Alert archive / Minnesota / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 116, NWS Twin Cities, MN

August 10, 2020Goodhue County, Rice County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 10, 2020, 5:27 AM CDT for Goodhue County, Rice County, Minnesota. It was in force for 17 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 10, 2020, 5:27 AM CDT (10:27 UTC)
Expired: Aug 10, 2020, 5:44 AM CDT
In force: 17 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Goodhue County, MN, Rice County, MN

The radar

The Minneapolis radar (KMPX), 80 km from the middle of the area, began a volume at 10:27 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 10.5 hours before the alert went out and 82 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: 2342 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 1184 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 10.5

Open this sounding in Storm Lab

The text

As transmitted.

317 
WUUS53 KMPX 101027
SVRMPX
MNC049-131-101100-
/O.NEW.KMPX.SV.W.0116.200810T1027Z-200810T1100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
527 AM CDT Mon Aug 10 2020

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southwestern Goodhue County in southeastern Minnesota...
  Southeastern Rice County in south central Minnesota...

* Until 600 AM CDT.

* At 526 AM CDT, a severe thunderstorm was located 7 miles southwest
  of Kenyon, or 10 miles northeast of Owatonna, moving east at 35
  mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  Kenyon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

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

&&

LAT...LON 4425 9320 4429 9281 4420 9282 4419 9303
      4420 9321
TIME...MOT...LOC 1026Z 270DEG 32KT 4418 9306 

HAIL...1.50IN
WIND...60MPH
 
$$

CEO

2 follow-up statements

632 
WWUS53 KMPX 101037
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
537 AM CDT Mon Aug 10 2020

MNC131-101046-
/O.CAN.KMPX.SV.W.0116.000000T0000Z-200810T1100Z/
Rice MN-
537 AM CDT Mon Aug 10 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN RICE COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4419 9304 4427 9304 4429 9281 4420 9282
      4419 9303
TIME...MOT...LOC 1036Z 270DEG 32KT 4418 9293 

$$

MNC049-101100-
/O.CON.KMPX.SV.W.0116.000000T0000Z-200810T1100Z/
Goodhue MN-
537 AM CDT Mon Aug 10 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 AM CDT
FOR SOUTHWESTERN GOODHUE COUNTY...

At 536 AM CDT, a severe thunderstorm was located over West Concord,
or 11 miles north of Dodge Center, moving east at 35 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Kenyon and Bombay. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

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

&&

LAT...LON 4419 9304 4427 9304 4429 9281 4420 9282
      4419 9303
TIME...MOT...LOC 1036Z 270DEG 32KT 4418 9293 

HAIL...1.50IN
WIND...60MPH
 
$$

CEO

907 
WWUS53 KMPX 101044
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
544 AM CDT Mon Aug 10 2020

MNC049-101053-
/O.CAN.KMPX.SV.W.0116.000000T0000Z-200810T1100Z/
Goodhue MN-
544 AM CDT Mon Aug 10 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN GOODHUE COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 4419 9304 4427 9304 4429 9281 4420 9282
      4419 9303
TIME...MOT...LOC 1040Z 270DEG 32KT 4418 9283 

$$

CEO

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 Aug 10, 3:49 AM CDT, 1 hour 38 minutes earlier.

Area forecast discussion, Aug 10, 3:49 AM CDT, 1 hour 38 minutes before

Area Forecast Discussion
National Weather Service Twin Cities/Chanhassen MN
349 AM CDT Mon Aug 10 2020

.SHORT TERM...(Today through Tuesday)
Issued at 349 AM CDT Mon Aug 10 2020

Large hail, heavy rainfall, and wind-producing storms that formed
ahead of an approaching cold front (and provided an impressive
lightning show for parts of the area Sunday night) will continue
to develop east/southeast early this morning, riding along the
instability gradient along the MN/WI border. By mid-morning the
severe threat will have diminished, but a few showers could
persist along the Iowa border. Drier air works into the area this
afternoon bringing clearing skies, and reducing dewpoints into the
40s and 50s. High temperatures today will be a few degrees cooler
than climatological normals, with highs in the 75-80 degree
range. Lows tonight will be pleasant in the low to mid 50s. Dry
weather continues on Tuesday as weak ridging influences the local
weather, although temperatures will moderate several degrees with
highs in the low to mid 80s.

