Alert archive / North Dakota / Special Weather Statements in 2021

Special Weather Statement, NWS Grand Forks, ND

July 19, 20214 counties in North Dakota

NWS Grand Forks, ND issued this special weather statement at Jul 19, 2021, 7:35 PM CDT for 4 counties in North Dakota. It was in force for 55 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 19, 2021, 7:35 PM CDT (00:35 UTC)
Expired: Jul 19, 2021, 8:30 PM CDT
In force: 55 min
Issued by: NWS Grand Forks, ND

Counties Benson County, ND, Eddy County, ND, Nelson County, ND, Ramsey County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 139 km from the middle of the area, began a volume at 00:34 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.

What was reported inside it

Time	Report	Where	Remark
Jul 19, 7:55 PM CDT	TSTM WND GST 55	2 N Maddock, ND	GUST MEASURED BY NDAWN STATION 10 M WIND SENSOR.
Jul 19, 7:55 PM CDT	TSTM WND GST 55	2 N Maddock, ND	PEAK WIND MEASURED AT AN NDAWN STATION AT 10 METERS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.6 hours before the alert went out and 181 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: 114 J/kg
Mixed-layer CIN: -159 J/kg
Mixed-layer LCL: 2818 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

The text

As transmitted.

145 
WWUS83 KFGF 200035
SPSFGF

Special Weather Statement
National Weather Service Grand Forks ND
735 PM CDT Mon Jul 19 2021
 
NDZ014-015-024-026-200130-
Nelson ND-Eddy ND-Benson ND-Ramsey ND-
735 PM CDT Mon Jul 19 2021

...SIGNIFICANT WEATHER ADVISORY FOR BENSON...NORTHWESTERN NELSON...
RAMSEY AND NORTHERN EDDY COUNTIES UNTIL 830 PM CDT...

At 735 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Edmore to Baker. Movement was south at 30
mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Devils Lake, New Rockford, Camp Grafton, Lakota, Lakewood Park,
Maddock and Fort Totten.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4847 9846 4785 9815 4762 9926 4767 9927
      4768 9930 4785 9930 4785 9968 4820 9974
TIME...MOT...LOC 0035Z 347DEG 27KT 4839 9855 4817 9962 

$$

Riddle

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 8:31 PM CDT	Special Weather Statement	FGF	Grand Forks	59 min
Jul 20, 3:08 AM CDT	Dense Fog Advisory	FGF	Cavalier, Grand Forks, Pembina, Traill, Walsh	7 hr
Jul 19, 8:58 PM CDT	Severe Thunderstorm Warning	FGF	Marshall, Polk	32 min
Jul 20, 5:37 AM CDT	Special Weather Statement	FGF	Lake of the Woods, Roseau	53 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.