Alert archive / North Dakota / Tornado Warnings in 2013

Tornado Warning 9, NWS Bismarck, ND

July 13, 2013Williams County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jul 13, 2013, 4:54 PM CDT for Williams County, North Dakota. It was in force for 36 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: Jul 13, 2013, 4:54 PM CDT (21:54 UTC)
Expired: Jul 13, 2013, 5:30 PM CDT
In force: 36 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

County Williams County, ND

The radar

The Minot AFB radar (KMBX), 202 km from the middle of the area, began a volume at 21:56 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 13, 4:55 PM CDT	FUNNEL CLOUD	1 Nw Williston, ND

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 13, 3:47 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 9.9 hours before the alert went out and 223 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: 66 J/kg
Mixed-layer CIN: -237 J/kg
Mixed-layer LCL: 2000 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 272 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.

295 
WFUS53 KBIS 132154
TORBIS
NDC105-132230-
/O.NEW.KBIS.TO.W.0009.130713T2154Z-130713T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
454 PM CDT SAT JUL 13 2013

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL WILLIAMS COUNTY IN NORTHWEST NORTH DAKOTA

* UNTIL 530 PM CDT

* AT 449 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 10 MILES NORTHWEST OF WILLISTON....AND MOVING
  EAST AT 25 MPH.

  HAZARD...TORNADO AND HALF DOLLAR SIZE HAIL.

  SOURCE...RADAR INDICATED ROTATION.

  IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO
           ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS
           WILL BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS
           LIKELY.

* LOCATIONS IMPACTED INCLUDE...
  SPRING BROOK AND EPPING.

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 4848 10342 4816 10327 4816 10389 4833 10395
TIME...MOT...LOC 2154Z 259DEG 21KT 4824 10377

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

AYD

2 follow-up statements

500 
WWUS53 KBIS 132158
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
458 PM CDT SAT JUL 13 2013

NDC105-132230-
/O.CON.KBIS.TO.W.0009.000000T0000Z-130713T2230Z/
WILLIAMS ND-
458 PM CDT SAT JUL 13 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL WILLIAMS COUNTY
UNTIL 530 PM CDT...

AT 456 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 8 MILES NORTHWEST OF WILLISTON...MOVING EAST AT 25 MPH.

HAZARD...TORNADO AND HALF DOLLAR SIZE HAIL.

SOURCE...WEATHER SPOTTERS REPORTED FUNNEL CLOUD.

IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO
         ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS WILL
         BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS LIKELY.

LOCATIONS IMPACTED INCLUDE...
SPRING BROOK AND EPPING.

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 4848 10342 4816 10327 4816 10389 4833 10395
TIME...MOT...LOC 2158Z 260DEG 24KT 4824 10372

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

AYD

394 
WWUS53 KBIS 132212
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
512 PM CDT SAT JUL 13 2013

NDC105-132230-
/O.CON.KBIS.TO.W.0009.000000T0000Z-130713T2230Z/
WILLIAMS ND-
512 PM CDT SAT JUL 13 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL WILLIAMS COUNTY
UNTIL 530 PM CDT...

AT 510 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 5 MILES WEST OF SPRING BROOK...OR 7 MILES NORTH OF
WILLISTON...MOVING EAST AT 30 MPH.

HAZARD...TORNADO AND HALF DOLLAR SIZE HAIL.

SOURCE...RADAR INDICATED ROTATION.

IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO
         ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS WILL
         BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS LIKELY.

LOCATIONS IMPACTED INCLUDE...
SPRING BROOK AND EPPING.

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 4834 10390 4848 10342 4816 10327 4816 10382
TIME...MOT...LOC 2212Z 261DEG 26KT 4825 10355

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

AYD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 4:44 PM CDT	Severe Thunderstorm Warning	BIS	Williams	46 min
Jul 13, 4:49 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	41 min
Jul 13, 5:24 PM CDT	Severe Thunderstorm Warning	BIS	McKenzie	51 min
Jul 13, 5:29 PM CDT	Severe Thunderstorm Warning	BIS	Divide, Williams	46 min
Jul 13, 6:09 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie	51 min
Jul 13, 6:13 PM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide, Mountrail, Williams	47 min
Jul 13, 6:48 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, McKenzie	57 min

Nearby

Tornado Warnings in North Dakota, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.