Alert archive / Alabama / Special Weather Statements in 2017

Special Weather Statement, NWS Birmingham, AL

September 19, 2017Macon County, Alabama

NWS Birmingham, AL issued this special weather statement at Sep 19, 2017, 7:43 PM CDT for Macon County, Alabama. It was in force for 32 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: Sep 19, 2017, 7:43 PM CDT (00:43 UTC)
Expired: Sep 19, 2017, 8:15 PM CDT
In force: 32 min
Issued by: NWS Birmingham, AL

County Macon County, AL

The radar

The Maxwell AFB radar (KMXX), 26 km from the middle of the area, began a volume at 00:45 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 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 Sep 19, 6:07 PM CDT, 1 hour 36 minutes earlier.

Area forecast discussion, Sep 19, 6:07 PM CDT, 1 hour 36 minutes before

Area Forecast Discussion
National Weather Service Birmingham AL
607 PM CDT Tue Sep 19 2017

.UPDATE...
For 00Z Aviation.

&&

.SHORT TERM...
Through Tonight.

Scattered to numerous showers and storms have developed this
afternoon across much of Central Alabama. Initial development this
morning was aided by a weak upper level shortwave moving eastward
in the nearly zonal flow aloft at 500mb. CAPE of 2500 to 3000 J/KG
and PWATs of 1.6 to 1.8 inches have aided in convective
development, especially across the northern half of Central
Alabama. Storms have been absent across eastern Alabama and
western Georgia, as a pocket of dry air is currently in place
based on GOES-16 Total PWAT product, and also the lack of cumulus
development on visible satellite. That dry air will eventually
erode as we go into the late afternoon and overnight, with rain
chances expected to be at least scattered in nature. Elsewhere,
likely rain chances will last through the rest of the afternoon
for locations roughly along and north of the I-59 corridor.

A large outflow boundary from previous strong storms in north
Alabama is currently moving southward through Winston, Walker,
Cullman, and Blount Counties. This boundary will help trigger
additional widespread storms as we go into the afternoon with
some of those being on the strong side. Gusty winds up to 40mph,
frequent cloud to ground lightning, and torrential rains can be
expected as these storms move southeastward. As is the case with
any summertime convection, we'll expect storms to decrease in
coverage and intensity fairly quickly with the loss of daytime
heating. Still, if the current cluster of storms in our northern
counties holds together there could still be decent coverage
between 6pm and 9pm tonight before diminishing.

56/GDG

.LONG TERM...
Wednesday through Tuesday.

The upper-level pattern as depicted by the GFS and ECMWF for
midweek and into the weekend has remained fairly consistent for
the past few days. A ridge forming over the Ohio Valley and Great
Lakes is still expected to trap a portion of an upper-level
trough over the Appalachians and cause this feature to move
westward across the Deep South. However, both models are
indicating a reduction in moisture quality when compared to
previous runs. Rain chances on Wednesday and Thursday have been
reduced from 40-50% to 30% mainly for the northern half of the
forecast area with northerly mid-level flow expected to cause the
advection of relatively drier air. The higher POPs will remain in
place across our southern half with models depicting PWAT values
greater than 1.5 inches.

Scattered showers and storms should continue on Friday and
Saturday as the upper-level low becomes centered over Alabama.
Sunday through Tuesday appear drier as the upper-low moves to our
west with drier air in its wake.

87/Grantham

&&

.AVIATION...
00Z TAF Discussion.

Scattered showers and thunderstorms are still making their way
through Central AL this evening. For the most part, the TAF sites
will likely only see VCHS for the next few hours. After that, VFR
conditions through the evening into early overnight hours. Winds
light, becoming calm overnight, which could lead to patchy fog
across most TAF sites beginning 8-10z. I'm not convinced,based on
guidance, just how low the VIS will be. For now, have put 4SM in
the forecast for a few hours during the morning. I wouldn't be
surprised to see some areas drop below that, but confidence isn't
high enough to include in the TAF. By 14z, expect conditions to
improve back to VFR through the rest of the day.

