Alert archive / North Dakota / Special Weather Statements in 2021
Special Weather Statement, NWS Bismarck, ND
NWS Bismarck, ND issued this special weather statement at Aug 7, 2021, 1:31 AM MDT for Billings County, North Dakota. It was in force for 44 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 7, 2021, 1:31 AM MDT (07:31 UTC)
- Expired
- Aug 7, 2021, 2:15 AM MDT
- In force
- 44 min
- Issued by
- NWS Bismarck, ND
- Hail
- 0.75 in
- Wind
- 40
County Billings County, ND
The radar
The Bismarck radar (KBIS), 181 km from the middle of the area, began a volume at 07:33 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, 7.5 hours before the alert went out and 186 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.
- Mixed-layer CAPE
- 14 J/kg
- Mixed-layer CIN
- -145 J/kg
- Mixed-layer LCL
- 1900 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
511
WWUS83 KBIS 070731
SPSBIS
Special Weather Statement
National Weather Service Bismarck ND
131 AM MDT Sat Aug 7 2021
NDZ018-032-033-070815-
Stark ND-Billings ND-Dunn ND-
131 AM MDT Sat Aug 7 2021
...Strong thunderstorms will impact portions of southwestern Dunn,
central Billings and northwestern Stark Counties through 215 AM
MDT...
At 130 AM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles northeast of Belfield to 8 miles
northeast of Medora. Movement was northeast at 10 mph.
HAZARD...Winds in excess of 40 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Strong thunderstorms will be near...
Belfield around 135 AM MDT.
Other locations in the path of these storms include South Fairfield.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4713 10276 4720 10334 4698 10361 4686 10307
TIME...MOT...LOC 0730Z 244DEG 10KT 4697 10313 4701 10342
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH
$$
MJONESThe office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 4:23 AM MDT | Special Weather Statement | BIS | Stark | 52 min |
| Aug 7, 5:46 AM MDT | Special Weather Statement | BIS | Hettinger | 44 min |
| Aug 7, 7:55 AM MDT | Special Weather Statement | BIS | Adams | 35 min |
| Aug 7, 8:25 AM MDT | Special Weather Statement | BIS | Grant | 35 min |
| Aug 7, 1:53 PM MDT | Areal Flood Advisory | BIS | Grant, Morton, Sioux | 3 hr |
| Aug 7, 3:11 PM MDT | Flash Flood Warning | BIS | Sioux | 3 hr |
| Aug 7, 5:42 PM MDT | Special Weather Statement | BIS | Dickey | 33 min |
Nearby
Special Weather Statements in North Dakota, 2021Every special weather statement in 2021
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.