Severe Thunderstorm Warning 166, NWS Little Rock, AR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LITTLE ROCK AR
1245 PM CDT SUN MAY 24 2015

.AVIATION...
SOUTHERLY FLOW HAS BROUGHT MOISTURE BACK TO ARKANSAS. ATMOSPHERE
WILL CONTINUE TO DESTABILIZE THIS AFTERNOON. THUNDERSTORMS WILL
BECOME MORE NUMEROUS ACROSS THE AREA. SOUTH WINDS WILL BE GUSTY
AND GUST TO 25 KTS OR MORE. EXPECT WIND SHEAR AT LIT. RAIN WILL
CONTINUE TONIGHT AND END TOWARD DAYBREAK. VFR AND MVFR CONDITIONS
ARE EXPECTED THROUGH THE PERIOD.

&&

.PREV DISCUSSION... /ISSUED 651 AM CDT SUN MAY 24 2015/

AVIATION...24/12Z TAF CYCLE

SCTD SHRA/TSRA WL BE NOTED ACRS THE AREA THIS MRNG...ALONG WITH
OCNL STRATUS. THIS WL RESULT IN MAINLY VFR/MVFR CONDS. CONVECTION
WL BCM MORE WIDESPREAD ACRS AR THIS AFTN AND TNGT...WITH CONDS
DETERIORATING. PRIMARILY EXPECT MVFR CONDS BY THAT TIME...WITH IFR
CIGS/VSBYS WHERE STRONGER STORMS OCCUR. BREEZY S/SELY SFC WINDS WL
ALSO BE COMMON THRU MUCH OF THE PD. /44/

PREV DISCUSSION... /ISSUED 443 AM CDT SUN MAY 24 2015/

SHORT TERM...TODAY THROUGH WEDNESDAY NIGHT

SHOWERS AND THUNDERSTORMS THAT BROUGHT WIDESPREAD
RAIN...FLOODING...AND A FEW TORNADOES LAST NIGHT TO OKLAHOMA HAS
CONTINUED ITS SLOW MARCH EASTWARD THROUGH THE OVERNIGHT HOURS. HAVE
BEGUN TO SEE SHOWERS AND THUNDERSTORMS DEVELOP ACROSS THE WESTERN
THIRD OF THE STATE. WRF AND HRRR DISAGREE WITH HOW THIS SYSTEM WILL
EVOLVE OVER THE NEXT EIGHT HOURS OR SO. THE WRF SHOWS THE LINE OF
SHOWERS AND THUNDERSTORMS WEAKENING AROUND MID DAY...BEFORE
REDEVELOPING AFTER THIS EVENING. HOWEVER...AM LEANING TOWARDS THE
HRRR WHICH SHOWS SHOWERS AND THUNDERSTORMS CONTINUING TO FALL
THROUGH THE DAY...AS PRECIPITATION SLOWLY PUSHES TO THE EAST. WITH
HIGH PRECIPTABLE WATER VALUES AROUND THE STATE...THESE TRAINING
STORMS WILL BE EFFICIENT RAIN MAKERS WITH RAIN RATES TOPPING OUT AT
1.5 INCHES PER HOUR.

ON TOP OF EVERYTHING...A BREEZY DAY CAN BE EXPECTED TODAY...WITH
SUSTAINED SE WINDS OF 15 TO 25 MPH AND GUSTS UP TO 35 MPH POSSIBLE.
DID GO AHEAD AND ISSUE A LAKE WIND ADVISORY THROUGH THIS EVENING.

SEVERE WEATHER REMAINS A POSSIBILITY TODAY AS WELL. MIDLEVEL LAPSE
RATES ARE NOT FANTASTIC...HOWEVER CAPE VALUES WILL BE IN EXCESS OF
1000 J PER KG. WITH WINDS OUT OF THE SE AT THE SURFACE...HELICITY
VALUES WILL BE HIGH ENOUGH TO SUPPORT A FEW TORNADOES.

BUT BY FAR THE GREATEST THREAT WILL BE THE POTENTIAL FOR FLOODING.
OVER THE PAST TWO WEEKS...PORTIONS OF WESTERN ARKANSAS HAVE SEEN
BETWEEN 10 TO 14 INCHES OF RAIN...WHICH IS ROUGHLY 4 TO 6 TIMES
NORMAL. COMBINE THIS WITH DEEP SOUTHERLY FLOW AND PRECIPITABLE WATER
VALUES BETWEEN 1.5 TO OVER 2 INCHES...WHICH IS 1 TO 2 STANDARD
DEVIATIONS ABOVE NORMAL...AND HEAVY RAIN AND LIFE THREATENING FLASH
FLOODING WILL BE LIKELY.

