Alert archive / North Dakota / Tornado Warnings in 2011

Tornado Warning 42, NWS Bismarck, ND

July 10, 2011Dickey County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jul 10, 2011, 4:30 PM CDT for Dickey County, North Dakota. It was in force for 30 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 10, 2011, 4:30 PM CDT (21:30 UTC)
Expired: Jul 10, 2011, 5:00 PM CDT
In force: 30 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon

County Dickey County, ND

The radar

The Aberdeen radar (KABR), 59 km from the middle of the area, began a volume at 21:31 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 10, 4:35 PM CDT	TSTM WND DMG	1 E Ellendale, ND	ROOF DAMAGE TO BUILDING AND SHEET METAL MISSING.
Jul 10, 4:42 PM CDT	TSTM WND DMG	Ludden, ND	NUMEROUS TREES AND BRANCHES DOWN IN AND AROUND LUDDEN.

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.

Issued	Product	Office	Lasted
Jul 10, 11:08 AM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jul 10, 2:29 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 9.5 hours before the alert went out and 120 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: 1313 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 909 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.8

Open this sounding in Storm Lab

The text

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

517 
WFUS53 KBIS 102130
TORBIS
NDC021-102200-
/O.NEW.KBIS.TO.W.0042.110710T2130Z-110710T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
430 PM CDT SUN JUL 10 2011

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN DICKEY COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 500 PM CDT

* AT 426 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR ELLENDALE...OR 61 MILES SOUTH OF
  JAMESTOWN...AND MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ELLENDALE...GUELPH AND LUDDEN.

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 4593 9801 4593 9857 4595 9871 4613 9865
      4603 9800 4594 9799
TIME...MOT...LOC 2130Z 283DEG 35KT 4602 9856

$$

HEINERT/AYD

2 follow-up statements

720 
WWUS53 KBIS 102144
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
444 PM CDT SUN JUL 10 2011

NDC021-102200-
/O.CON.KBIS.TO.W.0042.000000T0000Z-110710T2200Z/
DICKEY ND-
444 PM CDT SUN JUL 10 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN DICKEY COUNTY
UNTIL 500 PM CDT...

AT 439 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR ELLENDALE...OR 64 MILES SOUTH OF JAMESTOWN...
MOVING EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  GUELPH AND LUDDEN.

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 4593 9801 4593 9857 4595 9871 4613 9865
      4603 9800 4594 9799
TIME...MOT...LOC 2144Z 283DEG 35KT 4599 9837

$$

HEINERT

461 
WWUS53 KBIS 102155
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
455 PM CDT SUN JUL 10 2011

NDC021-102206-
/O.EXP.KBIS.TO.W.0042.000000T0000Z-110710T2200Z/
DICKEY ND-
455 PM CDT SUN JUL 10 2011

...THE TORNADO WARNING FOR SOUTHEASTERN DICKEY COUNTY WILL EXPIRE AT
500 PM CDT/400 PM MDT/...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

LAT...LON 4593 9801 4593 9857 4595 9871 4613 9865
      4603 9800 4594 9799
TIME...MOT...LOC 2156Z 283DEG 35KT 4596 9821

$$

HEINERT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 10:20 AM CDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger, Morton, Stark	55 min
Jul 10, 10:58 AM CDT	Severe Thunderstorm Warning	BIS	Stark	62 min
Jul 10, 11:09 AM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	66 min
Jul 10, 11:16 AM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	59 min
Jul 10, 11:52 AM CDT	Severe Thunderstorm Warning	BIS	Mercer, Morton, Oliver, Stark	26 min
Jul 10, 12:04 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	37 min
Jul 10, 12:09 PM CDT	Areal Flood Advisory	BIS	Grant, Morton	6 hr
Jul 10, 12:16 PM CDT	Severe Thunderstorm Warning	BIS	Morton	47 min
Jul 10, 12:33 PM CDT	Severe Thunderstorm Warning	BIS	Grant	15 min
Jul 10, 12:39 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, McLean, Oliver	31 min
Jul 10, 1:01 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	29 min
Jul 10, 1:20 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	55 min
Jul 10, 1:30 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Morton	60 min
Jul 10, 1:50 PM CDT	Areal Flood Advisory	BIS	Burleigh, Morton	4 hr
Jul 10, 2:12 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Sioux	63 min
Jul 10, 2:22 PM CDT	Tornado Warning	BIS	Emmons, Sioux	23 min
Jul 10, 2:23 PM CDT	Areal Flood Advisory	BIS	Grant, Sioux	4 hr
Jul 10, 2:27 PM CDT	Tornado Warning	BIS	Emmons, Logan	33 min
Jul 10, 2:30 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Kidder, Logan	30 min
Jul 10, 2:51 PM CDT	Areal Flood Advisory	BIS	Burleigh, Emmons, Kidder, Logan, McIntosh, Stutsman	3 hr
Jul 10, 2:51 PM CDT	Severe Thunderstorm Warning	BIS	Logan, McIntosh	54 min
Jul 10, 2:57 PM CDT	Tornado Warning	BIS	Logan, McIntosh	33 min
Jul 10, 3:26 PM CDT	Tornado Warning	BIS	Dickey, LaMoure, Logan, McIntosh	34 min
Jul 10, 3:35 PM CDT	Severe Thunderstorm Warning	BIS	Dickey, McIntosh	55 min
Jul 10, 3:38 PM CDT	Tornado Warning	BIS	McIntosh	37 min
Jul 10, 3:58 PM CDT	Tornado Warning	BIS	Dickey, LaMoure, McIntosh	32 min
Jul 10, 4:08 PM CDT	Areal Flood Advisory	BIS	Dickey, LaMoure	6 hr
Jul 10, 4:10 PM CDT	Tornado Warning	BIS	Dickey, LaMoure	35 min
Jul 10, 4:29 PM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure	51 min
Jul 10, 4:36 PM CDT	Tornado Warning	BIS	Dickey	24 min
Jul 10, 5:52 PM CDT	Areal Flood Warning	BIS	Grant, Morton	24 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.