Alert archive / Minnesota / Tornado Warnings in 2020

Tornado Warning 9, NWS Twin Cities, MN

June 29, 2020Sibley County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jun 29, 2020, 12:21 AM CDT for Sibley County, Minnesota. It was in force for 39 min. 1 report 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
Jun 29, 2020, 12:21 AM CDT (05:21 UTC)
Expired
Jun 29, 2020, 1:00 AM CDT
In force
39 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

County Sibley County, MN

The radar

The Minneapolis radar (KMPX), 79 km from the middle of the area, began a volume at 05:22 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

TimeReportWhereRemark
Jun 29, 12:40 AM CDTHAIL 0.7Winthrop, MN

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

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 5.4 hours before the alert went out and 76 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 2020-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 40 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 2020-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 146 square meters per square second.1939Sfc1 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
40 J/kg
Mixed-layer CIN
-71 J/kg
Mixed-layer LCL
944 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
146 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

916 
WFUS53 KMPX 290521
TORMPX
MNC143-290600-
/O.NEW.KMPX.TO.W.0009.200629T0521Z-200629T0600Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Twin Cities/Chanhassen MN
1221 AM CDT Mon Jun 29 2020

The National Weather Service in The Twin Cities has issued a

* Tornado Warning for...
  Southwestern Sibley County in central Minnesota...

* Until 100 AM CDT.
    
* At 1221 AM CDT, a severe thunderstorm capable of producing a
  tornado was located near Gibbon, or 11 miles north of New Ulm,
  moving northeast at 10 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Winthrop around 100 AM CDT.

Other locations impacted by this tornadic thunderstorm include New
Sweden.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4453 9463 4463 9447 4463 9422 4446 9420
      4446 9463
TIME...MOT...LOC 0521Z 235DEG 9KT 4448 9449 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

JRB
3 follow-up statements
556 
WWUS53 KMPX 290537
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1237 AM CDT Mon Jun 29 2020

MNC143-290600-
/O.CON.KMPX.TO.W.0009.000000T0000Z-200629T0600Z/
Sibley MN-
1237 AM CDT Mon Jun 29 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 100 AM CDT FOR
SOUTHWESTERN SIBLEY COUNTY...
    
At 1237 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Lafayette, or 13 miles north of New Ulm, moving east
at 15 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Winthrop around 1245 AM CDT.
  Gaylord around 100 AM CDT.

Other locations impacted by this tornadic thunderstorm include New
Sweden.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4453 9456 4463 9440 4463 9422 4446 9420
      4446 9457
TIME...MOT...LOC 0537Z 248DEG 11KT 4448 9437 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

JRB
935 
WWUS53 KMPX 290550
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1250 AM CDT Mon Jun 29 2020

MNC143-290600-
/O.CON.KMPX.TO.W.0009.000000T0000Z-200629T0600Z/
Sibley MN-
1250 AM CDT Mon Jun 29 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 100 AM CDT FOR
SOUTHWESTERN SIBLEY COUNTY...
    
At 1250 AM CDT, a severe thunderstorm capable of producing a tornado
was located near Winthrop, or 14 miles northeast of New Ulm, moving
northeast at 10 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Gaylord around 115 AM CDT.

Other locations impacted by this tornadic thunderstorm include New
Sweden.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4453 9449 4463 9432 4463 9422 4446 9420
      4446 9452
TIME...MOT...LOC 0550Z 235DEG 9KT 4450 9433 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

JRB
159 
WWUS53 KMPX 290601
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
101 AM CDT Mon Jun 29 2020

MNC143-290611-
/O.EXP.KMPX.TO.W.0009.000000T0000Z-200629T0600Z/
Sibley MN-
101 AM CDT Mon Jun 29 2020

...THE TORNADO WARNING FOR SOUTHWESTERN SIBLEY COUNTY HAS EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been allowed to expire.  However heavy
rain is still ongoing with this thunderstorm.

LAT...LON 4453 9449 4463 9432 4463 9422 4446 9420
      4446 9452
TIME...MOT...LOC 0601Z 235DEG 9KT 4451 9431 

$$

JRB

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 7:06 PM CDTTornado WarningMPXGoodhue24 min
Jun 28, 7:14 PM CDTSpecial Weather StatementMPXDakota31 min
Jun 28, 7:25 PM CDTSpecial Weather StatementMPXWashington35 min
Jun 28, 7:46 PM CDTSpecial Weather StatementMPXDakota29 min
Jun 28, 10:27 PM CDTSpecial Weather StatementMPXWashington2 hr
Jun 28, 10:52 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Nicollet23 min
Jun 28, 11:15 PM CDTSpecial Weather StatementMPXNicollet45 min
Jun 28, 11:30 PM CDTSevere Thunderstorm WarningMPXNicollet, Sibley30 min
Jun 29, 12:01 AM CDTSpecial Weather StatementMPXSibley29 min
Jun 29, 12:46 AM CDTSpecial Weather StatementMPXRenville, Sibley59 min
Jun 29, 1:19 AM CDTFlash Flood WarningMPXMcLeod, Renville, Sibley3 hr
Jun 29, 1:31 AM CDTFlash Flood WatchMPXAnoka, Blue Earth, Brown, Carver, Chisago, Dakota and 19 more10 hr
Jun 29, 1:45 AM CDTSpecial Weather StatementMPXChippewa60 min
Jun 29, 2:42 AM CDTSpecial Weather StatementMPXCarver, Scott48 min
Jun 29, 3:03 AM CDTSpecial Weather StatementMPXDakota, Le Sueur, Rice57 min
Jun 29, 4:27 AM CDTHeat AdvisoryMPXAnoka, Carver, Chippewa, Dakota, Hennepin, Lac qui Parle and 6 more8 hr
Jun 29, 4:29 AM CDTSpecial Weather StatementMPXLe Sueur, Nicollet, Scott, Sibley46 min
Jun 29, 4:33 AM CDTSpecial Weather StatementMPXDakota, Goodhue, Rice, Washington57 min
Jun 29, 5:49 AM CDTSpecial Weather StatementMPXPope, Swift56 min
Jun 29, 6:46 AM CDTSpecial Weather StatementMPXChippewa, Kandiyohi59 min
Jun 29, 7:18 AM CDTSpecial Weather StatementMPXLe Sueur57 min
Jun 29, 7:23 AM CDTFlash Flood WarningMPXBlue Earth, Brown, Le Sueur, Nicollet5 hr
Jun 29, 8:17 AM CDTSpecial Weather StatementMPXWright43 min
Jun 29, 8:33 AM CDTFlash Flood WarningMPXLe Sueur, Rice3 hr
Jun 29, 8:34 AM CDTSpecial Weather StatementMPXLe Sueur, Rice26 min
Jun 29, 9:18 AM CDTSpecial Weather StatementMPXNicollet, Sibley57 min
Jun 29, 11:40 AM CDTAreal Flood WarningMPXLe Sueur, Rice4 hr
Jun 29, 3:57 PM CDTSpecial Weather StatementMPXMille Lacs63 min
Jun 29, 4:27 PM CDTSpecial Weather StatementMPXTodd33 min
Jun 29, 5:02 PM CDTSpecial Weather StatementMPXMorrison, Todd58 min
Jun 29, 6:04 PM CDTSpecial Weather StatementMPXMorrison71 min
Jun 29, 6:42 PM CDTFlash Flood WarningMPXMorrison5 hr

Nearby

Tornado Warnings in Minnesota, 2020Every tornado warning in 2020Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.