Hail in Alabama, August 18, 2016

Area Forecast Discussion...UPDATED
National Weather Service Huntsville AL
1224 PM CDT THU AUG 18 2016

.UPDATE...
For 18Z TAFs.

&&

.DISCUSSION...
(Issued 1030 AM CDT THU AUG 18 2016)
Only a shower or two lingers from the batch of convection that went
through the TN Valley this morning due to a shortwave. Temps in
southern middle TN and NE AL still feel the effects of that
convection due to the rain cooled air and lingering cloud cover with
temps ranging from the lower 70s to the lower 80s. With less cloud
cover farther west, temps currently sit in the mid 80s.

The rain is not over for today though. As ridge of high pressure
that is still anchored across the region begins to slowly weaken,
disturbances will glide along the northwest periphery. This will be
our main source of lift for additional scattered showers and
thunderstorms across the forecast area today combined with leftover
outflow boundaries from this morning. Due to a current lull in
activity as previously mentioned, have adjusted POP trends leading
into this afternoon. Visible satellite shows cloud cover starting to
return to NW AL which will help keep the warming trend at bay
compared to earlier this morning. However will keep an eye on the
trends and adjust as necessary.

JMS

&&

.AVIATION...
For 18Z TAFs: Sporadic areas of shra/tsra have begun to develop in
response to daytime heating. Generally xpct this trend to continue
into the afternoon period, with the KHSV terminal having the higher
prob of impact. Near this terminal, reduced cigs/vis are possible
with some of the heavier precip. Activity should diminish some going
into the evening hrs, with predom mid level cigs in place. Another
upper wave from the w is then xpcted to approach the area early Fri
morning, with the higher prob mainly near the KMSL terminal.

09

&&

.HUN Watches/Warnings/Advisories...
AL...NONE.
TN...NONE.
&&

For more information please visit our website
at weather.gov/huntsville.

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HUNTSVILLE AL
150 PM CDT THU AUG 18 2016

ALZ001>010-016-TNZ076-096-097-191015-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DE KALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
150 PM CDT THU AUG 18 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PORTIONS OF
SOUTHERN MIDDLE TENNESSEE.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

SCATTERED THUNDERSTORMS REMAIN POSSIBLE THROUGH THE REMAINDER OF THE
AFTERNOON PERIOD AND INTO THE EVENING AND OVERNIGHT HOURS. LOCALLY
HEAVY DOWNPOURS AND BRIEF GUSTY WINDS ARE POSSIBLE WITH SOME OF THE
STRONGER STORMS. MINOR FLOODING IS POSSIBLE WITH AREAS THAT RECEIVE
MULTIPLE EPISODES OF HEAVY RAINFALL.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

SCATTERED TO NUMEROUS THUNDERSTORMS ARE EXPECTED DURING THE PERIOD
FROM FRIDAY THROUGH SUNDAY AS SEVERAL UPPER LEVEL DISTURBANCES TRACK
ACROSS THE REGION AND INTERACT WITH A VERY MOIST AIRMASS. LOCALLY
HEAVY RAINFALL AND BRIEF GUSTY WINDS ARE AGAIN POSSIBLE WITH SOME OF
THESE STORMS. A COLD FRONT IS THEN EXPECTED TO PUSH SOUTHEASTWARD
AND BRING AND AN END TO THE STORMS FROM NORTHWEST TO SOUTHEAST BY
SUNDAY EVENING.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS
NOT ANTICIPATED AT THIS TIME.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
118 PM CDT THU AUG 18 2016

ALZ008-010-181845-
MARSHALL AL-DE KALB AL-
118 PM CDT THU AUG 18 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN DEKALB AND
SOUTHEASTERN MARSHALL COUNTIES UNTIL 145 PM CDT...

AT 117 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
BOAZ...MOVING NORTHEAST AT 15 MPH.

PEA SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
ALBERTVILLE...BOAZ...CROSSVILLE...GERALDINE...DOUGLAS...KILPATRICK...
WHITON...ARONA...CHIGGER HILL AND LATHAMVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

STRONG GUSTY WINDS WILL BE CAPABLE OF KNOCKING DOWN SMALL TREE LIMBS
ALONG WITH OTHER SMALL UNSECURED ITEMS. SEEK SAFE SHELTER UNTIL THIS
STORM HAS PASSED.

&&

LAT...LON 3417 8632 3443 8601 3423 8597 3420 8604
      3420 8611 3418 8612 3418 8619 3412 8627
TIME...MOT...LOC 1817Z 234DEG 12KT 3419 8616

09

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
159 PM CDT THU AUG 18 2016

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

0147 PM     FLASH FLOOD      NW DECATUR              34.61N 86.99W
08/18/2016                   MORGAN             AL   EMERGENCY MNGR

            PEOPLE STRANDED IN THEIR VEHICLES OUTSIDE MORGAN COUNTY
            COURTHOUSE. WATER ABOUT 3 FEET DEEP AND RISING.

&&

AMIN

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
246 PM CDT THU AUG 18 2016

ALZ010-182015-
DE KALB AL-
246 PM CDT THU AUG 18 2016

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL DEKALB COUNTY UNTIL
315 PM CDT...

AT 246 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
FORT PAYNE...MOVING NORTHEAST AT 15 MPH.

PEA SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
FORT PAYNE...VALLEY HEAD...HAMMONDVILLE...MENTONE...
ADAMSBURG AND DESOTO STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

STRONG GUSTY WINDS WILL BE CAPABLE OF KNOCKING DOWN SMALL TREE LIMBS
ALONG WITH OTHER SMALL UNSECURED ITEMS. SEEK SAFE SHELTER UNTIL THIS
STORM HAS PASSED.

VERY HEAVY RAINFALL IS ALSO OCCURRING WITH THIS STORM AND MAY LEAD TO
LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3450 8555 3450 8556 3449 8556 3448 8558
      3447 8557 3447 8558 3445 8558 3439 8567
      3449 8579 3474 8561 3458 8552 3453 8551
TIME...MOT...LOC 1946Z 224DEG 12KT 3448 8568

09