Alert archive / North Dakota / Special Weather Statements in 2021

Special Weather Statement, NWS Bismarck, ND

July 16, 2021McLean County, North Dakota

NWS Bismarck, ND issued this special weather statement at Jul 16, 2021, 9:57 AM CDT for McLean County, North Dakota. It was in force for 18 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 16, 2021, 9:57 AM CDT (14:57 UTC)
Expired: Jul 16, 2021, 10:15 AM CDT
In force: 18 min
Issued by: NWS Bismarck, ND

County McLean County, ND

The radar

The Bismarck radar (KBIS), 92 km from the middle of the area, began a volume at 15:01 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, 3.0 hours before the alert went out and 94 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 609 J/kg
Mixed-layer CIN: -250 J/kg
Mixed-layer LCL: 1232 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 175 m²/s²
0-3 km storm-relative helicity: 205 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted.

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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 16, 9:35 AM CDT, 22 minutes earlier.

Area forecast discussion, Jul 16, 9:35 AM CDT, 22 minutes before

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Hazardous weather outlook, Jul 16, 9:38 AM CDT, 19 minutes before

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In the hours before

Special weather statement, Jul 16, 8:30 AM CDT, 1 hour 27 minutes before

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Local storm report, Jul 16, 8:31 AM CDT, 1 hour 26 minutes before

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Local storm report, Jul 16, 8:40 AM CDT, 1 hour 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
840 AM CDT FRI JUL 16 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0800 AM     HEAVY RAIN       4 WNW MINOT             48.26N 101.37W
07/16/2021  M2.65 INCH       WARD               ND   COCORAHS

            COCORAHS STATION ND-WR-21 MINOT 4.1 WNW.

&&

AE

Local storm report, Jul 16, 9:08 AM CDT, 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
908 AM CDT FRI JUL 16 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0907 AM     HEAVY RAIN       1 NW MINOT              48.25N 101.32W
07/16/2021  M2.10 INCH       WARD               ND   PUBLIC

            RELAYED VIA SOCIAL MEDIA.

&&

AE

Local storm report, Jul 16, 9:38 AM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
938 AM CDT FRI JUL 16 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0920 AM     HEAVY RAIN       13 S MINOT              48.05N 101.30W
07/16/2021  M3.06 INCH       WARD               ND   PUBLIC

            RELAYED VIA SOCIAL MEDIA. MEASURED AT SOUTH
            PRAIRIE.

&&

AE

Special weather statement, Jul 16, 9:57 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Bismarck ND
957 AM CDT Fri Jul 16 2021

NDZ021-161515-
McLean ND-
957 AM CDT Fri Jul 16 2021

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MCLEAN COUNTY UNTIL 1015
AM CDT...

At 957 AM CDT, a strong thunderstorm was located over Riverdale, or
10 miles south of Garrison, moving southeast at 15 mph.

Nickel size hail and wind gusts to 40 mph will be possible with this
storm.

Locations impacted include...
Riverdale.

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

&&

LAT...LON 4735 10134 4748 10144 4750 10141 4751 10138
      4752 10137 4755 10141 4756 10140 4758 10137
      4749 10113
TIME...MOT...LOC 1457Z 308DEG 15KT 4750 10136

HAMILTON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 5:12 AM CDT	Special Weather Statement	BIS	Renville	33 min
Jul 16, 5:40 AM CDT	Severe Thunderstorm Warning	BIS	Renville	35 min
Jul 16, 6:58 AM CDT	Areal Flood Advisory	BIS	Ward	2 hr
Jul 16, 7:54 AM CDT	Special Weather Statement	BIS	Ward	36 min
Jul 16, 8:30 AM CDT	Special Weather Statement	BIS	Ward	45 min
Jul 16, 12:16 PM CDT	Special Weather Statement	BIS	Burleigh	29 min
Jul 16, 1:01 PM CDT	Special Weather Statement	BIS	Kidder	29 min

Nearby

Special Weather Statements in North Dakota, 2021 Every 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.