Alert archive / North Dakota / Special Weather Statements in 2017

Special Weather Statement, NWS Bismarck, ND

July 5, 2017Sioux County, North Dakota

NWS Bismarck, ND issued this special weather statement at Jul 5, 2017, 5:57 PM CDT for Sioux County, North Dakota. It was in force for 33 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 5, 2017, 5:57 PM CDT (22:57 UTC)
Expired: Jul 5, 2017, 6:30 PM CDT
In force: 33 min
Issued by: NWS Bismarck, ND

County Sioux County, ND

The radar

The Bismarck radar (KBIS), 62 km from the middle of the area, began a volume at 22:57 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 nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.0 hours before the alert went out and 64 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: 283 J/kg
Mixed-layer CIN: -426 J/kg
Mixed-layer LCL: 1791 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 242 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

942 
WWUS83 KBIS 052257
SPSBIS

Special Weather Statement
National Weather Service Bismarck ND
557 PM CDT WED JUL 5 2017
 
NDZ042-045-052330-
Grant ND-Sioux ND-
557 PM CDT WED JUL 5 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT EASTERN SIOUX AND
SOUTHEASTERN GRANT COUNTIES UNTIL 630 PM CDT/530 PM MDT/...

At 556 PM CDT/456 PM MDT/, Doppler radar was tracking strong
thunderstorms along a line extending from 6 miles south of Flasher to
near Watauga. Movement was east at 35 mph.

Nickel size hail and wind gusts to 50 mph will be possible with these
storms.

Locations impacted include...
Selfridge, Shields, Raleigh, St. Gertrude and Porcupine. 

LAT...LON 4639 10142 4635 10105 4628 10105 4630 10100
      4632 10101 4631 10099 4634 10096 4632 10075
      4594 10088 4595 10163
TIME...MOT...LOC 2256Z 276DEG 28KT 4636 10123 4595 10149 

$$

SIMOSKO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 7:14 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder	49 min
Jul 4, 8:37 PM CDT	Special Weather Statement	BIS	Stutsman	38 min
Jul 5, 3:23 PM CDT	Special Weather Statement	BIS	Stark	52 min
Jul 5, 3:53 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger, Stark	67 min
Jul 5, 4:20 PM CDT	Special Weather Statement	BIS	Adams	55 min
Jul 5, 4:40 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger, Morton, Sioux	65 min
Jul 5, 5:47 PM CDT	Special Weather Statement	BIS	Sioux	43 min
Jul 5, 6:31 PM CDT	Special Weather Statement	BIS	Emmons	44 min
Jul 5, 6:40 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, McIntosh	38 min

Nearby

Special Weather Statements in North Dakota, 2017 Every special weather statement in 2017

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.