Alert archive / North Dakota / Tornado Warnings in 2019

Tornado Warning 13, NWS Bismarck, ND

July 17, 2019Sioux County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jul 17, 2019, 7:03 PM CDT for Sioux County, North Dakota. It was in force for 27 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 17, 2019, 7:03 PM CDT (00:03 UTC)
Expired: Jul 17, 2019, 7:30 PM CDT
In force: 27 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

County Sioux County, ND

The radar

The Bismarck radar (KBIS), 79 km from the middle of the area, began a volume at 00:06 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.

Issued	Product	Office	Lasted
Jul 17, 5:38 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.1 hours before the alert went out and 80 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: 281 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 1963 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

130 
WFUS53 KBIS 180003
TORBIS
NDC085-180030-
/O.NEW.KBIS.TO.W.0013.190718T0003Z-190718T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Bismarck ND
703 PM CDT Wed Jul 17 2019

The National Weather Service in Bismarck has issued a

* Tornado Warning for...
  Southeastern Sioux County in south central North Dakota...

* Until 730 PM CDT.
    
* At 702 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Selfridge, moving east at 25 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 tornadic thunderstorm will remain over mainly rural areas of
  southeastern Sioux County.

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 4615 10105 4613 10068 4594 10070 4595 10108
TIME...MOT...LOC 0002Z 279DEG 20KT 4605 10097 

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

$$

JP MARTIN

2 follow-up statements

689 
WWUS53 KBIS 180016
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
716 PM CDT Wed Jul 17 2019

NDC085-180030-
/O.CON.KBIS.TO.W.0013.000000T0000Z-190718T0030Z/
Sioux ND-
716 PM CDT Wed Jul 17 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
SOUTHEASTERN SIOUX COUNTY...
    
At 716 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Selfridge, moving east at 25 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 tornadic thunderstorm will remain over mainly rural areas of
southeastern Sioux County.

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 4614 10088 4613 10068 4594 10070 4595 10091
TIME...MOT...LOC 0016Z 279DEG 20KT 4604 10086 

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

$$

JP MARTIN

243 
WWUS53 KBIS 180033
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
733 PM CDT Wed Jul 17 2019

NDC085-180041-
/O.EXP.KBIS.TO.W.0013.000000T0000Z-190718T0030Z/
Sioux ND-
733 PM CDT Wed Jul 17 2019

...THE TORNADO WARNING FOR SOUTHEASTERN SIOUX COUNTY HAS EXPIRED...
    
The tornadic thunderstorm which prompted the warning has weakened. 
The tornado warning is expired.

A severe thunderstorm warning for large hail and high wind is in 
effect for southeast Sioux County and southwest Emmons County until 
815 PM CDT.

LAT...LON 4614 10088 4613 10068 4594 10070 4595 10091
TIME...MOT...LOC 0031Z 279DEG 20KT 4603 10075 

$$

JP MARTIN

The office that day

Everything else NWS Bismarck, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 17, 7:04 PM CDT	Tornado Warning	BIS	Stark	26 min
Jul 17, 7:20 PM CDT	Special Weather Statement	BIS	Bottineau	40 min
Jul 17, 7:30 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Sioux	32 min
Jul 17, 7:33 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	42 min
Jul 17, 7:34 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Stark	56 min
Jul 17, 8:14 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau, Rolette	19 min
Jul 17, 8:35 PM CDT	Special Weather Statement	BIS	Morton	25 min
Jul 17, 8:36 PM CDT	Special Weather Statement	BIS	Golden Valley	24 min
Jul 17, 9:13 PM CDT	Special Weather Statement	BIS	Morton	32 min
Jul 17, 9:14 PM CDT	Special Weather Statement	BIS	Billings	31 min
Jul 17, 9:21 PM CDT	Severe Thunderstorm Warning	BIS	Morton	39 min
Jul 17, 10:47 PM CDT	Special Weather Statement	BIS	Kidder	28 min
Jul 18, 12:07 AM CDT	Special Weather Statement	BIS	Burleigh	23 min
Jul 18, 1:29 AM CDT	Special Weather Statement	BIS	Emmons, Kidder, Logan	46 min
Jul 18, 2:02 AM CDT	Severe Thunderstorm Warning	BIS	Emmons, Sioux	58 min
Jul 18, 2:44 AM CDT	Special Weather Statement	BIS	LaMoure, Stutsman	46 min
Jul 18, 3:21 AM CDT	Special Weather Statement	BIS	Emmons	24 min
Jul 18, 3:30 AM CDT	Special Weather Statement	BIS	LaMoure	30 min
Jul 18, 3:40 AM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan	52 min

Nearby

Tornado Warnings in North Dakota, 2019 Every tornado warning in 2019 Tornadoes 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.