Alert archive / North Dakota / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 69, NWS Bismarck, ND

June 20, 2020LaMoure County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jun 20, 2020, 3:56 PM CDT for LaMoure County, North Dakota. It was in force for 49 min. 1 report 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: Jun 20, 2020, 3:56 PM CDT (20:56 UTC)
Expired: Jun 20, 2020, 4:45 PM CDT
In force: 49 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County LaMoure County, ND

The radar

The Aberdeen radar (KABR), 110 km from the middle of the area, began a volume at 20:59 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
Jun 20, 4:25 PM CDT	HAIL 1	7 Ne Edgeley, ND	ALSO VERY STRONG WINDS ESTIMATED AT 60 TO 70 MPH.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 29 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 8.9 hours before the alert went out and 156 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: 2 J/kg
Mixed-layer CIN: -184 J/kg
Mixed-layer LCL: 1525 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

040 
WUUS53 KBIS 202056
SVRBIS
NDC045-202145-
/O.NEW.KBIS.SV.W.0069.200620T2056Z-200620T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
356 PM CDT Sat Jun 20 2020

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Southwestern LaMoure County in southeastern North Dakota...

* Until 445 PM CDT.

* At 356 PM CDT, a severe thunderstorm was located 5 miles northwest
  of Edgeley, moving east at 25 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Edgeley around 405 PM CDT.

Other locations impacted by this severe thunderstorm include Berlin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4638 9891 4651 9887 4652 9846 4633 9849
TIME...MOT...LOC 2056Z 275DEG 20KT 4643 9877 

HAIL...1.25IN
WIND...60MPH
 
$$

HOLLAN

3 follow-up statements

619 
WWUS53 KBIS 202111
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
411 PM CDT Sat Jun 20 2020

NDC045-202145-
/O.CON.KBIS.SV.W.0069.000000T0000Z-200620T2145Z/
LaMoure ND-
411 PM CDT Sat Jun 20 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR CENTRAL LAMOURE COUNTY...

At 410 PM CDT, a severe thunderstorm was located 6 miles northeast of
Edgeley, moving east at 25 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe thunderstorm will remain over mainly rural areas of
central LaMoure County, including the following locations... Berlin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4637 9878 4651 9874 4652 9846 4633 9849
TIME...MOT...LOC 2110Z 272DEG 21KT 4644 9864 

HAIL...1.25IN
WIND...60MPH
 
$$

HOLLAN

708 
WWUS53 KBIS 202124
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
424 PM CDT Sat Jun 20 2020

NDC045-202145-
/O.CON.KBIS.SV.W.0069.000000T0000Z-200620T2145Z/
LaMoure ND-
424 PM CDT Sat Jun 20 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR CENTRAL LAMOURE COUNTY...

At 423 PM CDT, a severe thunderstorm was located 8 miles southwest of
Dickey, or 9 miles northeast of Edgeley, moving east at 25 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Berlin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4638 9865 4651 9862 4652 9846 4635 9849
TIME...MOT...LOC 2123Z 277DEG 20KT 4642 9854 

HAIL...1.00IN
WIND...60MPH
 
$$

HOLLAN

378 
WWUS53 KBIS 202135
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
435 PM CDT Sat Jun 20 2020

NDC045-202145-
/O.EXP.KBIS.SV.W.0069.000000T0000Z-200620T2145Z/
LaMoure ND-
435 PM CDT Sat Jun 20 2020

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LAMOURE COUNTY WILL
EXPIRE AT 445 PM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Bismarck.

LAT...LON 4638 9865 4651 9862 4652 9846 4635 9849
TIME...MOT...LOC 2135Z 275DEG 20KT 4642 9846 

$$

HOLLAN

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jun 20, 2:25 PM CDT, 1 hour 31 minutes earlier.

Area forecast discussion, Jun 20, 2:25 PM CDT, 1 hour 31 minutes before

Area Forecast Discussion
National Weather Service Bismarck ND
225 PM CDT Sat Jun 20 2020

.SHORT TERM...(This evening through Sunday)
Issued at 225 PM CDT Sat Jun 20 2020

Upper level cut-off low remains nearly stationary over
Saskatchewan/Manitoba region. Weak surface low was located just
north of ND with a trailing cold front extending across ND into
Montana. The front is expected to slowly sag southward and
support additional precip chances over mainly western and southern
areas late tonight through Sunday. Surface analysis also shows a
N-S oriented trough over central ND. The James River Valley region
remains in slight risk area for severe storms. Latest SPC
mesoanalysis shows over 1000 J/kg of MLCAPE across that region
with effective shear only around 30kt and little inhibition.
Around 18Z storms quickly fired up, but likely due to lack of
shear have not been very organized. No big changes with pops,
carrying likely across the southeast and quickly tapering them off
early this evening. Overnight, pops are reintroduced across the
west, spreading eastward during the day on Sunday. Pops are
likely/categorical across the southwest and southcentral on
Sunday with frontal forcing, weak instability of 200-400 J/kg CAPE
and embedded shortwaves in larger scale cyclonic flow.

