Alert archive / North Dakota / Special Weather Statements in 2017
Special Weather Statement, NWS Grand Forks, ND
NWS Grand Forks, ND issued this special weather statement at Jul 29, 2017, 6:28 PM CDT for Towner County, North Dakota. It was in force for 32 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 29, 2017, 6:28 PM CDT (23:28 UTC)
- Expired
- Jul 29, 2017, 7:00 PM CDT
- In force
- 32 min
- Issued by
- NWS Grand Forks, ND
County Towner County, ND
The radar
The Minot AFB radar (KMBX), 113 km from the middle of the area, began a volume at 23:31 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, 11.5 hours before the alert went out and 223 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
- 118 J/kg
- Mixed-layer CIN
- -225 J/kg
- Mixed-layer LCL
- 1200 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</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 Grand Forks, ND wrote its last area forecast discussion before this special weather statement went out at Jul 29, 3:20 PM CDT, 3 hours 8 minutes earlier.
Area forecast discussion, Jul 29, 3:20 PM CDT, 3 hours 8 minutes before
Area Forecast Discussion National Weather Service Grand Forks ND 320 PM CDT Sat Jul 29 2017 .SHORT TERM...(This evening through Sunday) Issued at 313 PM CDT Sat Jul 29 2017 The early aftn surface map shows a bit different scenario than thinking earlier. There is still that boundary but it is still in Manitoba west of Winnipeg then WSW to nr the Manitoba/Saskatchewan/North Dakota border where it meets up with a sfc low east of Williston then a boundary south of there into SW ND. Storms firing along the boundary south of Williston and storms that have been moving slowly southeast across far southern Manitoba between Rolla and Morden. 2-3k j/kg sfc cape near this boundary...but 0-6km 25 kts or so meaning multi-cells are favored with a rather short life span for possible storms near severe limits. This will be the case as these storms form their own boundary and move south-southeast into NE ND. SPC updated to add marginal risk into the nrn RRV which is reasonable considering the instability. But it doesnt look like any appreciable boundary will drop south and instead winds will go light overnight as activity weakens and then Sunday could be a repeat with isold storms in hot/moist environment. Thought better chc of storms Sunday more in SE ND into nrn MN but it could be just about anywhere. Highs Sunday mid 80s to lower 90s. .LONG TERM...(Sunday night through Saturday) Issued at 313 PM CDT Sat Jul 29 2017 Long term period will see a transition to NW flow aloft by 00Z Tue with a strong cold front moving across the region late Mon aftn into the overnight period. Throughout the long term, the ECMWF/GFS solutions are out of phase yielding rather low confidence in the Tue- Fri timeframe. For the aforementioned front, sfc features on Mon are in better agreement than upper pattern Tue and beyond. Sfc boundary will extend from northern valley back into the Devils Lake region by 00Z Tue, near peak heating. SPC continuing a marginal risk for severe across the north on the latest D3 outlook. As mentioned, upper pattern for remainder of week is out of phase and yielding low POPs throughout the Tue-Thu timeframe as GFS is dry and ECMWF is more bullish with precip associated with a mid week wave. Do expect a significant cool down behind the Mon front with Wed-Fri highs falling into the 70s. && .AVIATION...(For the 18Z TAFS through 18Z Sunday afternoon) Issued at 101 PM CDT Sat Jul 29 2017 VFR anticipated. Some cu with heating of the day, though covearge low, Some patches of high level or mid clouds moving east thru the night, but mostly scattered in coverage at most sites. Now near any t-storm conditions will vary, with best chc DVL nr 00z. && .FGF WATCHES/WARNINGS/ADVISORIES... ND...None. MN...None. && SHORT TERM...Riddle LONG TERM...Speicher AVIATION...Riddle
Hazardous weather outlook, Jul 29, 5:01 PM CDT, 1 hour 27 minutes before
Hazardous Weather Outlook National Weather Service Grand Forks ND 501 PM CDT Sat Jul 29 2017 MNZ001-004-005-007-008-013-014-NDZ006>008-014>016-024-026-027-054- 302215- West Polk-Kittson-Roseau-West Marshall-East Marshall-Pennington- Red Lake-Towner-Cavalier-Pembina-Benson-Ramsey- Eastern Walsh County-Eddy-Nelson-Grand Forks-Western Walsh County- 501 PM CDT Sat Jul 29 2017 This hazardous weather outlook is for portions of eastern North Dakota, west central and northwest Minnesota. .DAY ONE...Tonight Scattered thunderstorms will occur early this evening. A few of these storms may be strong to severe with one inch diameter hail, wind gusts to 60 mph, and localized heavy rain possible. .DAYS TWO THROUGH SEVEN...Sunday through Friday Another round of storms is expected Monday afternoon through Monday night. Stronger storms are expected north of a Devils Lake to Grand Forks to Baudette line. Some of these may become severe with hail around one inch in diameter and wind gusts up to 60 mph. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated. MNZ002-003-006-009-015>017-022>024-027>032-040-NDZ028>030-038-039- 049-052-053-302215- Norman-Clay-Lake Of The Woods-North Beltrami-East Polk- North Clearwater-South Beltrami-Mahnomen-South Clearwater-Hubbard- West Becker-East Becker-Wilkin-West Otter Tail-East Otter Tail- Wadena-Grant-Griggs-Steele-Traill-Barnes-Cass-Ransom-Sargent- Richland- 501 PM CDT Sat Jul 29 2017 This hazardous weather outlook is for portions of eastern North Dakota, west central and northwest Minnesota. .DAY ONE...Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday Another round of storms is expected Monday afternoon through Monday night. Stronger storms are expected north of a Devils Lake to Grand Forks to Baudette line. Some of these may become severe with hail around one inch in diameter and wind gusts up to 60 mph. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated.
In the hours before
Special weather statement, Jul 29, 6:28 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Eastern ND/Grand Forks ND
628 PM CDT SAT JUL 29 2017
NDZ006-300000-
Towner ND-
628 PM CDT SAT JUL 29 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN TOWNER COUNTY UNTIL 700
PM CDT...
At 628 PM CDT, Doppler radar was tracking a strong thunderstorm near
Bisbee, or 40 miles northwest of Devils Lake, moving east at 15 mph.
Dime size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Cando, Bisbee, Egeland, Considine and Arndt.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Grand Forks.
&&
LAT...LON 4851 9946 4861 9947 4869 9945 4869 9901
4839 9912 4851 9950
TIME...MOT...LOC 2328Z 292DEG 14KT 4858 9939
BPThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 6:38 PM CDT | Severe Thunderstorm Warning | FGF | Towner | 37 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.