Alert archive / North Dakota / Mesoscale Discussions in 2012

Mesoscale Discussion 1104

June 9, 20127 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 9, 2012, 2:50 AM CDT for 7 counties in North Dakota. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
Jun 9, 2012, 2:50 AM CDT (07:50 UTC)
Expired
Jun 9, 2012, 3:45 AM CDT
In force
55 min
Issued by
the Storm Prediction Center
Chance of a watch
60%

Counties Burke County, ND, Divide County, ND, McKenzie County, ND, Mountrail County, ND, Renville County, ND, Ward County, ND, Williams County, ND

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 7.8 hours before the alert went out and 206 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 00:00Z on 2012-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 00:00Z on 2012-06-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 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
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.

028 
ACUS11 KWNS 090750
SWOMCD
SPC MCD 090750 
NDZ000-MTZ000-090845-

MESOSCALE DISCUSSION 1104
NWS STORM PREDICTION CENTER NORMAN OK
0250 AM CDT SAT JUN 09 2012

AREAS AFFECTED...NWRN ND

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 

VALID 090750Z - 090845Z

PROBABILITY OF WATCH ISSUANCE...60 PERCENT

SUMMARY...A FEW STRONG TO SEVERE WIND GUSTS ARE LIKELY ALONG WITH
SOME HAIL.

DISCUSSION...A LINE OF STORMS CONTINUES TO HOLD TOGETHER OVER NERN
MT...AND WILL ENTER NWRN ND PRIOR TO 09Z. ALTHOUGH INSTABILITY IS
ELEVATED AND MARGINAL OVER ND...IT IS WITHIN A STEEP LAPSE RATE
ENVIRONMENT ALOFT...AND SHEAR IS STRONG. THEREFORE...THE ONGOING
CONVECTIVE SYSTEM MAY REMAIN STRONG TO SEVERE FOR SEVERAL MORE
HOURS...ALTHOUGH A DOWNWARD TREND IN INTENSITY MAY OCCUR WITH TIME.

..JEWELL/CORFIDI.. 06/09/2012

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...BIS...GGW...

LAT...LON   47440403 49010406 48990092 48360103 48040130 47750240
            47440403

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 9, 3:07 AM CDTSevere Thunderstorm WatchSPCBottineau, Burke, Divide, McHenry, McKenzie, Mountrail and 5 more6 hr
Jun 9, 6:48 AM CDTMesoscale DiscussionSPCBenson, Cavalier, Eddy, Grand Forks, McHenry, Nelson and 7 more87 min
Jun 9, 3:53 PM CDTMesoscale DiscussionSPCBarnes, Benson, Cavalier, Dickey, Eddy, Foster and 17 more97 min

Nearby

Mesoscale Discussions in North Dakota, 2012Every mesoscale discussion 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.