Alert archive / North Dakota / Tornado Warnings in 2011

Tornado Warning 15, NWS Bismarck, ND

June 20, 2011Oliver County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jun 20, 2011, 2:12 PM CDT for Oliver County, North Dakota. It was in force for 33 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: Jun 20, 2011, 2:12 PM CDT (19:12 UTC)
Expired: Jun 20, 2011, 2:45 PM CDT
In force: 33 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon

County Oliver County, ND

The radar

The Bismarck radar (KBIS), 58 km from the middle of the area, began a volume at 19:14 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, 2:13 PM CDT	FUNNEL CLOUD	8 S Center, ND	2 FUNNELS ... 8 SOUTH OF CENTER AND 4 EAST OF HWY 31. RELAY BY STATE RADIO
Jun 20, 2:25 PM CDT	FUNNEL CLOUD	9 Se Center, ND	3 FUNNELS REPORTED BY PUBLIC. LAW ENFORCEMENT VERIFIED THE FUNNELS ARE NOT TOUCHING THE GROUND.

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 12:00Z, 7.2 hours before the alert went out and 62 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: 17 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1023 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

091 
WFUS53 KBIS 201912
TORBIS
NDC065-201945-
/O.NEW.KBIS.TO.W.0015.110620T1912Z-110620T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
212 PM CDT MON JUN 20 2011

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL OLIVER COUNTY IN SOUTH CENTRAL NORTH DAKOTA...

* UNTIL 245 PM CDT

* AT 209 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD
  NEAR CENTER...OR 32 MILES NORTHWEST OF BISMARCK. A TORNADO MAY
  DEVELOP AT ANY TIME. DOPPLER RADAR SHOWED THIS DANGEROUS STORM
  MOVING WEST AT 10 MPH.

  AT 210 PM CDT EMERGENCY MANAGERS AND LAW ENFORCEMENT REPORTED      
  MULTIPLE FUNNELS NEAR CENTER.  

* LOCATIONS IMPACTED INCLUDE...
  HANNOVER AND CENTER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4700 10151 4723 10149 4723 10115 4700 10114
TIME...MOT...LOC 1911Z 100DEG 7KT 4709 10133

$$

WETZEL

2 follow-up statements

703 
WWUS53 KBIS 201934
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
234 PM CDT MON JUN 20 2011

NDC065-201945-
/O.CON.KBIS.TO.W.0015.000000T0000Z-110620T1945Z/
OLIVER ND-
234 PM CDT MON JUN 20 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL OLIVER COUNTY
UNTIL 245 PM CDT...

AT 228 PM CDT...TRAINED WEATHER SPOTTERS CONTINUED TO REPORT A 
FUNNEL CLOUD OVER CENTRAL OLIVER COUNTY.  A TORNADO MAY DEVELOP AT 
ANY TIME. THIS DANGEROUS STORM WAS LOCATED NEAR HANNOVER...OR 34 
MILES NORTHWEST OF BISMARCK...MOVING WEST AT 10 MPH.

LOCATIONS IMPACTED INCLUDE...
  HANNOVER AND CENTER. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4700 10151 4723 10149 4723 10115 4700 10114
TIME...MOT...LOC 1933Z 100DEG 7KT 4710 10139

$$

213 
WWUS53 KBIS 201944
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
244 PM CDT MON JUN 20 2011

NDC065-201954-
/O.EXP.KBIS.TO.W.0015.000000T0000Z-110620T1945Z/
OLIVER ND-
244 PM CDT MON JUN 20 2011

...THE TORNADO WARNING FOR CENTRAL OLIVER COUNTY WILL EXPIRE AT 245
PM CDT/145 PM MDT/...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE IN BISMARCK AT
701-223-4582.

LAT...LON 4700 10151 4723 10149 4723 10115 4700 10114
TIME...MOT...LOC 1944Z 100DEG 7KT 4710 10142

$$

WETZEL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 7:36 PM CDT	Tornado Warning	BIS	Golden Valley	24 min
Jun 19, 8:26 PM CDT	Flash Flood Warning	BIS	Golden Valley	3 hr
Jun 19, 11:15 PM CDT	Areal Flood Warning	BIS	Mountrail	17 hr
Jun 20, 1:04 AM CDT	Areal Flood Advisory	BIS	Stutsman	5 hr
Jun 20, 5:58 AM CDT	Areal Flood Advisory	BIS	Foster, Stutsman	25 min
Jun 20, 6:19 AM CDT	Flash Flood Warning	BIS	Foster, Stutsman	6 hr
Jun 20, 2:31 PM CDT	Tornado Warning	BIS	McLean	29 min
Jun 20, 2:46 PM CDT	Tornado Warning	BIS	Morton	29 min
Jun 20, 3:15 PM CDT	Tornado Warning	BIS	Mercer	30 min
Jun 20, 6:53 PM CDT	Areal Flood Advisory	BIS	Oliver	12 hr

Nearby

Tornado Warnings in North Dakota, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.