25/Owen

&&

.FIRE WEATHER...

Scattered showers and storms and storms are expected today across
much of the area. A similar pattern will continue for the next
several days. There are no fire weather concerns.

&&

.PRELIMINARY POINT TEMPS/POPS...
Gadsden     67  87  67  88  67 /  20  30  20  30  20
Anniston    68  87  69  87  67 /  50  30  20  30  20
Birmingham  70  88  70  88  69 /  40  30  20  30  20
Tuscaloosa  71  90  71  91  70 /  30  30  20  30  20
Calera      70  88  70  88  69 /  60  30  20  30  20
Auburn      70  87  69  88  69 /  60  40  20  30  20
Montgomery  72  90  71  91  71 /  60  40  20  40  20
Troy        70  89  69  89  69 /  40  40  20  40  20

&&

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

&&

Hazardous weather outlook, Sep 19, 4:18 AM CDT, 15 hours 25 minutes before

Hazardous Weather Outlook
National Weather Service Birmingham AL
418 AM CDT Tue Sep 19 2017

ALZ011>015-017>050-201230-
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-
418 AM CDT Tue Sep 19 2017

This Hazardous Weather Outlook is for the counties served by the
National Weather Service office in Birmingham.

.DAY ONE...Outlook through Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

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, Sep 19, 6:37 PM CDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
637 PM CDT TUE SEP 19 2017

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

0457 PM     TSTM WND DMG     2 SSE CHOCCOLOCCO       33.64N 85.69W
09/19/2017                   CALHOUN            AL   PUBLIC

            A FEW LARGE BRANCHES DOWNED ALONG RIDDLE
            FARM ROAD. TIME APPROXIMATED.

&&

Local storm report, Sep 19, 6:41 PM CDT, 1 hour 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
641 PM CDT TUE SEP 19 2017

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

0406 PM     TSTM WND DMG     4 S NEELY HENRY DAM     33.72N 86.05W
09/19/2017                   CALHOUN            AL   EMERGENCY MNGR

            TREE DOWNED AT MUDD STREET AND SULPHER
            SPRINGS ROAD. TIME ESTIMATED.

&&

Local storm report, Sep 19, 6:44 PM CDT, 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
644 PM CDT TUE SEP 19 2017

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

0459 PM     TSTM WND DMG     1 SE CHOCCOLOCCO        33.64N 85.69W
09/19/2017                   CALHOUN            AL   EMERGENCY MNGR

            TREE DOWNED ON DOWNING MILL ROAD.

&&

Local storm report, Sep 19, 6:46 PM CDT, 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
646 PM CDT TUE SEP 19 2017

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

0457 PM     TSTM WND DMG     2 S CHOCCOLOCCO         33.63N 85.71W
09/19/2017                   CALHOUN            AL   EMERGENCY MNGR

            TREE DOWNED ALONG HIGHWAY 78. TIME
            ESTIMATED.

&&

Local storm report, Sep 19, 6:47 PM CDT, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
647 PM CDT TUE SEP 19 2017

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

0500 PM     TSTM WND DMG     2 E CHOCCOLOCCO         33.66N 85.66W
09/19/2017                   CALHOUN            AL   EMERGENCY MNGR

            TREE DOWNED ALONG HIGHWAY 9. TIME ESTIMATED.

&&

Local storm report, Sep 19, 6:48 PM CDT, 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
648 PM CDT TUE SEP 19 2017

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

0457 PM     TSTM WND DMG     2 SSE CHOCCOLOCCO       33.64N 85.69W
09/19/2017                   CALHOUN            AL   EMERGENCY MNGR

            TREE DOWNED AT RIDDLE FARM ROAD AND OLD
            DOWNING MILL ROAD. TIME ESTIMATED.

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 19, 7:35 PM CDT	Special Weather Statement	BMX	Hale	25 min
Sep 19, 10:58 PM CDT	Dense Fog Advisory	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 24 more	11 hr

Nearby

Special Weather Statements in Alabama, 2017 Every special weather statement in 2017

Sources

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