.LONG TERM...(Sunday night through Saturday)
Issued at 225 PM CDT Sat Jun 20 2020

Precip chances decrease Sunday night, but the active pattern will
continue early next week with upper level cut-off low filling as
it slowly reaches western Ontario by Monday. Meanwhile, an upper
level ridge axis slowly nudges across the intermountain west,
placing the Northern Plains in northwest flow. Some differences
develop between the global models with the ECMWF a little more
progressive with the upper ridge, while the GFS maintains a
stronger cut off low that impedes the ridge from getting as far
east. So although the pattern will favor drier weather mid-week,
greater uncertainty exists for potential warmer weather. The
current forecast reflects a gradual warming trend during the week
with highs near 80 by Wednesday.

&&

.AVIATION...(For the 18Z TAFS through 18Z Sunday afternoon)
Issued at 1220 PM CDT Sat Jun 20 2020

Best chances for thunderstorms will be for KJMS this afternoon and
early evening. Have continued to carry a period of SHRA and tempo
+TSRA from 20-22Z. Additional showers are expected to move in from
the west overnight into Sunday.

&&

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

SHORT TERM...JNS
LONG TERM...JNS
AVIATION...JNS

Hazardous weather outlook, Jun 20, 2:50 PM CDT, 1 hour 6 minutes before

Hazardous Weather Outlook
National Weather Service Bismarck ND
250 PM CDT Sat Jun 20 2020

NDZ001>005-009>013-017>023-031>035-040>045-212000-
Divide-Burke-Renville-Bottineau-Rolette-Williams-Mountrail-Ward-
McHenry-Pierce-McKenzie-Dunn-Mercer-Oliver-McLean-Sheridan-Wells-
Golden Valley-Billings-Stark-Morton-Burleigh-Slope-Hettinger-
Grant-Bowman-Adams-Sioux-
250 PM CDT Sat Jun 20 2020 /150 PM MDT Sat Jun 20 2020/

This Hazardous Weather Outlook is for portions of north central
North Dakota, northwest North Dakota, south central North Dakota,
and southwest North Dakota.

.DAY ONE...This Afternoon and Tonight

There is a chance of thunderstorms, mainly south. Severe weather
is not expected.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Thunderstorms are possible Sunday, with the greatest chances over
southwest and south central North Dakota. Severe weather is not
expected.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

NDZ025-036-037-046>048-050-051-212000-
Foster-Kidder-Stutsman-Emmons-Logan-La Moure-McIntosh-Dickey-
250 PM CDT Sat Jun 20 2020

This Hazardous Weather Outlook is for portions of south central
North Dakota and southeast North Dakota.

.DAY ONE...This Afternoon and Tonight

Thunderstorms are likely this afternoon and early this evening.
Some storms may be severe, with large hail up to quarter size and
wind gusts to 60 mph.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Thunderstorms are possible Sunday, with the greatest chances over
southwest and far south central North Dakota. Severe weather is
not expected.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to send severe weather reports to law
enforcement, NWS Bismarck social media, or directly to NWS
Bismarck by calling 701-250-4224.

jns

In the hours before

Special weather statement, Jun 20, 1:18 PM CDT, 2 hours 38 minutes before

Special Weather Statement
National Weather Service Bismarck ND
118 PM CDT Sat Jun 20 2020

NDZ048-201900-
La Moure ND-
118 PM CDT Sat Jun 20 2020

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN LAMOURE COUNTY UNTIL 200
PM CDT...

At 117 PM CDT, a strong thunderstorm was located 5 miles west of
Dickey, or 13 miles northeast of Edgeley, moving northeast at 15 mph.

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

Locations impacted include...
Marion, Adrian, Dickey and Nortonville.

LAT...LON 4636 9867 4655 9878 4663 9857 4663 9806
TIME...MOT...LOC 1817Z 235DEG 15KT 4652 9858

JONES

Special weather statement, Jun 20, 2:26 PM CDT, 1 hour 30 minutes before

Special Weather Statement
National Weather Service Bismarck ND
226 PM CDT Sat Jun 20 2020

NDZ048-202015-
La Moure ND-
226 PM CDT Sat Jun 20 2020

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL LAMOURE COUNTY UNTIL 315
PM CDT...

