MD 0687 CONCERNING TORNADO WATCH 191… FOR MUCH OF CENTRAL NEBRASKA
MESOSCALE DISCUSSION 0687
NWS STORM PREDICTION CENTER NORMAN OK
0926 PM CDT SUN MAY 22 2016
AREAS AFFECTED...MUCH OF CENTRAL NEBRASKA
CONCERNING...TORNADO WATCH 191...
VALID 230226Z - 230400Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 191 CONTINUES.
SUMMARY...A NEW SEVERE-WEATHER WATCH IS BEING CONSIDERED FOR THE
NEBRASKA COUNTIES THAT CURRENTLY RESIDE WITHIN WW 191...AS THE
THREAT FOR STRONG TO SEVERE STORMS IS EXPECTED TO PERSIST BEYOND THE
CURRENT EXPIRATION TIME OF 03Z. THE ENVIRONMENT ACROSS THE SD
COUNTIES WITHIN WW 191 HAS BEEN STABILIZED...SUGGESTING THE SEVERE
WEATHER THREAT WILL REMAIN QUITE LOW THROUGH TONIGHT.
DISCUSSION...TRENDS IN IR SATELLITE IMAGERY INDICATED CONTINUED
CLOUD-TOP COOLING ATTENDANT TO THE ONGOING BAND OF STRONG TO SEVERE
STORMS EXTENDING FROM SOUTHEAST LYMAN AND GREGORY COUNTIES SD TO
SOUTHERN CHERRY COUNTY NEB. NEW STORMS HAVE CONTINUED TO DEVELOP
ALONG THE SOUTHWESTERN FLANK OF THIS STORM ACTIVITY IN CHERRY COUNTY
AS FORCING FOR DEEP-LAYER ASCENT INCREASES WITH THE APPROACH OF THE
SOUTHERN EXTENT OF A WY SHORTWAVE TROUGH AND AS AN ATTENDANT COLD
FRONT MOVES INTO CENTRAL NEB. A 50-KT SOUTHERLY LLJ PER VWP DATA AT
LBF/HSI IS MAINTAINING A FEED OF MODERATE INSTABILITY /MLCAPE OF
2000-3000 J PER KG/ INTO THE SOUTHWEST/SOUTH FLANKS OF THIS TSTM
COMPLEX. THIS LLJ SHOULD REMAIN SLY THROUGH 06Z AND THEN VEER TO
SOUTHWESTERLY...SUCH THAT NEW STORMS WILL CONTINUE TO DEVELOP AND
POSE A THREAT FOR HAIL AND DAMAGING WINDS.
..PETERS/EDWARDS.. 05/23/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...GID...LBF...UNR...BOU...
LAT...LON 40700078 41070244 42530240 42920215 43010029 43499954
42689958 41829962 41239932 40799957 40700078
from SPC Mesoscale Discussions http://1.usa.gov/1jKoS9L
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