Alert archive / North Dakota / Severe Thunderstorm Watches in 2012

Severe Thunderstorm Watch 365

June 9, 201211 counties in North Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jun 9, 2012, 3:07 AM CDT for 11 counties in North Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jun 9, 2012, 3:07 AM CDT (08:07 UTC)
Expired: Jun 9, 2012, 9:00 AM CDT
In force: 6 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1.5 in
Strongest gust expected: 60 kt

Counties Bottineau County, ND, Burke County, ND, Divide County, ND, McHenry County, ND, McKenzie County, ND, Mountrail County, ND, Pierce County, ND, Renville County, ND, Rolette County, ND, Ward County, ND, Williams County, ND

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 20%
One or more EF2 to EF5 tornadoes: 5%
Ten or more severe wind reports: 30%
One or more gusts of 65 knots or more: 10%
Ten or more severe hail reports: 30%
One or more hailstones of 2 inches or more: 5%
Six or more combined severe hail and wind reports: 60%

Warnings issued inside it

9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 9, 3:55 AM CDT	Flash Flood Warning	BIS	Divide, McKenzie, Williams	4 hr
Jun 9, 3:59 AM CDT	Severe Thunderstorm Warning	BIS	Burke, Divide, McKenzie, Mountrail, Williams	61 min
Jun 9, 4:36 AM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie, Mountrail	24 min
Jun 9, 4:58 AM CDT	Flash Flood Warning	BIS	Burke, McKenzie, McLean, Mountrail, Ward	4 hr
Jun 9, 4:59 AM CDT	Severe Thunderstorm Warning	BIS	Burke, Dunn, McKenzie, Mountrail, Renville, Ward	61 min
Jun 9, 5:50 AM CDT	Flash Flood Warning	BIS	Bottineau, Renville, Ward	4 hr
Jun 9, 5:54 AM CDT	Severe Thunderstorm Warning	BIS	Bottineau, McHenry, Renville, Ward	66 min
Jun 9, 6:46 AM CDT	Severe Thunderstorm Warning	BIS	Bottineau, McHenry, Pierce, Rolette	74 min
Jun 9, 6:51 AM CDT	Flash Flood Warning	BIS	Bottineau, McHenry, Pierce, Rolette	4 hr

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 8.1 hours before the alert went out and 246 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1638 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 179 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.

698 
WWUS20 KWNS 090807
SEL5
SPC WW 090807
NDZ000-091400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 365
NWS STORM PREDICTION CENTER NORMAN OK
300 AM CDT SAT JUN 9 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

       WESTERN AND NORTHERN NORTH DAKOTA

EFFECTIVE THIS SATURDAY MORNING FROM 300 AM UNTIL 900 AM CDT.

HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80
STATUTE MILES EAST AND WEST OF A LINE FROM 75 MILES NORTHWEST OF
MINOT NORTH DAKOTA TO 45 MILES WEST OF GARRISON NORTH DAKOTA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU5).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 364...

DISCUSSION...NE MT TSTM CLUSTER WITH EMBEDDED SUSTAINED
STORMS/OCCASIONAL SUPERCELLS EXPECTED TO CONTINUE NEWD INTO
ND...WITH PERHAPS SOME ADDITIONAL DEVELOPMENT ON ITS ERN FLANK.
AREA OBSERVATIONS...FCST SOUNDINGS...AND CONTINUED ENE ADVANCE OF
ASSOCIATED UPR TROUGH SUGGEST LIKELIHOOD FOR SVR HAIL / LOCALLY DMGG
WINDS DESPITE POSSIBILITY THAT THE CONVECTION MAY BECOME SLIGHTLY
ELEVATED WITH TIME.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 22035.


...CORFIDI

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 9, 2:50 AM CDT	Mesoscale Discussion	SPC	Burke, Divide, McKenzie, Mountrail, Renville, Ward and 1 more	55 min
Jun 9, 6:48 AM CDT	Mesoscale Discussion	SPC	Benson, Cavalier, Eddy, Grand Forks, McHenry, Nelson and 7 more	87 min
Jun 9, 3:53 PM CDT	Mesoscale Discussion	SPC	Barnes, Benson, Cavalier, Dickey, Eddy, Foster and 17 more	97 min

Nearby

Severe Thunderstorm Watches in North Dakota, 2012 Every severe thunderstorm watch in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.