At 226 PM CDT, a strong thunderstorm was located 7 miles northeast of
Edgeley, moving northeast at 15 mph.

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

Locations impacted include...
Lamoure, Marion, Dickey, Grand Rapids and Berlin.

LAT...LON 4629 9861 4646 9872 4663 9830 4663 9827
      4639 9812
TIME...MOT...LOC 1926Z 246DEG 14KT 4641 9857

JONES

Special weather statement, Jun 20, 3:08 PM CDT, 48 minutes before

Special Weather Statement
National Weather Service Bismarck ND
308 PM CDT Sat Jun 20 2020

NDZ051-202100-
Dickey ND-
308 PM CDT Sat Jun 20 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN DICKEY COUNTY UNTIL
400 PM CDT...

At 308 PM CDT, a strong thunderstorm was located over Fullerton, or
11 miles north of Ellendale, moving northeast at 20 mph.

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

Locations impacted include...
Fullerton and Glover.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4604 9846 4612 9859 4629 9844 4628 9801
      4626 9801
TIME...MOT...LOC 2008Z 226DEG 15KT 4616 9844

HOLLAN

Special weather statement, Jun 20, 3:19 PM CDT, 37 minutes before

Special Weather Statement
National Weather Service Bismarck ND
319 PM CDT Sat Jun 20 2020

NDZ048-202100-
La Moure ND-
319 PM CDT Sat Jun 20 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN LAMOURE COUNTY UNTIL
400 PM CDT...

At 319 PM CDT, a strong thunderstorm was located 8 miles southeast of
Marion, or 26 miles northeast of Edgeley, moving northeast at 20 mph.

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

This storm will remain over mainly rural areas of northeastern
LaMoure County.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4641 9835 4654 9838 4663 9821 4663 9804
      4662 9803 4646 9804
TIME...MOT...LOC 2019Z 245DEG 17KT 4652 9821

HOLLAN

Special weather statement, Jun 20, 3:33 PM CDT, 23 minutes before

Special Weather Statement
National Weather Service Bismarck ND
333 PM CDT Sat Jun 20 2020

NDZ047-048-202115-
La Moure ND-Logan ND-
333 PM CDT Sat Jun 20 2020

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN LAMOURE AND EAST CENTRAL
LOGAN COUNTIES UNTIL 415 PM CDT...

At 333 PM CDT, a strong thunderstorm was located 6 miles southwest of
Jud, or 13 miles northwest of Edgeley, moving east at 25 mph.

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

Locations impacted include...
Edgeley and Jud.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4639 9912 4651 9912 4657 9858 4635 9856
TIME...MOT...LOC 2033Z 273DEG 24KT 4645 9897

HOLLAN

Special weather statement, Jun 20, 3:51 PM CDT, 5 minutes before

Special Weather Statement
National Weather Service Bismarck ND
351 PM CDT Sat Jun 20 2020

NDZ037-048-202130-
La Moure ND-Stutsman ND-
351 PM CDT Sat Jun 20 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL LAMOURE AND
SOUTHEASTERN STUTSMAN COUNTIES UNTIL 430 PM CDT...

At 351 PM CDT, a strong thunderstorm was located near Adrian, or 18
miles north of Edgeley, moving east at 20 mph.

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

Locations impacted include...
Adrian and Montpelier.

LAT...LON 4655 9842 4657 9871 4667 9875 4673 9844
      4663 9844 4663 9842
TIME...MOT...LOC 2051Z 252DEG 17KT 4662 9864

HOLLAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 1:18 PM CDT	Special Weather Statement	BIS	LaMoure	42 min
Jun 20, 2:26 PM CDT	Special Weather Statement	BIS	LaMoure	49 min
Jun 20, 3:08 PM CDT	Special Weather Statement	BIS	Dickey	52 min
Jun 20, 3:19 PM CDT	Special Weather Statement	BIS	LaMoure	41 min
Jun 20, 3:33 PM CDT	Special Weather Statement	BIS	LaMoure	42 min
Jun 20, 3:51 PM CDT	Special Weather Statement	BIS	LaMoure	39 min
Jun 20, 4:18 PM CDT	Special Weather Statement	BIS	Dickey	42 min
Jun 20, 4:59 PM CDT	Severe Thunderstorm Warning	BIS	Dickey	46 min
Jun 20, 5:38 PM CDT	Severe Thunderstorm Warning	BIS	Dickey	52 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2020 Every severe thunderstorm warning in 2020

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.