000
FLUS74 KOUN 042057
AWUOUN

AREA WEATHER UPDATE
NATIONAL WEATHER SERVICE NORMAN OK
350 PM CDT SAT JUN 4 2005

...WARNING DECISION UPDATE...

...THIS WARNING DECISION UPDATE CONCERNS CENTRAL OKLAHOMA...

FIRST ECHO HAS DEVELOPED JUST SOUTH OF CHICKASHA...AND WILL BE 
CLOSELY MONITORED FOR INTENSIFICATION. GIVEN EXTREME INSTABILITY
AND SHEAR PARAMETERS IN PLACE...EXPECT VERY LARGE HAIL WITHIN A 
SHORT TIME AFTER INITIATION...WITH VOLUMETRIC Z VALUES OF 55 DBZ TO 
28-30K FT LIKELY PROMPTING SVR WARNINGS. VOLUMETRIC Z/V WILL ALSO BE CLOSELY 
MONITORED FOR SUPERCELL TRENDS AND POSSIBLE TORNADO WARNINGS. 
LOCATION AND MOVEMENT OF THIS DEVELOPING STORM INDICATES IT COULD 
IMPACT OKC METRO AFTER 5PM...IF IT MAINTAINS ITSELF. 

WE ARE CONCERNED ABOUT POTENTIAL FOR SIGNIFICANT TORNADOES AND 
DAMAGING HAIL...ESPECIALLY NORTH OF INTERSTATE 40.


$$

SMITH

NOTE: THIS PRODUCT IS MEANT TO INCREASE INFORMATION EXCHANGE ON THE 
STORM SCALE.

TERMS DEFINED:

Z = REFLECTIVITY
V = VELOCITY (GROUND- OR STORM-RELATIVE)
VOLUMETRIC Z = REFLECTIVITY AT LOW, MID AND HIGH LEVELS 

VIL = VERTICALLY INTEGRATED LIQUID
TDA = ALGORITHM TO DETECT STRONG CYCLONIC SHEAR
POSH = PROBABILITY OF SEVERE HAIL ALGORITHM
SCIT = STORM CELL IDENTIFICATION AND TRACKING

TBS = THREE-BODY SCATTER = REFLECTIVITY FLARE SIGNATURE FROM HAIL
AP = ANOMALOUS PROPAGATION
MESO = MESOCYCLONE
RFD = REAR FLANK DOWNDRAFT
BWER = BOUNDED WEAK ECHO REGION
MT = MAX STORM TOP
TVS = TORNADIC VORTEX SIGNATURE
LP = LOW PRECIPITATION SUPERCELL
HP = HIGH PRECIPITATION SUPERCELL
GIANT HAIL = HAIL 2 INCHES OR GREATER

RDA = WSR-88D RADAR SITE
VCP = VOLUME COVERAGE PATTERN OF WSR-88D
TDWR = TERMINAL DOPPLER RADAR (LOCATED IN NORTHWEST NORMAN)
POLARIMETRIC RADAR/DUAL POL=SEE: WWW.NSSL.NOAA.GOV/~SCHUUR/RADAR.HTML
ZDR = DIFFERENTIAL REFLECTIVITY
KDP = DIFFERENTIAL PHASE
HCA = POLARIMETRIC HYDROMETEOR CLASSIFICATION ALGORITHM

$$