MD 0465 CONCERNING TORNADO WATCH 108… FOR PORTIONS OF CNTRL/ERN KS AND SRN NEB
MESOSCALE DISCUSSION 0465
NWS STORM PREDICTION CENTER NORMAN OK
0632 PM CDT TUE APR 26 2016
AREAS AFFECTED...PORTIONS OF CNTRL/ERN KS AND SRN NEB
CONCERNING...TORNADO WATCH 108...
VALID 262332Z - 270030Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 108 CONTINUES.
SUMMARY...A THREAT FOR VERY LARGE HAIL...DAMAGING WINDS...AND
ISOLATED TORNADOES CONTINUES ACROSS WW 108.
DISCUSSION...23Z OBJECTIVE ANALYSIS DEPICTS A 996 MB SFC LOW OVER
CNTRL KS...WITH A COMPOSITE DRYLINE/COLD FRONT EXTENDING SWD ACROSS
S-CNTRL KS INTO NWRN OK. THUNDERSTORMS ACROSS THE MCD AREA HAVE HAD
A TENDENCY TO GROW UPSCALE INTO SHORT CLUSTERS/LINE SEGMENTS OVER
THE PAST SEVERAL HOURS. THIS IS LIKELY DUE TO A VEER-BACK SIGNATURE
PRESENT IN THE VWP AT LOW TO MID LEVELS FROM KICT. REGARDLESS...
STRONG INSTABILITY REMAINS PRESENT ACROSS PORTIONS OF THE WATCH
AREA. WITH EFFECTIVE BULK SHEAR VALUES AND STEEP MID-LEVEL LAPSE
RATES MORE THAN SUFFICIENT TO SUPPORT SUPERCELL STRUCTURES EMBEDDED
WITHIN THE ONGOING LINE SEGMENTS...THE THREAT FOR VERY LARGE HAIL
AND DAMAGING WINDS CONTINUES. AN ISOLATED TORNADO THREAT ALSO
REMAINS ALONG AND S OF AN OUTFLOW BOUNDARY FROM EARLIER CONVECTION
THAT IS LOCATED OVER NERN KS...AS EFFECTIVE SRH AROUND 200-250 M2/S2
IS PRESENT ACROSS THE MCD AREA. HOWEVER...ONGOING UNFAVORABLE
CONVECTIVE MODES MAY TEMPER THE TORNADO THREAT SOMEWHAT.
..GLEASON.. 04/26/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...SGF...EAX...OAX...TOP...ICT...GID...DDC...GLD...
LAT...LON 37629503 37029502 37039838 39119853 39119961 40029960
40029920 40659918 40709872 40709874 40709695 40519607
40049596 40039575 39679574 39659551 39439554 39429514
39019514 38989501 37629503
from SPC Mesoscale Discussions http://1.usa.gov/1qRJJP5
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