CONTINUES TO LOOK LIKE TWO ROUNDS OF HEAVY RAIN...WITH THE FIRST
ROUND SUNDAY WITH TWO TO FOUR INCHES POSSIBLE WITH THE HEAVIEST RAIN
ACROSS WESTERN ARKANSAS. DO EXPECT THERE WILL BE A LULL IN THE
PRECIPITATION DURING THE DAY ON MONDAY BEFORE THE SECOND ROUND OF
HEAVY RAIN DEVELOPS MONDAY NIGHT THROUGH MID DAY TUESDAY. MODELS
HAVE BEEN CONSISTENT IN SHOWING A PERIOD OF VERY HEAVY RAIN MONDAY
NIGHT. AGAIN...DO EXPECT THAT ANOTHER ROUND OF TWO TO FOUR INCHES
WILL BE POSSIBLE MONDAY NIGHT. AS A RESULT DID GO AND ISSUE AND
EXTEND THE FLASH FLOOD WATCH TO THE ENTIRE AREA AND GO THROUGH 18Z
TUESDAY.

LONG TERM...THURSDAY THROUGH SATURDAY

MODELS INDC A WEAK UPR RDG WL SET UP ALONG THE MS RVR VALLEY LATE IN
THE WEEK. WITH PLENTY OF LOW LVL MOISTURE RMNG IN PLACE ACRS THE MID
SOUTH...SCTD MAINLY DIURNAL CONVECTION CAN BE EXPECTED EACH DAY. A
STRONGER UPR LVL STORM SYS IS PROGGED TO AFFECT THE LATE IN THE PD.
KEPT POPS IN CHC CAT THIS FAR IN ADVANCE AS CHGS IN TIMING/STRENGTH
ARE LIKELY WITH THIS SYS WITH LATER MODEL RUNS.

&&

.PRELIMINARY POINT TEMPS/POPS...
BATESVILLE AR     67  78  65  79 /  80  50  80  60
CAMDEN AR         68  82  69  84 /  80  90  90  60
HARRISON AR       65  79  62  79 /  80  40  80  60
HOT SPRINGS AR    67  81  68  82 /  80  80  90  60
LITTLE ROCK   AR  68  82  67  82 /  80  60  90  60
MONTICELLO AR     70  83  69  82 /  80  90  90  80
MOUNT IDA AR      68  78  67  79 /  80  80  80  60
MOUNTAIN HOME AR  65  80  64  79 /  80  30  80  60
NEWPORT AR        69  80  67  80 /  80  60  80  70
PINE BLUFF AR     68  81  69  81 /  80  80  90  70
RUSSELLVILLE AR   65  82  66  80 /  80  60  80  60
SEARCY AR         66  80  68  78 /  80  50  80  70
STUTTGART AR      69  82  69  81 /  80  60  80  70
&&

.LZK WATCHES/WARNINGS/ADVISORIES...
LAKE WIND ADVISORY UNTIL 9 PM CDT THIS EVENING FOR ARKANSAS-
BAXTER-BOONE-BRADLEY-CALHOUN-CLARK-CLEBURNE-CLEVELAND-CONWAY-
DALLAS-DESHA-DREW-FAULKNER-FULTON-GARLAND-GRANT-HOT SPRING-
INDEPENDENCE-IZARD-JACKSON-JEFFERSON-JOHNSON-LINCOLN-LOGAN-
LONOKE-MARION-MONROE-MONTGOMERY-NEWTON-OUACHITA-PERRY-PIKE-POLK-
POPE-PRAIRIE-PULASKI-SALINE-SCOTT-SEARCY-SHARP-STONE-VAN BUREN-
WHITE-WOODRUFF-YELL.

FLASH FLOOD WATCH THROUGH TUESDAY AFTERNOON FOR ARKANSAS-BAXTER-
BOONE-BRADLEY-CALHOUN-CLARK-CLEBURNE-CLEVELAND-CONWAY-DALLAS-
DESHA-DREW-FAULKNER-FULTON-GARLAND-GRANT-HOT SPRING-INDEPENDENCE-
IZARD-JACKSON-JEFFERSON-JOHNSON-LINCOLN-LOGAN-LONOKE-MARION-
MONROE-MONTGOMERY-NEWTON-OUACHITA-PERRY-PIKE-POLK-POPE-PRAIRIE-
PULASKI-SALINE-SCOTT-SEARCY-SHARP-STONE-VAN BUREN-WHITE-WOODRUFF-
YELL.

