Alert archive / North Dakota / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 173, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Jul 10, 2020, 7:11 PM CDT for Emmons County, Sioux County, North Dakota. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 10, 2020, 7:11 PM CDT (00:11 UTC)
- Expired
- Jul 10, 2020, 8:00 PM CDT
- In force
- 49 min
- Issued by
- NWS Bismarck, ND
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 70.0 mph
Counties Emmons County, ND, Sioux County, ND
The radar
The Bismarck radar (KBIS), 64 km from the middle of the area, began a volume at 00:14 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 10, 2:08 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 0.2 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.
- Mixed-layer CAPE
- 678 J/kg
- Mixed-layer CIN
- -68 J/kg
- Mixed-layer LCL
- 1585 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 10, 6:11 PM CDT, 1 hour earlier.
Area forecast discussion, Jul 10, 6:11 PM CDT, 1 hour before
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</html>Hazardous weather outlook, Jul 10, 6:13 PM CDT, 58 minutes before
Hazardous Weather Outlook National Weather Service Bismarck ND 613 PM CDT Fri Jul 10 2020 NDZ031>034-040>046-112315- Golden Valley-Billings-Stark-Morton-Slope-Hettinger-Grant-Bowman- Adams-Sioux-Emmons- 613 PM CDT Fri Jul 10 2020 /513 PM MDT Fri Jul 10 2020/ This Hazardous Weather Outlook is for portions of south central North Dakota and southwest North Dakota. .DAY ONE...Tonight Thunderstorms are likely this evening. Some storms could be severe with hail up to two inches in diameter and damaging wind gusts up to 70 mph. .DAYS TWO THROUGH SEVEN...Saturday through Thursday The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report severe weather to NWS Bismarck by calling 1-800-247-0212, relaying reports through law enforcement, or by reaching out via social media. NDZ001>003-009>011-017>021-035-036-047-050-112315- Divide-Burke-Renville-Williams-Mountrail-Ward-McKenzie-Dunn- Mercer-Oliver-McLean-Burleigh-Kidder-Logan-McIntosh- 613 PM CDT Fri Jul 10 2020 /513 PM MDT Fri Jul 10 2020/ This Hazardous Weather Outlook is for portions of north central North Dakota, northwest North Dakota, south central North Dakota, southeast North Dakota, and southwest North Dakota. .DAY ONE...Tonight Thunderstorms are expected this evening. Some storms could be severe with winds up to 70 mph and half dollar sized hail. .DAYS TWO THROUGH SEVEN...Saturday through Thursday The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report severe weather to NWS Bismarck by calling 1-800-247-0212, relaying reports through law enforcement, or by reaching out via social media. NDZ004-005-012-013-022-023-025-037-048-051-112315- Bottineau-Rolette-McHenry-Pierce-Sheridan-Wells-Foster-Stutsman- La Moure-Dickey- 613 PM CDT Fri Jul 10 2020 This Hazardous Weather Outlook is for portions of north central North Dakota, south central North Dakota, and southeast North Dakota. .DAY ONE...Tonight Thunderstorms are possible tonight. The threat for severe weather is low at this time. .DAYS TWO THROUGH SEVEN...Saturday through Thursday The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
In the hours before
Special weather statement, Jul 10, 5:45 PM CDT, 1 hour 26 minutes before
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</html>Local storm report, Jul 10, 6:44 PM CDT, 27 minutes before
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</html>Special weather statement, Jul 10, 6:50 PM CDT, 21 minutes before
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</html>Special weather statement, Jul 10, 7:00 PM CDT, 11 minutes before
Special Weather Statement
National Weather Service Bismarck ND
700 PM CDT Fri Jul 10 2020
NDZ001-009-110045-
Divide ND-Williams ND-
700 PM CDT Fri Jul 10 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN WILLIAMS AND DIVIDE
COUNTIES UNTIL 745 PM CDT...
At 700 PM CDT, strong thunderstorms were located along a line
extending from 9 miles northwest of Westby to 8 miles northwest of
Grenora to 15 miles west of Bonetrail. Movement was east at 40 mph.
Penny size hail and wind gusts to 55 mph will be possible with these
storms.
Locations impacted include...
Grenora, Westby, Alamo, Fortuna, Alkabo, Writing Rock State
Historical Site, Bonetrail, Ambrose, Zahl, Appam, Hanks and Blacktail
Lake.
These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
northwestern North Dakota.
LAT...LON 4900 10343 4885 10331 4836 10348 4830 10405
4900 10405
TIME...MOT...LOC 0000Z 254DEG 34KT 4894 10423 4872 10404 4836 10416
HOLLANThe office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 7:00 PM CDT | Special Weather Statement | BIS | Divide | 45 min |
| Jul 10, 7:38 PM CDT | Special Weather Statement | BIS | Bowman | 37 min |
| Jul 10, 7:41 PM CDT | Special Weather Statement | BIS | Stark | 34 min |
| Jul 10, 7:45 PM CDT | Special Weather Statement | BIS | Williams | 45 min |
| Jul 10, 7:59 PM CDT | Severe Thunderstorm Warning | BIS | Emmons, Logan, McIntosh | 49 min |
| Jul 10, 8:08 PM CDT | Tornado Warning | BIS | Emmons, McIntosh | 17 min |
| Jul 10, 8:13 PM CDT | Severe Thunderstorm Warning | BIS | Bowman | 29 min |
| Jul 10, 8:53 PM CDT | Special Weather Statement | BIS | Mountrail | 37 min |
| Jul 10, 9:39 PM CDT | Special Weather Statement | BIS | Mountrail | 36 min |
| Jul 10, 10:37 PM CDT | Special Weather Statement | BIS | Renville | 23 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 2020Every severe thunderstorm warning in 2020
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.