin
Cities metro area. These will bring the potential for an additional
inch or more of rain to locations that have already seen 1 to 3
inches of rain this afternoon. This could lead to flooding of urban
and poor drainage areas.

Locations impacted include...
Minneapolis, St. Paul, Bloomington, Eagan, Woodbury, Burnsville,
Apple Valley, Edina, Maplewood, Richfield, Cottage Grove and Inver
Grove Heights.

Excessive runoff from heavy rainfall will cause ponding of water in
urban areas, highways, streets and underpasses as well as other poor
drainage areas and low lying spots. Do not attempt to travel across
flooded roads. Find alternate routes. It takes only a few inches of
swiftly flowing water to carry vehicles away.

LAT...LON 4473 9333 4479 9333 4478 9338 4480 9340
      4482 9340 4489 9332 4499 9295 4494 9287
      4489 9289 4482 9301 4472 9323
TIME...MOT...LOC 2149Z 239DEG 0KT 4464 9342

Special weather statement, Sep 20, 5:21 PM CDT, 1 hour 2 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Twin Cities/Chanhassen MN
521 PM CDT THU SEP 20 2018

MNC019-053-123-202315-
Hennepin-Carver-Ramsey-
521 PM CDT THU SEP 20 2018

...URBAN AND SMALL STREAM FLOODING EXPECTED...

Thunderstorms with heavy rain will cause minor flooding in the
following counties...

Hennepin...Carver...Ramsey...

* Until 615 PM CDT.

* At 521 PM CDT, Doppler radar indicated heavy rain due to
  thunderstorms. This will cause urban and small stream flooding.
  Overflow of water will result in minor flooding of poor drainage
  locations in the area. Up to two inches of rain have already
  fallen.

* Some locations that will experience flooding include...
  Minneapolis, St. Paul, Bloomington, Brooklyn Park, Plymouth, Eden
  Prairie, Minnetonka, Edina, St. Louis Park, Maplewood, Roseville
  and Brooklyn Center.

Additional rainfall of around an inch is expected over the area
through 6 PM. This additional rain will result in minor flooding.

This includes the following streams and drainages...Battle Creek...
Bass Creek...South Fork Ninemile Creek...Riley Creek...Ryan Creek...
Bevens Creek...Carver Creek...Bassett Creek...Minnehaha Creek...
Chaska Creek...Bluff Creek...Mississippi River...Ninemile Creek...
Minnesota River and Purgatory Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 4473 9379 4479 9381 4497 9358 4507 9339
      4510 9328 4504 9328 4504 9323 4511 9322
      4510 9300 4505 9298 4498 9299 4489 9332
      4482 9340 4480 9357

Local storm report, Sep 20, 5:43 PM CDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
543 PM CDT THU SEP 20 2018

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

0538 PM     TSTM WND DMG     CEYLON                  43.53N 94.63W
09/20/2018                   MARTIN             MN   LAW ENFORCEMENT

            NUMEROUS TREES DOWN.

&&

TDK

Local storm report, Sep 20, 5:50 PM CDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
550 PM CDT THU SEP 20 2018

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

0544 PM     TSTM WND DMG     WELCOME                 43.67N 94.62W
09/20/2018                   MARTIN             MN   STORM CHASER

            NUMEROUS LARGE BRANCHES DOWN.

&&

TDK

Special weather statement, Sep 20, 5:51 PM CDT, 32 minutes before

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
551 PM CDT THU SEP 20 2018

MNZ060-066>069-075-076-083-202315-
Le Sueur-Blue Earth-Hennepin-McLeod-Carver-Sibley-Scott-Nicollet-
551 PM CDT THU SEP 20 2018

...A LINE OF STORMS WILL AFFECT SOUTHWESTERN HENNEPIN...LE SUEUR...
EASTERN SIBLEY...WESTERN SCOTT...NORTHEASTERN MCLEOD...NORTHERN BLUE
EARTH...CARVER AND EASTERN NICOLLET COUNTIES...

At 550 PM CDT, radar indicated strong thunderstorms were located
along a line extending from near Silver Lake to near New Sweden to
near Lake Crystal. Movement was northeast at 65 mph.

Wind gusts of 50 to 55 mph and half inch hail are possible with these
storms.

Locations impacted include...
Mankato, Chaska, Chanhassen, North Mankato, St. Peter, Waconia,
Mound, Orono, Victoria, Belle Plaine, Minnetrista and Glencoe.

This includes the following highways...
 U.S. Highway 14 between mile markers 116 and 134.
 U.S. Highway 169 between mile markers 45 and 84.
 U.S. Highway 212 between mile markers 116 and 126.

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

These storms 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 4405 9426 4493 9422 4500 9360 4472 9361
      4429 9366
TIME...MOT...LOC 2250Z 237DEG 56KT 4492 9412 4449 9413 4412 9416

JLT

Local storm report, Sep 20, 6:05 PM CDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
605 PM CDT THU SEP 20 2018

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

0605 PM     TSTM WND DMG     FAIRMONT                43.65N 94.46W
09/20/2018                   MARTIN             MN   TRAINED SPOTTER

            TREE DOWN.

&&

TDK

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 20, 12:13 PM CDT	Special Weather Statement	MPX	Brown, Nicollet	32 min
Sep 20, 12:53 PM CDT	Special Weather Statement	MPX	Brown	37 min
Sep 20, 1:33 PM CDT	Special Weather Statement	MPX	Le Sueur, Scott	42 min
Sep 20, 1:49 PM CDT	Special Weather Statement	MPX	Dakota	26 min
Sep 20, 2:07 PM CDT	Special Weather Statement	MPX	Rice, Washington	38 min
Sep 20, 2:31 PM CDT	Special Weather Statement	MPX	Ramsey	119 min
Sep 20, 2:46 PM CDT	River Flood Warning	MPX	Redwood	9 days
Sep 20, 3:00 PM CDT	Special Weather Statement	MPX	Yellow Medicine	30 min
Sep 20, 3:24 PM CDT	Special Weather Statement	MPX	Renville	36 min
Sep 20, 4:50 PM CDT	Special Weather Statement	MPX	Ramsey	85 min
Sep 20, 5:21 PM CDT	Special Weather Statement	MPX	Hennepin, Ramsey	54 min
Sep 20, 5:30 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Martin, Watonwan	45 min
Sep 20, 5:51 PM CDT	Special Weather Statement	MPX	Carver, Le Sueur, Nicollet, Sibley	24 min
Sep 20, 5:54 PM CDT	Areal Flood Warning	MPX	Anoka, Carver, Dakota, Hennepin, Ramsey, Scott and 2 more	3 hr
Sep 20, 5:59 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Waseca	46 min
Sep 20, 6:13 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Dakota, Hennepin, Ramsey, Scott	47 min
Sep 20, 6:15 PM CDT	Severe Thunderstorm Warning	MPX	Carver	15 min
Sep 20, 6:19 PM CDT	Tornado Warning	MPX	Le Sueur, Rice, Waseca	41 min
Sep 20, 6:40 PM CDT	Tornado Warning	MPX	Goodhue, Rice, Steele	35 min
Sep 20, 6:41 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Dakota, Goodhue, Hennepin, Ramsey, Washington	34 min
Sep 20, 6:49 PM CDT	Tornado Warning Tornado observed	MPX	Dakota, Goodhue, Rice	41 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2018 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.