Alert archive / North Dakota / Mesoscale Discussions in 2012

Mesoscale Discussion 366

March 26, 201217 counties in North Dakota; 12 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Mar 26, 2012, 11:38 PM CDT for 17 counties in North Dakota; 12 counties in South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Mar 26, 2012, 11:38 PM CDT (04:38 UTC)
Expired: Mar 27, 2012, 1:45 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 29 counties

Benson County, ND, Burleigh County, ND, Dickey County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McHenry County, ND, McIntosh County, ND, McLean County, ND, Oliver County, ND, Pierce County, ND, Sheridan County, ND, Stutsman County, ND, Wells County, ND, Beadle County, SD, Brown County, SD, Brule County, SD, Buffalo County, SD, Campbell County, SD, Edmunds County, SD, Faulk County, SD, Hand County, SD, Hyde County, SD, Jerauld County, SD, McPherson County, SD, Spink County, SD

The radar

The Aberdeen radar (KABR), 94 km from the middle of the area, began a volume at 04:37 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.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 4.6 hours before the alert went out and 137 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: 939 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 345 m²/s²
0-3 km storm-relative helicity: 483 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.

793 
ACUS11 KWNS 270438
SWOMCD
SPC MCD 270438 
SDZ000-NDZ000-270645-

MESOSCALE DISCUSSION 0366
NWS STORM PREDICTION CENTER NORMAN OK
1138 PM CDT MON MAR 26 2012

AREAS AFFECTED...PORTIONS CENTRAL ND...CENTRAL/ERN SD.

CONCERNING...SEVERE THUNDERSTORM WATCH 111...

VALID 270438Z - 270645Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 111
CONTINUES.

OVERALL/ORGANIZED SVR THREAT IS DIMINISHING...THOUGH SOME STG GUSTS
ARE POSSIBLE FROM MOST INTENSE CELLS OVER CENTRAL ND.  ADDITIONAL
DEVELOPMENT CANNOT BE RULED OUT IN LOW-LEVEL WAA ZONE E OF
WW...ACROSS ERN DAKOTAS/WRN MN...HOWEVER THIS ACTIVITY IS LIKELY TO
BE ROOTED IN ELEVATED INFLOW LAYER WITH POTENTIAL FOR ISOLATED HAIL.

04Z SFC ANALYSIS SHOWED MAIN LOW HAS MOVED ACROSS MT/ND BORDER TO
SWRN ND.  THIS LOW SHOULD SHIFT ENEWD ACROSS CENTRAL/ERN ND DURING
REMAINDER OVERNIGHT HOURS.  OCCLUDED FRONT ARCHED EWD/SEWD TO
SECONDARY LOW NEAR SD/ND BORDER NNE MBG...WHERE COLD FRONT EXTENDED
SWD BETWEEN ANW-ONL THEN SWWD OVER ERN CO.  COLD-FRONTAL CONVECTION
OVER NEB/SRN SD HAS DISSIPATED BEHIND THAT BOUNDARY.  FRONTAL
SLOPE...AND STRENGTH OF ASSOCIATED LIFT...EACH SHOULD DIMINISH
THROUGH REMAINDER OF TONIGHT FROM SRN SD SWD...AS MID-UPPER WAVE
EJECTS NEWD ACROSS SD/ND.  MEANWHILE INITIAL CLUSTER OF TSTMS THAT
MOVED NNEWD FROM SWRN SD IS MOVING PROGRESSIVELY FARTHER
POLEWARD/REMOVED FROM WARM SECTOR...AND AS SUCH SHOULD BECOME MORE
ELEVATED WITH PROGRESSIVELY LOWER SVR POTENTIAL DURING NEXT 2-3
HOURS.

..EDWARDS.. 03/27/2012

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

ATTN...WFO...FGF...FSD...ABR...BIS...UNR...

LAT...LON   43679967 46200013 47090152 48500142 48569953 47819880
            47539857 47009835 46569817 46019794 44829795 44349819
            43699886 43679967

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 26, 9:17 PM CDT	Mesoscale Discussion	SPC	Burleigh, Emmons, Grant, Hettinger, Kidder, Logan and 4 more	118 min

Nearby

Mesoscale Discussions in North Dakota, 2012 Mesoscale Discussions in South Dakota, 2012 Every 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; radar from the NEXRAD Level II archive.