Alert archive / North Dakota / Tornado Warnings in 2020

Tornado Warning 32, NWS Grand Forks, ND

August 9, 2020Traill County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Aug 9, 2020, 2:36 PM CDT for Traill County, North Dakota. It was in force for 28 min. 5 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
Aug 9, 2020, 2:36 PM CDT (19:36 UTC)
Expired
Aug 9, 2020, 3:04 PM CDT
In force
28 min
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon
Tornado
Observed
Hail
0.75 in

County Traill County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 20 km from the middle of the area, began a volume at 19:39 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

TimeReportWhereRemark
Aug 9, 2:45 PM CDTFUNNEL CLOUD4 W Hillsboro, NDPHOTO,REPORT,AND TIME POSTED VIA SOCIAL MEDIA. FUNNEL VERY CLOSE TO TOUCHDOWN.
Aug 9, 2:45 PM CDTFUNNEL CLOUD4 W Hillsboro, NDPHOTO,REPORT,AND TIME POSTED VIA SOCIAL MEDIA. FUNNEL VERY CLOSE TO TOUCHDOWN.
Aug 9, 2:45 PM CDTTORNADO 04 W Hillsboro, NDPHOTO, REPORT, AND TIME POSTED VIA SOCIAL MEDIA. MULTIPLE REPORTS OF A BRIEF TOUCHDOWN. POSSIBLE TRACK LESS THAN ONE QUATER MILE. PEAK WINDS ESTIMATED TO 70 MPH. MAXIMUM WIDTH TO 30 YARDS.
Aug 9, 2:57 PM CDTFUNNEL CLOUD6 Wnw Halstad, NDPERSISTENT WALL CLOUDS WITH SMALL FUNNEL LOWERING. VIEWED TO NORTH FROM HIGHWAY 200. PHOTO AND REPORT POSTED VIA SOCIAL MEDIA.
Aug 9, 2:57 PM CDTFUNNEL CLOUD6 Wnw Halstad, NDPERSISTENT WALL CLOUDS WITH SMALL FUNNEL LOWERING. VIEWED TO NORTH FROM HIGHWAY 200. PHOTO AND REPORT POSTED VIA SOCIAL MEDIA.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 9, 12:18 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 7.6 hours before the alert went out and 281 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, Bismarck Municip, ND at 12:00Z on 2020-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2140 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 12:00Z on 2020-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 95 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
2140 J/kg
Mixed-layer CIN
-174 J/kg
Mixed-layer LCL
843 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
95 m²/s²
0-3 km storm-relative helicity
127 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

The text

As transmitted.

213 
WFUS53 KFGF 091936
TORFGF
NDC097-092015-
/O.NEW.KFGF.TO.W.0032.200809T1936Z-200809T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Grand Forks ND
236 PM CDT Sun Aug 9 2020

The National Weather Service in Grand Forks has issued a

* Tornado Warning for...
  Central Traill County in southeastern North Dakota...

* Until 315 PM CDT.

* At 235 PM CDT, a confirmed tornado was located near Blanchard, or
  34 miles south of Grand Forks, moving east at 20 mph.

  HAZARD...Tornado.

  SOURCE...Law enforcement reported a funnel cloud.

  IMPACT...Expect damage to mobile homes, roofs, and vehicles.

* The tornado will be near...
  Hillsboro around 255 PM CDT.

Other locations impacted by this tornadic thunderstorm include
American Crystal Sugar.

This includes Interstate 29 between mile markers 101 and 110.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 4738 9727 4748 9723 4750 9688 4735 9694
TIME...MOT...LOC 1935Z 278DEG 18KT 4742 9719 

TORNADO...OBSERVED
HAIL...<.75IN

$$

DJR
2 follow-up statements
991 
WWUS53 KFGF 091954
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
254 PM CDT Sun Aug 9 2020

NDC097-092015-
/O.CON.KFGF.TO.W.0032.000000T0000Z-200809T2015Z/
Traill ND-
254 PM CDT Sun Aug 9 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM CDT FOR EAST
CENTRAL TRAILL COUNTY...
    
