Alert archive / Nebraska / Mesoscale Discussions in 2016

Mesoscale Discussion 796

May 30, 2016Cheyenne County, Kiowa County, Kit Carson County, Colorado; 13 counties in Kansas; 27 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 30, 2016, 6:05 PM MDT for Cheyenne County, Kiowa County, Kit Carson County, Colorado; 13 counties in Kansas; 27 counties in Nebraska. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: May 30, 2016, 6:05 PM MDT (00:05 UTC)
Expired: May 30, 2016, 7:30 PM MDT
In force: 85 min
Issued by: the Storm Prediction Center

All 43 counties

Cheyenne County, CO, Kiowa County, CO, Kit Carson County, CO, Cheyenne County, KS, Decatur County, KS, Gove County, KS, Greeley County, KS, Logan County, KS, Norton County, KS, Rawlins County, KS, Scott County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Wichita County, KS, Arthur County, NE, Blaine County, NE, Boyd County, NE, Brown County, NE, Chase County, NE, Cherry County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Holt County, NE, Hooker County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Perkins County, NE, Red Willow County, NE, Rock County, NE, Thomas County, NE

The radar

The North Platte radar (KLNX), 142 km from the middle of the area, began a volume at 00:04 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.1 hours before the alert went out and 78 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: 1852 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1911 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

796 
ACUS11 KWNS 310005
SWOMCD
SPC MCD 310005 
SDZ000-NEZ000-KSZ000-COZ000-310130-

MESOSCALE DISCUSSION 0796
NWS STORM PREDICTION CENTER NORMAN OK
0705 PM CDT MON MAY 30 2016

AREAS AFFECTED...PORTIONS OF CNTRL/WRN NEB...NWRN KS...ERN CO

CONCERNING...SEVERE THUNDERSTORM WATCH 232...

VALID 310005Z - 310130Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 232
CONTINUES.

SUMMARY...A RELATIVELY ISOLATED SEVERE WIND/HAIL RISK CONTINUES
ACROSS THE VALID PORTION OF WW 232.

DISCUSSION...AT 00Z...THREE PRIMARY AREAS OF CONVECTION WERE ONGOING
ACROSS WW 232. ACROSS NRN NEB...A LOOSELY ORGANIZED CLUSTER WAS
DRAPED ACROSS CHERRY COUNTY...WITH A LEADING CELL E OF THE LINE
MOVING N OF AINSWORTH WITH AN ATTENDANT HAIL/WIND RISK. ACROSS SWRN
NEB INTO FAR NWRN KS...SOME UPSCALE GROWTH WAS EVIDENT...WITH A
SMALL BOWING SEGMENT NOTED APPROACHING NORTH PLATTE WITH AN
ATTENDANT THREAT OF LOCALLY DAMAGING WINDS. FURTHER SOUTH...RECENT
INTENSIFICATION HAS OCCURRED ACROSS KIOWA COUNTY CO AS ONGOING
CONVECTION ENCOUNTERS A MORE UNSTABLE ENVIRONMENT. 

THE SEVERE THREAT SHOULD PERSIST FOR AT LEAST ANOTHER 1-2
HOURS...GIVEN THE MODERATELY UNSTABLE ENVIRONMENT IN PLACE
DOWNSTREAM OF THE ONGOING ACTIVITY. STORMS ARE EXPECTED TO REMAIN
ONLY LOOSELY ORGANIZED...GIVEN RELATIVELY WEAK LOW-MIDLEVEL FLOW
NOTED ON 00Z LBF SOUNDING AND LNX/GLD VWP DATA...BUT SOME LARGE HAIL
AND LOCALLY DAMAGING WINDS WILL BE POSSIBLE. LATER THIS EVENING...AN
INCREASING LOW-LEVEL JET WILL HELP TO SUSTAIN CONVECTION...BUT THE
SEVERE THREAT SHOULD BEGIN TO DECREASE AS AVAILABLE INSTABILITY
BECOMES LARGELY ELEVATED.

..DEAN.. 05/31/2016

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

ATTN...WFO...FSD...GID...LBF...DDC...GLD...PUB...BOU...

LAT...LON   38290340 40530192 41150159 42380210 42940177 42949999
            42989833 38290062 38290340

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 30, 7:59 PM MDT	Mesoscale Discussion	SPC	Decatur, Gove, Graham, Greeley, Lane, Logan and 10 more	91 min

Nearby

Mesoscale Discussions in Nebraska, 2016 Mesoscale Discussions in Kansas, 2016 Mesoscale Discussions in Colorado, 2016 Every mesoscale discussion in 2016

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.