SPC MD 1666

MD 1666 CONCERNING SEVERE THUNDERSTORM WATCH 485… FOR NRN AND CNTRL OK…SERN AND SCNTRL KS


MESOSCALE DISCUSSION 1666
NWS STORM PREDICTION CENTER NORMAN OK
0318 AM CDT THU AUG 08 2013

AREAS AFFECTED...NRN AND CNTRL OK...SERN AND SCNTRL KS

CONCERNING...SEVERE THUNDERSTORM WATCH 485...

VALID 080818Z - 080945Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 485
CONTINUES.

SUMMARY...AN ISOLATED SEVERE THREAT IS EXPECTED TO CONTINUE OVER THE
NEXT FEW HOURS. WIND DAMAGE AND HAIL WILL BE THE PRIMARY THREATS. WW
ISSUANCE COULD BECOME NECESSARY DOWNSTREAM FROM WW 485 IF THE LINE
CAN REMAIN ORGANIZED EARLY THIS MORNING.

DISCUSSION...A BOWING LINE-SEGMENT FROM NEAR PRATT KS SSEWD TO NEAR
ENID OK IS LOCATED ALONG A GRADIENT OF MODERATE INSTABILITY
EXTENDING EWD ACROSS NRN OK. AHEAD OF THE LINE...SBCAPE IS ESTIMATED
IN THE 1000 TO 1500 J/KG RANGE ACROSS MUCH OF SCNTRL AND SERN KS. IN
ADDITION...THE LINE IS BEING SUPPORTED BY THE EXIT REGION OF A JET
NEAR 700 MB. AS THE LINE MOVES NEWD...SFC DEWPOINTS IN THE LOWER 70S
F ALONG WITH 30-35 KT OF 0-6 KM SHEAR EVIDENT ON REGIONAL WSR-88D
VWPS...COULD BE ENOUGH FOR A CONTINUED WIND DAMAGE THREAT. A FEW
STORMS COULD ALSO BECOME SEVERE EWD ACROSS NERN OK TO NEAR THE MO-AR
STATE-LINE WHERE WARM AIR ADVECTION IS STRONG AND MODERATE
INSTABILITY IS ALSO PRESENT.

..BROYLES/CORFIDI.. 08/08/2013

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

ATTN...WFO...SGF...TSA...TOP...ICT...OUN...DDC...

LAT...LON   37929862 37609823 36879764 35889750 35429751 35239714
            36279544 37519503 38039533 38579632 38419773 37929862

via SPC Forecast Products http://www.spc.noaa.gov/products/md/md1666.html