Alert archive / Alabama / Special Weather Statements in 2016

Special Weather Statement, NWS Birmingham, AL

August 18, 2016Elmore County, Alabama

NWS Birmingham, AL issued this special weather statement at Aug 18, 2016, 4:33 PM CDT for Elmore County, Alabama. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 18, 2016, 4:33 PM CDT (21:33 UTC)
Expired: Aug 18, 2016, 5:00 PM CDT
In force: 27 min
Issued by: NWS Birmingham, AL

County Elmore County, AL

The radar

The Maxwell AFB radar (KMXX), 30 km from the middle of the area, began a volume at 21:36 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 9.6 hours before the alert went out and 92 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1277 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 972 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 11 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Birmingham, AL wrote its last area forecast discussion before this special weather statement went out at Aug 18, 2:01 PM CDT, 2 hours 32 minutes earlier.

Area forecast discussion, Aug 18, 2:01 PM CDT, 2 hours 32 minutes before

Area Forecast Discussion
National Weather Service Birmingham AL
201 PM CDT THU AUG 18 2016

.DISCUSSION...

An uptick in coverage this afternoon as the upper ridge continues
to weaken over the area and some weak upper lift traverses across
the tennessee valley. Most of this is diurnally aided, however
lingering showers/storms have maintained themselves through the
past couple of evenings, so some isolated storms could very well
continue deep into the evening hours tonight.

Above average rain chances for Friday through Sunday as ample
moisture will work with a digging trough and frontal boundary.
Looks like most locations will see some rainfall through this
period. Drier air behind the boundary will push into the state and
limit any showers to the far southern counties on Monday with dry
conditions taking hold of the area thereafter. Pleasant
temperatures and humidity behind the front considering it is still
August.

88

&&

.AVIATION...
18Z TAF Discussion.

Afternoon satellite and radar shows developing storms primarily over
the north eastern portion of the CWA, near KBHM, KEET, KASN, and
KANB.  This afternoon and early evening day time heating will
instigate scattered thunderstorms for all sites however VFR
conditions will prevail.  Winds will remain light throughout the TAF
period and likely become more variable in the overnight hours.  A
chance of rain returns tomorrow morning, primarily for northern
sites.

92

&&

.FIRE WEATHER...

A hot and humid airmass will remain in place through the rest of
the week and into the weekend, with scattered afternoon and
evening showers and storms each day. Less humid air will make its
way into the state early next week. Critical fire weather
conditions are not expected.

&&

.PRELIMINARY POINT TEMPS/POPS...
Gadsden     72  87  72  88  73 /  30  70  40  60  40
Anniston    73  88  73  88  73 /  30  60  40  50  30
Birmingham  74  88  74  88  75 /  30  60  40  50  30
Tuscaloosa  74  89  74  89  74 /  40  60  40  50  20
Calera      74  89  73  88  74 /  30  60  40  50  30
Auburn      73  90  73  89  73 /  30  40  30  40  20
Montgomery  75  93  75  92  75 /  30  30  30  40  20
Troy        73  92  74  91  73 /  30  20  20  40  20

&&

.BMX WATCHES/WARNINGS/ADVISORIES...
None.

&&

Hazardous weather outlook, Aug 18, 5:33 AM CDT, 11 hours before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
533 AM CDT THU AUG 18 2016

ALZ011>015-017>050-191345-
MARION-LAMAR-FAYETTE-WINSTON-WALKER-BLOUNT-ETOWAH-CALHOUN-CHEROKEE-
CLEBURNE-PICKENS-TUSCALOOSA-JEFFERSON-SHELBY-ST. CLAIR-TALLADEGA-
CLAY-RANDOLPH-SUMTER-GREENE-HALE-PERRY-BIBB-CHILTON-COOSA-TALLAPOOSA-
CHAMBERS-MARENGO-DALLAS-AUTAUGA-LOWNDES-ELMORE-MONTGOMERY-MACON-
BULLOCK-LEE-RUSSELL-PIKE-BARBOUR-
533 AM CDT THU AUG 18 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...OUTLOOK THROUGH TONIGHT.

HEAT INDICES WILL RISE ABOVE 100F MAINLY SOUTH OF I-20 BEGINNING
AROUND MIDDAY. ALONG AND SOUTH OF A LINE FROM DEMOPOLIS TO SELMA
TO PHENIX CITY, HEAT INDICES COULD REACH 105F FOR AN HOUR OR TWO.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Local storm report, Aug 18, 2:49 PM CDT, 1 hour 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
249 PM CDT THU AUG 18 2016

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

0150 PM     TSTM WND DMG     1 SE FORESTDALE         33.57N 86.90W
08/18/2016                   JEFFERSON          AL   TRAINED SPOTTER

            LARGE TREE LIMB FELL BLOCKING A PORTION OF ROBERTA ROAD.
            ESTIMATED 40-50 MPH WINDS. LOCATION APPROXIMATE. TIME
            ESTIMATED BY RADAR.

&&

JH

Special weather statement, Aug 18, 3:02 PM CDT, 1 hour 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
302 PM CDT THU AUG 18 2016

ALZ025-027-035-182045-
CHILTON AL-TALLADEGA AL-SHELBY AL-
302 PM CDT THU AUG 18 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL CHILTON...SOUTHERN
SHELBY AND SOUTHWESTERN TALLADEGA COUNTIES UNTIL 345 PM CDT...

AT 302 PM CDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG
A LINE EXTENDING FROM NEAR AMERICAN VILLAGE TO NEAR HARPERSVILLE.
MOVEMENT WAS NORTH AT 10 MPH.

WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
ALABASTER...SYLACAUGA...CALERA...MONTEVALLO...CHILDERSBURG...COLUMBIA
NA...
JEMISON...WILSONVILLE...TALLADEGA SPRINGS...VINCENT...HARPERSVILLE...
WESTOVER...WILTON...UNIVERSITY OF MONTEVALLO...FAYETTEVILLE...LAY
LAKE...
ALPINE BAY RESORT...SHELBY COUNTY AIRPORT...LOGAN MARTIN DAM AND
AMERICAN VILLAGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD
TO LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3348 8628 3310 8626 3310 8649 3309 8651
      3302 8652 3296 8684 3315 8691 3343 8638
      3340 8638 3341 8635
TIME...MOT...LOC 2002Z 187DEG 8KT 3310 8681 3334 8638

32/DAVIS

Special weather statement, Aug 18, 3:43 PM CDT, 50 minutes before

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Special weather statement, Aug 18, 3:55 PM CDT, 38 minutes before

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Special weather statement, Aug 18, 4:05 PM CDT, 28 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
405 PM CDT THU AUG 18 2016

ALZ024-025-182145-
JEFFERSON AL-SHELBY AL-
405 PM CDT THU AUG 18 2016

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN SHELBY AND SOUTHEASTERN
JEFFERSON COUNTIES UNTIL 445 PM CDT...

AT 404 PM CDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG
A LINE EXTENDING FROM NEAR MAYLENE TO NEAR OAK MOUNTAIN STATE PARK.
MOVEMENT WAS NORTHWEST AT 15 MPH.

WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
HOOVER...VESTAVIA
HILLS...ALABASTER...BESSEMER...PELHAM...HELENA...CHELSEA...
INDIAN SPRINGS VILLAGE...ROSS BRIDGE...MEADOWBROOK...OAK MOUNTAIN
STATE
PARK...HOOVER METROPOLITAN STADIUM...MAYLENE...SHELBY COUNTY
AIRPORT...
PATTON CREEK...RIVERCHASE GALLERIA...OAK MOUNTAIN AMPHITHEATER...
RIVERCHASE...BROOK HIGHLAND AND SAGINAW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD
TO LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3346 8669 3324 8661 3310 8697 3316 8697
      3316 8698 3317 8703 3321 8702 3321 8703
      3325 8703 3325 8706 3328 8707 3328 8709
      3330 8710
TIME...MOT...LOC 2104Z 152DEG 15KT 3319 8695 3328 8674

32/DAVIS

Special weather statement, Aug 18, 4:33 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
433 PM CDT THU AUG 18 2016

ALZ043-182200-
ELMORE AL-
433 PM CDT THU AUG 18 2016

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL ELMORE COUNTY UNTIL 500
PM CDT...

AT 433 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
SANTUCK...OR NEAR WETUMPKA. THIS STORM WAS NEARLY STATIONARY.

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

LOCATIONS IMPACTED INCLUDE...
WETUMPKA...ECLECTIC...SANTUCK...DEXTER...BLUE RIDGE...CLAUD AND
WALLSBORO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3259 8600 3246 8612 3254 8627 3269 8615
TIME...MOT...LOC 2133Z 128DEG 4KT 3257 8614

32/DAVIS

The office that day

Everything else NWS Birmingham, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 18, 12:33 PM CDT	Special Weather Statement	BMX	Blount	27 min
Aug 18, 12:53 PM CDT	Special Weather Statement	BMX	Randolph	37 min
Aug 18, 1:29 PM CDT	Special Weather Statement	BMX	Lee	31 min
Aug 18, 1:31 PM CDT	Special Weather Statement	BMX	St. Clair	44 min
Aug 18, 1:42 PM CDT	Special Weather Statement	BMX	Jefferson	33 min
Aug 18, 1:57 PM CDT	Special Weather Statement	BMX	Clay	33 min
Aug 18, 2:05 PM CDT	Areal Flood Advisory	BMX	Etowah, St. Clair	115 min
Aug 18, 2:07 PM CDT	Special Weather Statement	BMX	Jefferson	38 min
Aug 18, 2:13 PM CDT	Special Weather Statement	BMX	DeKalb	32 min
Aug 18, 2:26 PM CDT	Special Weather Statement	BMX	Coosa	34 min
Aug 18, 2:40 PM CDT	Special Weather Statement	BMX	Cleburne	35 min
Aug 18, 3:02 PM CDT	Special Weather Statement	BMX	Shelby	43 min
Aug 18, 3:43 PM CDT	Special Weather Statement	BMX	Talladega	32 min
Aug 18, 3:55 PM CDT	Special Weather Statement	BMX	Coosa	35 min
Aug 18, 4:05 PM CDT	Special Weather Statement	BMX	Shelby	40 min
Aug 18, 4:22 PM CDT	Areal Flood Advisory	BMX	Shelby	3 hr
Aug 18, 4:50 PM CDT	Special Weather Statement	BMX	Chilton	25 min
Aug 18, 5:33 PM CDT	Areal Flood Advisory	BMX	Jefferson	117 min
Aug 18, 6:13 PM CDT	Special Weather Statement	BMX	Jefferson	32 min
Aug 18, 6:23 PM CDT	Special Weather Statement	BMX	Autauga	52 min
Aug 18, 6:26 PM CDT	Special Weather Statement	BMX	Bibb	49 min
Aug 18, 6:36 PM CDT	Special Weather Statement	BMX	Pickens	24 min
Aug 18, 6:44 PM CDT	Areal Flood Advisory	BMX	Jefferson, Walker	2 hr
Aug 18, 6:45 PM CDT	Special Weather Statement	BMX	Tuscaloosa	30 min

Nearby

Special Weather Statements in Alabama, 2016 Every special weather statement in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.