Alert archive / North Dakota / Special Weather Statements in 2021

Special Weather Statement, NWS Bismarck, ND

September 2, 2021Renville County, North Dakota

NWS Bismarck, ND issued this special weather statement at Sep 2, 2021, 5:39 AM CDT for Renville County, North Dakota. It was in force for 51 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
Sep 2, 2021, 5:39 AM CDT (10:39 UTC)
Expired
Sep 2, 2021, 6:30 AM CDT
In force
51 min
Issued by
NWS Bismarck, ND
Hail
0.50 in
Wind
30

County Renville County, ND

The radar

The Minot AFB radar (KMBX), 59 km from the middle of the area, began a volume at 10:41 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

Aberdeen, SD (KABR), launched 00:00Z, 10.7 hours before the alert went out and 490 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-pSkew-T log-p diagram, Aberdeen, SD at 00:00Z on 2021-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 00:00Z on 2021-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 158 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
12 J/kg
Mixed-layer CIN
-408 J/kg
Mixed-layer LCL
1249 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
158 m²/s²
0-3 km storm-relative helicity
161 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

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 Bismarck, ND wrote its last area forecast discussion before this special weather statement went out at Sep 2, 3:56 AM CDT, 1 hour 43 minutes earlier.

Area forecast discussion, Sep 2, 3:56 AM CDT, 1 hour 43 minutes before
Area Forecast Discussion
National Weather Service Bismarck ND
356 AM CDT Thu Sep 2 2021

.SHORT TERM...(Today and tonight)
Issued at 354 AM CDT Thu Sep 2 2021

Look for cooler temperatures today with widespread showers and
thunderstorms.

Two weather makers will bring chances for showers and
thunderstorms across the region today. A cold front across
northwestern ND will slowly advance eastward today brining some
showers and thunderstorms. Meanwhile an upper level disturbance
with a large plume of moisture looks to also move across central
and eastern portions today, bringing perhaps better chances for
showers and thunderstorms today. Neither disturbance looks to
have enough instability for any strong thunderstorms today.
Activity along the front looks to be scattered along and ahead of
it, with limited activity expected behind in northwestern ND.
Meanwhile activity with the upper level disturbance looks to be
more widespread. This upper level disturbance also holds an
abundant amount of monsoonal type moisture. The result could be
some locally heavy rainfall at times, especially in the southeast.
Highs today look to cool into the 60s and 70s, with light winds
eventually coming northerly.

Tonight, precipitation from these features looks to generally
diminish this evening across the east. Another approaching
disturbance could redevelop showers across the southwest later
tonight. Lows tonight may be quite cooler for some areas with 40s
and 50s possible for most areas.

.LONG TERM...(Friday through Wednesday)
Issued at 354 AM CDT Thu Sep 2 2021

Generally dry and seasonal conditions are expected for the Labor
Day weekend, and possibly continuing into next week.

Upper low well into Canada looks to swing a trough across the area
on Friday. This could produce some scattered shower and
thunderstorm activity, mainly across the south. With limited
instability, severe weather is generally not expected at this
time. Otherwise look for continued cooler temperature for Friday,
with perhaps a breezy at times west wind.

Labor Day weekend then sees weak to flat ridging across the area.
The result looks to be an overall dry and warming holiday
weekend. With the drying and warming conditions, some lower RH
values could return across the west at times. Breezy winds
Saturday and again Monday could also bring an increased fire
weather danger threat. Look for temperatures to warm into the 70s
and 80s for the weekend, which is near to slightly above normal
for this time of year.

Ridge looks to continue to build across the western US through at
least mid next week. A back door cold front may attempt to push
its way later Monday into Tuesday next week, perhaps slightly
cooling temperatures. This front could bring a few isolated
showers, although appears to be mainly dry at this time. Breezy
winds may also be found at times. Mid to late next week will then
see the ridge progress further eastward. This could bring more
seasonal temperatures and generally dry conditions to the region.

&&

.AVIATION...(For the 06Z TAFS through 06Z Thursday night)
Issued at 1259 AM CDT Thu Sep 2 2021

Period of mid to low clouds look to linger through tonight, with
perhaps some MVFR ceilings at times. And isolated to scattered
shower or thunderstorm is possible tonight, although confidence
remains low. Thursday morning into the afternoon will then see
increasing chances for showers and thunderstorms, with continued
low cloud cover. Most sites could see MVFR to brief IFR conditions
as a result, except across the northwest where generally VFR
conditions are expected. Conditions look to improve from northwest
to southeast later in the day Thursday. By Thursday evening most
sites may return to VFR conditions, with rain generally ending.
Look for variable winds tonight becoming southeast across the
east, and northerly across the west. Most sites may then see
northerly breezes this evening.

