Alert archive / North Dakota / Special Weather Statements in 2017
Special Weather Statement, NWS Bismarck, ND
NWS Bismarck, ND issued this special weather statement at Aug 1, 2017, 2:50 AM MDT for Grant County, North Dakota. It was in force for 40 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 1, 2017, 2:50 AM MDT (08:50 UTC)
- Expired
- Aug 1, 2017, 3:30 AM MDT
- In force
- 40 min
- Issued by
- NWS Bismarck, ND
County Grant County, ND
The radar
The Bismarck radar (KBIS), 66 km from the middle of the area, began a volume at 08:51 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, 8.8 hours before the alert went out and 70 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
- 1523 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 2374 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted.
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</html>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 Jul 31, 4:49 PM MDT, 10 hours 1 minute earlier.
Area forecast discussion, Jul 31, 4:49 PM MDT, 10 hours 1 minute before
Area Forecast Discussion National Weather Service Bismarck ND 549 PM CDT Mon Jul 31 2017 .UPDATE... Issued at 545 PM CDT Mon Jul 31 2017 Have focused the better POPs along the frontal boundary across south central North Dakota. Lowered POPs north for this evening. && .SHORT TERM...(This evening through Tuesday) Issued at 233 PM CDT Mon Jul 31 2017 Forecast concerns this period focus on the thunderstorms and severe weather threat associated with a cold front moving through central North Dakota late this afternoon. Latest CAM models show the focus for thunderstorms will be southwest to northeast across central and southwest North Dakota and moving southeast with time. Sufficient cape and steep low level Lapse rates are present but weak shear will probably mean short lived super cells with a hail and wind threat. Main time period for the convection will be late this afternoon through mid evening. Some lingering showers and isolated thunderstorms southwest on Tuesday. .LONG TERM...(Tuesday night through Monday) Issued at 233 PM CDT Mon Jul 31 2017 The extended forecast will be focused on several shortwaves moving in northwest flow through the region. The first Tuesday night and Wednesday will bring widespread showers and thunderstorms to the region. This will also usher in much cooler air for the remainder of the week. By Friday another shortwave in the primarily northwest flow will bring another chance for showers and scattered thunderstorms Friday night, Saturday and Sunday. this so far looks not as widespread. The ensemble situational awareness table picked out an abnormally high surface pressure across southern canada midweek, associated with cool temperatures. Lowered highs a bit Thursday but there may be more widespread 60s for highs across the region Thursday. && .AVIATION...(For the 00Z TAFS through 00Z Tuesday evening) Issued at 545 PM CDT Mon Jul 31 2017 At 5 PM CDT a cold front extended across south central North Dakota northeast through the Grand Forks area. The front will be the focus for scattered thunderstorms KBIS-KJMS between 00Z and 03Z this evening. Otherwise VFR. && .BIS WATCHES/WARNINGS/ADVISORIES... NONE. && UPDATE...WAA SHORT TERM...WAA LONG TERM...WAA AVIATION...WAA
Hazardous weather outlook, Jul 31, 2:13 PM MDT, 12 hours 37 minutes before
Hazardous Weather Outlook National Weather Service Bismarck ND 313 PM CDT Mon Jul 31 2017 NDZ005-012-013-018>023-025-031>037-040>048-050-051-012015- Rolette-McHenry-Pierce-Dunn-Mercer-Oliver-McLean-Sheridan-Wells- Foster-Golden Valley-Billings-Stark-Morton-Burleigh-Kidder- Stutsman-Slope-Hettinger-Grant-Bowman-Adams-Sioux-Emmons-Logan- La Moure-McIntosh-Dickey- 313 PM CDT Mon Jul 31 2017 /213 PM MDT Mon Jul 31 2017/ This Hazardous Weather Outlook is for portions of north central North Dakota, south central North Dakota, southeast North Dakota, and southwest North Dakota. .DAY ONE...This Afternoon and Tonight Thunderstorms will develop this afternoon and continue into this evening. A few storms could be severe with large hail and damaging winds the likely threats. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday There is chance of thunderstorms across western North Dakota Tuesday night. Numerous showers and thunderstorms are forecast Wednesday across all of western and central North Dakota. Scattered thunderstorms are forecast for Saturday and Sunday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed Monday afternoon and evening across southwest and central North Dakota. NDZ001>004-009>011-017-012015- Divide-Burke-Renville-Bottineau-Williams-Mountrail-Ward-McKenzie- 313 PM CDT Mon Jul 31 2017 /213 PM MDT Mon Jul 31 2017/ This Hazardous Weather Outlook is for portions of north central North Dakota and northwest North Dakota. .DAY ONE...This Afternoon and Tonight The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday There is chance of thunderstorms across western North Dakota Tuesday night. Numerous showers and thunderstorms are forecast Wednesday across all of western and central North Dakota. Scattered thunderstorms are forecast for Saturday and Sunday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed Monday afternoon and evening across southwest and central North Dakota. waa
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 6:05 PM MDT | Special Weather Statement | BIS | Kidder | 25 min |
| Aug 1, 2:07 AM MDT | Special Weather Statement | BIS | Stark | 38 min |
| Aug 1, 3:17 AM MDT | Special Weather Statement | BIS | Hettinger | 43 min |
| Aug 1, 4:05 AM MDT | Special Weather Statement | BIS | Grant, Sioux | 40 min |
| Aug 1, 4:41 AM MDT | Special Weather Statement | BIS | Sioux | 49 min |
| Aug 1, 4:59 AM MDT | Special Weather Statement | BIS | Sioux | 46 min |
Nearby
Special Weather Statements in North Dakota, 2017Every 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.