&&

AVIATION...51

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE LITTLE ROCK AR
105 PM CDT SUN MAY 24 2015

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-251000-
ARKANSAS-BAXTER-BOONE-BRADLEY-CALHOUN-CLARK-CLEBURNE-CLEVELAND-
CONWAY-DALLAS-DESHA-DREW-FAULKNER-FULTON-GARLAND-GRANT-HOT SPRING-
INDEPENDENCE-IZARD-JACKSON-JEFFERSON-JOHNSON-LINCOLN-LOGAN-LONOKE-
MARION-MONROE-MONTGOMERY-NEWTON-OUACHITA-PERRY-PIKE-POLK-POPE-
PRAIRIE-PULASKI-SALINE-SCOTT-SEARCY-SHARP-STONE-VAN BUREN-WHITE-
WOODRUFF-YELL-
105 PM CDT SUN MAY 24 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR A LARGE PART OF ARKANSAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SHOWER AND THUNDERSTORM CHANCES WILL BE ON THE INCREASE ACROSS
ARKANSAS THIS AFTERNOON AND TONIGHT. THERE IS A SLIGHT RISK FOR
SEVERE STORMS...WITH DAMAGING WINDS THE PRIMARY THREAT. ISOLATED
TORNADOES CANNOT BE RULED OUT AS WELL. A TORNADO WATCH IS IN EFFECT
FOR MUCH OF ARKANSAS THROUGH 7 PM.

LOCALLY HEAVY RAINFALL WILL ALSO BE POSSIBLE...LEADING TO AN
INCREASED LIKELIHOOD OF FLASH FLOODING. A FLASH FLOOD WATCH IS NOW
EFFECT FOR THE AREA THROUGH TUESDAY AFTERNOON.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

UNSETTLED WEATHER CONDITIONS WILL CONTINUE THROUGH TUESDAY AS
ANOTHER UPPER LEVEL STORM SYSTEM AFFECTS THE REGION. AS A RESULT...
AN ADDITIONAL ROUND OF SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS
ARKANSAS MONDAY NIGHT AND TUESDAY. SOME STRONG AND SEVERE STORMS
WILL AGAIN BE POSSIBLE...ALONG WITH HEAVY RAINFALL. THE FLASH FLOOD
WATCH REMAINS IN EFFECT THROUGH MIDDAY TUESDAY.

DUE TO THE RECENT HEAVY RAINFALL...IT WILL NOT TAKE MUCH ADDITIONAL
RAINFALL TO CAUSE FLASH FLOODING...AS WELL AS INCREASE THE LEVELS OF
AREA RIVERS. ARKANSANS ARE REMINDED TO MONITOR THE LATEST FORECASTS
THE NEXT FEW DAYS CONCERNING THIS DEVELOPING SITUATION.

UNSETTLED WEATHER CONDITIONS WILL CONTINUE THROUGH THE REMAINDER OF
THE WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON AND EARLY
TONIGHT.

&&

VISIT NWS LITTLE ROCK ON THE WEB. GO TO HTTP://WEATHER.GOV AND
CLICK ON CENTRAL ARKANSAS.

44/51

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PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
447 PM CDT SUN MAY 24 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0443 PM     TSTM WND GST     VILONIA                 35.08N 92.21W
05/24/2015  E60 MPH          FAULKNER           AR   TRAINED SPOTTER

            STORM SPOTTER REPORT WINDS FROM 50 TO 60 MPH. AT THIS
            TIME NO DAMAGE SEEN.

&&

59

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
459 PM CDT SUN MAY 24 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0435 PM     TSTM WND DMG     2 W HAMLET              35.08N 92.35W
05/24/2015                   FAULKNER           AR   AMATEUR RADIO

            POWERPOLE SNAPPED AND BLOCKING TRAFFIC ON HIGHWAY 64.

&&

226

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
501 PM CDT SUN MAY 24 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0400 PM     TSTM WND DMG     2 NW ALEXANDER          34.65N 92.47W
05/24/2015                   SALINE             AR   SOCIAL MEDIA

            LARGE TREE UPROOTED NEAR MIDLAND ROAD.

&&

226