.LONG TERM...(Tuesday night through Sunday)
Issued at 349 AM CDT Mon Aug 10 2020

Semi-zonal flow prevails through much of next week, with
precipitation opportunities supplied by ripples of shortwave
energy in the fast-moving westerly flow. The first of these
chances for showers and thunderstorms arrives Wednesday as return
flow ensues, and then chances persist through the weekend as
western troughing shifts into the north central CONUS.
Temperatures will be near to slightly above normal through the
period.

&&

.AVIATION...(For the 06Z TAFS through 06Z Monday night)
Issued at 1234 AM CDT Mon Aug 10 2020

VFR conditions for most locations overnight as a cold front pushes
through the region. This cold front could produce some MVFR
ceilings, and spark a few thunderstorms. As of now, the majority
of the thunder activity will be at KMSP.

KMSP...
Thunderstorms will continue through at least the next couple of
hours at KMSP. A few could produce some hail. Eventually a cold
front will move through the region and push these storms east.
Expect northwest winds and VFR conditions once the storm passes.

/OUTLOOK FOR KMSP/
TUE...VFR. Wind SW at 5-10 kt.
WED...VFR. Wind SE at 10 kt.
THU...VFR with MVFR/TSRA possible. Wind SE at 10G20 kt.

&&

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

SHORT TERM...LS
LONG TERM...LS
AVIATION...JRB

Hazardous weather outlook, Aug 10, 4:24 AM CDT, 1 hour 3 minutes before

Hazardous Weather Outlook
National Weather Service Twin Cities/Chanhassen MN
424 AM CDT Mon Aug 10 2020

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
110930-
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-
424 AM CDT Mon Aug 10 2020

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

.DAY ONE...Today and Tonight.

Scattered thunderstorms producing large hail, strong winds, and
heavy rainfall will remain possible across east and south central
Minnesota and west central Wisconsin this morning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Periodic thunderstorms are possible Wednesday through Saturday.
Severe storms are not expected at this time.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotter activation may be needed this morning across east
and south central Minnesota and west central Wisconsin.

In the hours before

Local storm report, Aug 10, 4:02 AM CDT, 1 hour 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
402 AM CDT MON AUG 10 2020

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

0341 AM     HAIL             1 W ROBBINSDALE         45.03N 93.35W
08/10/2020  M1.00 INCH       HENNEPIN           MN   PUBLIC

&&

LS

Local storm report, Aug 10, 4:21 AM CDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
421 AM CDT MON AUG 10 2020

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

0340 AM     HAIL             1 ESE NORTHFIELD        44.45N 93.15W
08/10/2020  E1.00 INCH       RICE               MN   EMERGENCY MNGR

            PEA TO QUARTER SIZE HAIL LASTING 2 MINUTES.

&&

LS

Local storm report, Aug 10, 4:28 AM CDT, 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
428 AM CDT MON AUG 10 2020

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

0135 AM     TSTM WND DMG     3 NW BLOOMINGTON        44.85N 93.35W
08/10/2020                   HENNEPIN           MN   BROADCAST MEDIA

            TREE UPROOTED AND PARTIALLY COVERING THE
            ROAD NEAR THE INTERSECTION OF W 84TH ST AND
            STANLEY AVE S.

&&

Local storm report, Aug 10, 4:46 AM CDT, 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
446 AM CDT MON AUG 10 2020

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

0346 AM     HAIL             3 W ORROCK              45.45N 93.79W
08/10/2020  M1.00 INCH       SHERBURNE          MN   PUBLIC

&&

Local storm report, Aug 10, 5:07 AM CDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
507 AM CDT MON AUG 10 2020

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

0506 AM     HAIL             5 S LEMOND              43.91N 93.39W
08/10/2020  M1.00 INCH       STEELE             MN   TRAINED SPOTTER

&&

Special weather statement, Aug 10, 5:21 AM CDT, 6 minutes before

Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
521 AM CDT Mon Aug 10 2020

WIZ016-101115-
Rusk-
521 AM CDT Mon Aug 10 2020

...A STRONG THUNDERSTORMS WILL AFFECT RUSK COUNTY...

At 519 AM CDT, a strong thunderstorms were located 3 miles south of
Bruce and 4 miles north of Ladysmith, moving east at 40 mph.

Wind gusts up to 50 mph and nickel size hail are possible with these
storms.

