Alert archive / Minnesota / Tornado Warnings in 2019

Tornado Warning 26, NWS Twin Cities, MN

July 18, 2019Martin County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jul 18, 2019, 6:35 PM CDT for Martin County, Minnesota. It was in force for 25 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
Jul 18, 2019, 6:35 PM CDT (23:35 UTC)
Expired
Jul 18, 2019, 7:00 PM CDT
In force
25 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.75 in

County Martin County, MN

The radar

The Minneapolis radar (KMPX), 142 km from the middle of the area, began a volume at 23:38 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 watch it was issued in

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

IssuedProductOfficeLasted
Jul 18, 5:30 PM CDTTornado WatchSPC4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.6 hours before the alert went out and 141 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 12:00Z on 2019-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 686 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2019-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.19395878Sfc1 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
686 J/kg
Mixed-layer CIN
-120 J/kg
Mixed-layer LCL
845 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
54 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted.

303 
WFUS53 KMPX 182335
TORMPX
MNC091-190000-
/O.NEW.KMPX.TO.W.0026.190718T2335Z-190719T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Twin Cities/Chanhassen MN
635 PM CDT Thu Jul 18 2019

The National Weather Service in The Twin Cities has issued a

* Tornado Warning for...
  Northeastern Martin County in south central Minnesota...

* Until 700 PM CDT.
    
* At 635 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles southwest of Truman, or 10 miles northwest of
  Fairmont, moving east at 20 mph.

  HAZARD...Tornado and golf ball 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...
  Truman around 655 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Northrop and Foxlake.

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 4379 9471 4385 9449 4385 9443 4372 9433
      4371 9467
TIME...MOT...LOC 2335Z 253DEG 17KT 4377 9455 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

ETA
1 follow-up statement
692 
WWUS53 KMPX 182347
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
647 PM CDT Thu Jul 18 2019

MNC091-190000-
/O.CON.KMPX.TO.W.0026.000000T0000Z-190719T0000Z/
Martin MN-
647 PM CDT Thu Jul 18 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
NORTHEASTERN MARTIN COUNTY...
    
At 646 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Truman, or 10 miles north of Fairmont, moving east
at 20 mph.

HAZARD...Tornado and golf ball 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...
  Truman around 655 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Northrop.

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 4380 9462 4383 9448 4384 9442 4372 9433
      4371 9462
TIME...MOT...LOC 2346Z 253DEG 17KT 4379 9448 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

ETA

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 2:04 AM CDTSpecial Weather StatementMPXFaribault41 min
Jul 18, 3:31 AM CDTSpecial Weather StatementMPXLe Sueur29 min
Jul 18, 4:11 AM CDTSpecial Weather StatementMPXDakota, Scott34 min
Jul 18, 4:18 AM CDTSpecial Weather StatementMPXPope, Stevens27 min
Jul 18, 4:28 AM CDTSevere Thunderstorm WarningMPXDakota, Scott17 min
Jul 18, 4:44 AM CDTSpecial Weather StatementMPXPope31 min
Jul 18, 4:50 AM CDTSevere Thunderstorm WarningMPXKandiyohi, Pope, Stearns, Swift25 min
Jul 18, 5:59 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Faribault, Waseca31 min
Jul 18, 6:37 PM CDTTornado WarningMPXWaseca23 min
Jul 18, 6:58 PM CDTTornado WarningMPXFaribault, Martin32 min

Nearby

Tornado Warnings in Minnesota, 2019Every tornado warning in 2019Tornadoes in 2019

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.