Alert archive / North Dakota / Special Weather Statements in 2018

Special Weather Statement, NWS Bismarck, ND

August 5, 2018McKenzie County, North Dakota

NWS Bismarck, ND issued this special weather statement at Aug 5, 2018, 9:06 PM CDT for McKenzie County, North Dakota. It was in force for 24 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 5, 2018, 9:06 PM CDT (02:06 UTC)
Expired: Aug 5, 2018, 9:30 PM CDT
In force: 24 min
Issued by: NWS Bismarck, ND

County McKenzie County, ND

The radar

The Glasgow radar (KGGW), 201 km from the middle of the area, began a volume at 02:06 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 nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.1 hours before the alert went out and 281 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: 171 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1947 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Bismarck, ND wrote its last area forecast discussion before this special weather statement went out at Aug 5, 7:11 PM CDT, 1 hour 55 minutes earlier.

Area forecast discussion, Aug 5, 7:11 PM CDT, 1 hour 55 minutes before

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Hazardous weather outlook, Aug 5, 6:41 PM CDT, 2 hours 25 minutes before

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In the hours before

Special weather statement, Aug 5, 9:06 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Bismarck ND
906 PM CDT SUN AUG 5 2018

NDZ009-017-060230-
McKenzie ND-Williams ND-
906 PM CDT SUN AUG 5 2018

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT NORTHWESTERN MCKENZIE
AND SOUTHWESTERN WILLIAMS COUNTIES UNTIL 930 PM CDT/830 PM MDT/...

At 906 PM CDT/806 PM MDT/, strong thunderstorms were clustered near
Fort Union Trading Post, or 17 miles north of Sidney, moving
southeast at 15 mph.

Half inch hail and wind gusts to 40 mph will be possible with these
storms.

Locations impacted include...
Fairview, Fort Union Trading Post, East Fairview, Trenton, Cartwright
and Fort Buford State Historical Site.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek shelter
inside a building or vehicle.

&&

LAT...LON 4816 10405 4818 10401 4811 10346 4767 10404
TIME...MOT...LOC 0206Z 322DEG 15KT 4797 10413

HARGROVE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 9:15 PM CDT	Special Weather Statement	BIS	McKenzie	30 min
Aug 5, 9:28 PM CDT	Special Weather Statement	BIS	McKenzie	47 min
Aug 5, 10:20 PM CDT	Special Weather Statement	BIS	McKenzie	40 min
Aug 5, 11:02 PM CDT	Special Weather Statement	BIS	Dunn	43 min
Aug 6, 9:36 AM CDT	Special Weather Statement	BIS	Stutsman	39 min
Aug 6, 10:18 AM CDT	Special Weather Statement	BIS	Stutsman	42 min
Aug 6, 5:55 PM CDT	Special Weather Statement	BIS	Logan	50 min
Aug 6, 6:42 PM CDT	Special Weather Statement	BIS	Logan	48 min

Nearby

Special Weather Statements in North Dakota, 2018 Every special weather statement in 2018

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.