Severe Storm Outlook Narrative (AC)
Issued by NWS

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

717
ACUS11 KWNS 200252
SWOMCD
SPC MCD 200251
OKZ000-KSZ000-TXZ000-200445-

Mesoscale Discussion 0470
NWS Storm Prediction Center Norman OK
0951 PM CDT Sat May 19 2018

Areas affected...Parts of west and northwest TX and southwest to
north-central OK

Concerning...Severe Thunderstorm Watch 108...

Valid 200251Z - 200445Z

The severe weather threat for Severe Thunderstorm Watch 108
continues.

SUMMARY...A severe-weather threat for mainly large hail and damaging
winds will persist for a few more hours (until at least midnight)
across west Texas to western North Texas to southwest Oklahoma,
while the severe threat extending north-northeast into north-central
Oklahoma may be isolated.  WW 109 has been extended in time beyond
03Z, with some areal expansion too.

DISCUSSION...Trends in radar and surface observations showed a
convectively enhanced boundary extending generally westward from
Clay County TX through northern Haskell to Yoakum Counties TX.  A
30-40 kt southerly low-level jet is providing a feed of moderate
instability into and north of this boundary, enhancing lift for
continued thunderstorm development from west through east of KLBB to
near and north of KSPS.  Meanwhile, sporadic strong to severe storms
were developing toward central and north-central OK in vicinity of a
cold front that extended from eastern KS to southwest OK.

Forcing for ascent attendant to low-level warm advection across
northwest TX to southwest OK and along the path of a progressive
shortwave trough moving toward OK is expected to maintain
thunderstorm development through tonight.  Residual moderate
instability and strong effective bulk shear should favor continued
potential for organized severe storms in the short term.

..Peters.. 05/20/2018

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...TSA...ICT...FWD...OUN...SJT...LUB...MAF...

LAT...LON   33860249 33940058 34319979 35329861 36099796 36859748
            37009699 36909627 36479630 35999688 35609751 34599753
            34309744 33899758 33539893 33210001 32940148 33040208
            33340283 33630267 33860249




USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.