Locations impacted include...
Ladysmith, Bruce, Hawkins, Weyerhaeuser, Sheldon, Tony, Conrath, Glen
Flora, Ingram and Rusk County Airport.

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

LAT...LON 4538 9092 4530 9093 4529 9095 4529 9135
      4548 9146 4565 9113 4563 9067 4538 9068
TIME...MOT...LOC 1019Z 249DEG 33KT 4539 9122

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 7:52 PM CDT	Special Weather Statement	MPX	Hennepin	23 min
Aug 9, 8:13 PM CDT	Special Weather Statement	MPX	Hennepin	47 min
Aug 9, 8:47 PM CDT	Special Weather Statement	MPX	Scott	88 min
Aug 9, 9:00 PM CDT	Special Weather Statement	MPX	Scott	30 min
Aug 9, 9:21 PM CDT	Special Weather Statement	MPX	Carver	54 min
Aug 9, 9:30 PM CDT	Severe Thunderstorm Warning	MPX	Carver	45 min
Aug 9, 9:39 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin, Scott	51 min
Aug 9, 10:14 PM CDT	Special Weather Statement	MPX	Hennepin	46 min
Aug 9, 10:27 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin, Sherburne, Wright	48 min
Aug 9, 10:27 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Hennepin, Scott	27 min
Aug 9, 10:48 PM CDT	Severe Thunderstorm Warning	MPX	Wright	57 min
Aug 9, 11:16 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin	44 min
Aug 9, 11:40 PM CDT	Severe Thunderstorm Warning	MPX	Wright	50 min
Aug 9, 11:56 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin	49 min
Aug 10, 12:28 AM CDT	Severe Thunderstorm Warning	MPX	Wright	32 min
Aug 10, 12:41 AM CDT	Severe Thunderstorm Warning	MPX	Hennepin	49 min
Aug 10, 12:42 AM CDT	Special Weather Statement	MPX	Hennepin	63 min
Aug 10, 12:54 AM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin	51 min
Aug 10, 1:21 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Hennepin, Scott	39 min
Aug 10, 1:29 AM CDT	Special Weather Statement	MPX	Hennepin	61 min
Aug 10, 1:48 AM CDT	Flash Flood Warning	MPX	Carver, Hennepin, Scott	4 hr
Aug 10, 1:57 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Hennepin, Washington	48 min
Aug 10, 2:04 AM CDT	Severe Thunderstorm Warning	MPX	Meeker, Wright	26 min
Aug 10, 2:08 AM CDT	Severe Thunderstorm Warning	MPX	Rice, Scott	37 min
Aug 10, 2:20 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Scott	40 min
Aug 10, 2:31 AM CDT	Severe Thunderstorm Warning	MPX	Wright	44 min
Aug 10, 2:41 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Rice, Scott	49 min
Aug 10, 2:43 AM CDT	Severe Thunderstorm Warning	MPX	Carver, Scott	32 min
Aug 10, 3:06 AM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin	54 min
Aug 10, 3:15 AM CDT	Severe Thunderstorm Warning	MPX	Kanabec, Mille Lacs	45 min
Aug 10, 3:29 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Rice	46 min
Aug 10, 3:34 AM CDT	Special Weather Statement	MPX	Sherburne	56 min
Aug 10, 3:46 AM CDT	Severe Thunderstorm Warning	MPX	Rice	44 min
Aug 10, 3:58 AM CDT	Special Weather Statement	MPX	Dakota	32 min
Aug 10, 4:10 AM CDT	Severe Thunderstorm Warning	MPX	Goodhue, Rice	50 min
Aug 10, 4:16 AM CDT	Severe Thunderstorm Warning	MPX	Steele, Waseca	59 min
Aug 10, 5:08 AM CDT	Severe Thunderstorm Warning	MPX	Freeborn, Steele, Waseca	22 min
Aug 10, 7:44 AM CDT	Special Weather Statement	MPX	Blue Earth	31 min
Aug 10, 8:03 AM CDT	Special Weather Statement	MPX	Waseca	27 min
Aug 10, 8:10 AM CDT	Severe Thunderstorm Warning	MPX	Waseca	35 min
Aug 10, 8:36 AM CDT	Severe Thunderstorm Warning	MPX	Freeborn, Steele	28 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2020 Every severe thunderstorm warning 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.