000
FLUS74 KFWD 282104
AWUFWD

AREA WEATHER UPDATE
NATIONAL WEATHER SERVICE FORT WORTH TX
403 PM CDT FRI APR 28 2006

...WARNING DECISION UPDATE FOR NORTH TEXAS...

JOHNSON COUNTY STORM HAS STARTED TO LOSE ITS VOL-Z STRUCTURE AS IT 
MOVES FARTHER NORTH OF THE WARM FRONT. HAIL/WIND POTENTIAL 
DECREASING WITH THIS STORM AND POTENTIAL CURRENTLY REMAINS LOW WITH 
STORMS ALONG/NORTH OF I-20 CORRIDOR. LOCALLY HEAVY RAINFALL MAY MAKE 
FOR HAZARDOUS TRAVELING CONDITIONS.

ATTENTION SHIFTING TO WEST AND SOUTH...WITH STRONG/SVR STORMS FROM 
NEAR VERNON...TO WEST OF ABILENE...TO SOUTH OF SAN ANGELO. SPC 
MESOANALYSIS SUGGESTS CAPES 1500-2000 J/KG JUST WEST OF OUR CWA. 
DEEP LAYER SHEAR OF 55-60 KNOTS CONTINUES OVER THIS AREA.  0-1 KM 
WIND PROFILES SUGGEST LOW-LEVEL ROTATION MAY BE POSSIBLE...THUS WILL 
NEED TO WATCH CLOSELY. WILL NEED TO MONITOR STORM MOTIONS AND 
EARLIER PRECIP AREAS FOR POSSIBLE TRAIN ECHOES AND INCREASED FLOOD 
POTENTIAL.

WOODALL

NOTE:  THIS IS AN EXPERIMENTAL PRODUCT MEANT TO INCREASE INFORMATION 
EXCHANGE ON THE STORM SCALE DURING WARNING OPERATIONS, AND MAY NOT 
BE ISSUED DURING EVERY WARNING EVENT.

TERMS DEFINED:
3BS = THREE-BODY SCATTER (REFLECTIVITY FLARE SIGNATURE FROM HAIL)
AP = ANOMALOUS PROPAGATION
BWER = BOUNDED WEAK ECHO REGION
CAPE = CONVECTIVE AVAILABLE POTENTIAL ENERGY (INSTABILITY)
CIN = CONVECTIVE INHIBITION (RELATED TO CAP STRENGTH)
CWA = COUNTY WARNING AREA
GIANT HAIL = HAIL 2 INCHES IN DIAMETER OR LARGER
HP = HIGH-PRECIPITATION SUPERCELL
LP = LOW-PRECIPITATION SUPERCELL
MCS = MESOSCALE CONVECTIVE SYSTEM (ORGANIZED THUNDERSTORM SYSTEM)
MESO = MESOCYCLONE
MT = MAX STORM TOP
POSH = PROBABILITY OF SEVERE HAIL ALGORITHM
RDA = WSR-88D RADAR SITE
RFD = REAR FLANK DOWNDRAFT
SCIT = STORM CELL IDENTIFICATION AND TRACKING ALGORITHM
SREH = STORM-RELATIVE ENVIRONMENTAL HELICITY
SRM = STORM-RELATIVE RADIAL VELOCITY
TDA = ALGORITHM TO DETECT STRONG CYCLONIC SHEAR
TVS = TORNADIC VORTEX SIGNATURE
V = GROUND-RELATIVE RADIAL VELOCITY
VCP = VOLUME COVERAGE PATTERN OF WSR-88D
VIL = VERTICALLY INTEGRATED LIQUID
VOL-Z = REFLECTIVITY AT LOW...MID...AND HIGH LEVELS
Z = REFLECTIVITY

$$