At 254 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Hillsboro, or 35 miles south of Grand Forks, moving
east at 25 mph.

HAZARD...TORNADO.

SOURCE...Radar indicated rotation.

IMPACT...Expect damage to mobile homes, roofs, and vehicles.

This tornadic thunderstorm will remain over mainly rural areas of
east central Traill County.

This includes Interstate 29 between mile markers 101 and 102.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4736 9707 4746 9703 4748 9689 4735 9694
TIME...MOT...LOC 1954Z 277DEG 24KT 4740 9698 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

DJR
120 
WWUS53 KFGF 092004
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
304 PM CDT Sun Aug 9 2020

NDC097-092014-
/O.CAN.KFGF.TO.W.0032.000000T0000Z-200809T2015Z/
Traill ND-
304 PM CDT Sun Aug 9 2020

...THE TORNADO WARNING FOR EAST CENTRAL TRAILL COUNTY IS CANCELLED...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.  However
small hail and gusty winds are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 700 PM CDT for
southeastern North Dakota.

LAT...LON 4736 9707 4746 9703 4748 9689 4735 9694
TIME...MOT...LOC 2003Z 278DEG 18KT 4739 9690 

$$

DJR

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 4:29 AM CDTSpecial Weather StatementFGFRichland61 min
Aug 9, 5:31 AM CDTSpecial Weather StatementFGFRansom59 min
Aug 9, 6:01 AM CDTSevere Thunderstorm WarningFGFBenson, Ramsey59 min
Aug 9, 6:57 AM CDTSpecial Weather StatementFGFBenson, Ramsey48 min
Aug 9, 9:09 AM CDTSpecial Weather StatementFGFGrand Forks66 min
Aug 9, 9:51 AM CDTSpecial Weather StatementFGFWalsh54 min
Aug 9, 10:12 AM CDTSevere Thunderstorm WarningFGFGrand Forks, Nelson, Ramsey, Walsh63 min
Aug 9, 10:24 AM CDTSpecial Weather StatementFGFCavalier, Towner66 min
Aug 9, 11:05 AM CDTSpecial Weather StatementFGFWalsh55 min
Aug 9, 11:24 AM CDTSpecial Weather StatementFGFCavalier, Pembina66 min
Aug 9, 11:28 AM CDTSevere Thunderstorm WarningFGFCavalier, Pembina, Walsh62 min
Aug 9, 11:42 AM CDTTornado WarningFGFCavalier, Pembina, Walsh36 min
Aug 9, 12:21 PM CDTSevere Thunderstorm WarningFGFCavalier, Pembina, Walsh54 min
Aug 9, 12:27 PM CDTSpecial Weather StatementFGFGrand Forks, Nelson, Walsh63 min
Aug 9, 1:29 PM CDTSpecial Weather StatementFGFGrand Forks61 min
Aug 9, 1:39 PM CDTSevere Thunderstorm WarningFGFGrand Forks, Walsh66 min
Aug 9, 2:10 PM CDTSevere Thunderstorm WarningFGFGrand Forks, Traill65 min
Aug 9, 2:14 PM CDTTornado WarningFGFBarnes, Cass18 min
Aug 9, 2:25 PM CDTTornado WarningFGFCass30 min
Aug 9, 2:52 PM CDTSevere Thunderstorm WarningFGFCass, Traill53 min
Aug 9, 3:12 PM CDTSevere Thunderstorm WarningFGFTraill63 min
Aug 9, 3:20 PM CDTSevere Thunderstorm WarningFGFCass22 min
Aug 9, 3:35 PM CDTTornado WarningFGFCass18 min
Aug 9, 3:38 PM CDTSevere Thunderstorm WarningFGFRansom, Sargent25 min
Aug 9, 3:53 PM CDTSevere Thunderstorm WarningFGFCass, Traill48 min
Aug 9, 3:55 PM CDTSevere Thunderstorm WarningFGFSargent28 min
Aug 9, 4:24 PM CDTSpecial Weather StatementFGFSargent36 min

Nearby

Tornado Warnings in North Dakota, 2020Every tornado warning in 2020Tornadoes 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.