&&

.BIS WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SHORT TERM...Anglin
LONG TERM...Anglin
AVIATION...Anglin
Hazardous weather outlook, Sep 2, 3:23 AM CDT, 2 hours 16 minutes before
Hazardous Weather Outlook
National Weather Service Bismarck ND
323 AM CDT Thu Sep 2 2021

NDZ001>005-009>013-017>023-025-031>037-040>048-050-051-030830-
Divide-Burke-Renville-Bottineau-Rolette-Williams-Mountrail-Ward-
McHenry-Pierce-McKenzie-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-
323 AM CDT Thu Sep 2 2021 /223 AM MDT Thu Sep 2 2021/

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...Today and Tonight

Showers and thunderstorms are expected through the day today.
Severe weather is not expected at this time. Locally heavy rain is
also possible today, mainly in the southeast.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

In the hours before

Special weather statement, Sep 2, 5:32 AM CDT, 7 minutes before
Special Weather Statement
National Weather Service Bismarck ND
532 AM CDT Thu Sep 2 2021

NDZ009-010-017-021100-
McKenzie ND-Mountrail ND-Williams ND-
532 AM CDT Thu Sep 2 2021

...A strong thunderstorm will impact portions of northeastern
McKenzie, east central Williams and west central Mountrail Counties
through 600 AM CDT...

At 530 AM CDT, Doppler radar was tracking a strong thunderstorm 13
miles west of 4 Bears Lodge, or 26 miles northeast of Watford City,
moving northeast at 20 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.

This storm will remain over mainly rural areas of northeastern
McKenzie, east central Williams and west central Mountrail Counties,
including the following locations... White Earth Bay Recreation Area
and Charlson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

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.

If on or near Lake Sakakawea, get out of the water and move indoors
or inside a vehicle. Remember, lightning can strike out to 10 miles
from the parent thunderstorm. If you can hear thunder, you are close
enough to be struck by lightning. Move to safe shelter now! Do not
be caught on the water in a thunderstorm.

&&

LAT...LON 4792 10288 4796 10303 4808 10301 4836 10270
      4836 10242 4809 10243
TIME...MOT...LOC 1030Z 239DEG 18KT 4804 10285

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

ANGLIN
Special weather statement, Sep 2, 5:39 AM CDT, 0 minutes before
Special Weather Statement
National Weather Service Bismarck ND
539 AM CDT Thu Sep 2 2021

NDZ003-004-011-021130-
Bottineau ND-Ward ND-Renville ND-
539 AM CDT Thu Sep 2 2021

...A strong thunderstorm will impact portions of north central Ward,
northwestern Bottineau and western Renville Counties through 630 AM
CDT...

At 538 AM CDT, Doppler radar was tracking a strong thunderstorm 5
miles west of Greene, or 16 miles southwest of Mohall, moving
northeast at 30 mph.

HAZARD...Winds in excess of 30 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

This strong thunderstorm will be near...
  Greene around 550 AM CDT.

Other locations in the path of this storm include Mohall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

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.

&&

LAT...LON 4892 10086 4881 10115 4851 10182 4868 10201
      4900 10156 4900 10088
TIME...MOT...LOC 1038Z 230DEG 24KT 4866 10183

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...30 MPH

ANGLIN

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 1, 10:54 PM CDTSpecial Weather StatementBISLaMoure36 min
Sep 2, 5:32 AM CDTSpecial Weather StatementBISMountrail28 min
Sep 2, 5:45 AM CDTSevere Thunderstorm WarningBISMountrail30 min
Sep 2, 5:56 AM CDTSpecial Weather StatementBISMountrail34 min
Sep 2, 6:28 AM CDTSpecial Weather StatementBISRenville47 min
Sep 2, 6:30 AM CDTSpecial Weather StatementBISMcKenzie30 min
Sep 2, 6:51 AM CDTSpecial Weather StatementBISKidder, Stutsman39 min
Sep 2, 6:55 AM CDTSpecial Weather StatementBISDunn35 min
Sep 2, 7:22 AM CDTSpecial Weather StatementBISBottineau, Ward23 min
Sep 2, 7:40 AM CDTSevere Thunderstorm WarningBISBottineau, Renville, Ward29 min
Sep 2, 8:30 AM CDTSpecial Weather StatementBISBottineau30 min
Sep 2, 10:04 AM CDTSevere Thunderstorm WarningBISBillings, Golden Valley, Slope41 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.