(North Platte Radar)
Code: Select all
208
ACUS11 KWNS 202213
SWOMCD
SPC MCD 202212
NEZ000-SDZ000-210045-
MESOSCALE DISCUSSION 0393
NWS STORM PREDICTION CENTER NORMAN OK
0512 PM CDT TUE APR 20 2004
AREAS AFFECTED...N-CENTRAL AND NERN NEB
CONCERNING...SEVERE THUNDERSTORM POTENTIAL
VALID 202212Z - 210045Z
SMALL CLUSTER OF THUNDERSTORMS MOVING SEWD AT 40-45 KT ACROSS ROCK
AND HOLT COUNTIES IN NEB AT 22Z WILL GRADUALLY TURN ESEWD THROUGH
21/00Z. THREAT OF DAMAGING WINDS AND SEVERE HAIL WILL PERSIST INTO
THIS EVENING AS CONVECTIVE SYSTEM MOVES INTO NERN NEB.
AT 22Z...STEEP LOW-MID LEVEL LAPSE RATE ENVIRONMENT EXISTS ACROSS
NERN NEB JUST SOUTH AND SOUTHWEST OF UPPER LOW CENTERED OVER ERN SD.
COMBINED WITH AMPLE SURFACE HEATING...AN AXIS OF SBCAPE BETWEEN
500-1000 J/KG WILL PERSIST INTO THE EVENING HOURS IN ADVANCE OF
ONGOING CONVECTIVE ACTIVITY. NWLY DEEP-LAYER FLOW AROUND 30 KT
BECOMES MORE WNWLY ACROSS NERN NEB SOUTH OF UPPER LOW CENTER...WHICH
SHOULD RESULT IN A MORE EWD COMPONENT OF CONVECTION THROUGH THIS
EVENING. FORWARD PROPAGATION OF STORMS ASSOCIATED WITH MESOSCALE
COLD POOL WILL CONTINUE THREAT OF WIND GUSTS TO SEVERE LEVELS UNTIL
BOUNDARY LAYER COOLS LATE THIS EVENING. IN ADDITION...THREAT OF HAIL
CONTINUES WITH EMBEDDED STRONGER CORES DURING NEXT 2-3 HOURS GIVEN
STEEP LAPSE RATES AND WBZ HEIGHTS BETWEEN 6-7 KFT...PER RUC
ANALYSIS/FORECAST SOUNDINGS.
..BANACOS.. 04/20/2004
PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...FSD...OAX...GID...LBF...
42899897 42859833 42649735 42329689 41959704 41679722
41609776 41759930 42049951 42779937
