Alert archive / Alabama / Special Weather Statements in 2018

Special Weather Statement, NWS Huntsville, AL

August 7, 2018Jackson County, Alabama

NWS Huntsville, AL issued this special weather statement at Aug 7, 2018, 1:40 PM CDT for Jackson County, Alabama. It was in force for 35 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 7, 2018, 1:40 PM CDT (18:40 UTC)
Expired
Aug 7, 2018, 2:15 PM CDT
In force
35 min
Issued by
NWS Huntsville, AL

County Jackson County, AL

The radar

The Northeast Alabama radar (KHTX), 17 km from the middle of the area, began a volume at 18:42 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

Nashville Metro, TN (KBNA), launched 12:00Z, 6.7 hours before the alert went out and 151 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-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2018-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 474 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2018-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
474 J/kg
Mixed-layer CIN
-72 J/kg
Mixed-layer LCL
1264 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
25 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 Huntsville, AL wrote its last area forecast discussion before this special weather statement went out at Aug 7, 12:29 PM CDT, 1 hour 11 minutes earlier.

Area forecast discussion, Aug 7, 12:29 PM CDT, 1 hour 11 minutes before
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Hazardous weather outlook, Aug 7, 12:28 PM CDT, 1 hour 12 minutes before
Hazardous Weather Outlook...UPDATED
National Weather Service Huntsville AL
1228 PM CDT Tue Aug 7 2018

ALZ001>010-016-TNZ076-096-097-081200-
Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan-
Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN-
1228 PM CDT Tue Aug 7 2018

This Hazardous Weather Outlook is for north Alabama and portions of
southern middle Tennessee.

.DAY ONE...This Afternoon and Tonight...

Isolated to scattered thunderstorms are expected to develop this
afternoon. Some thunderstorms may be capable of producing strong wind
gusts and locally heavy downpours.

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

A cold front will move into the region and stall initially, bringing
scattered to numerous shower and thunderstorm activity for Wednesday
through Friday. Some strong thunderstorms capable of producing gusty
winds and locally heavy rainfall are possible each day.

While thunderstorms will remain in the forecast, the coverage of
activity may be a little lower from Saturday through Monday. Some
thunderstorms capable of strong wind gusts could still occur during
this period.

.SPOTTER CALL TO ACTION STATEMENT...

Activation of storm spotters and emergency management personnel is
not anticipated at this time.

In the hours before

Local storm report, Aug 7, 11:55 AM CDT, 1 hour 45 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1155 AM CDT TUE AUG 7 2018

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

0435 PM     TSTM WND DMG     1 NW ATHENS             34.80N 86.97W
08/06/2018                   LIMESTONE          AL   EMERGENCY MNGR

            A TREE WAS REPORTED DOWN ON HOUSTON STREET.

0432 PM     TSTM WND DMG     4 NNW ATHENS            34.84N 86.98W
08/06/2018                   LIMESTONE          AL   EMERGENCY MNGR

            A TREE WAS REPORTED DOWN ON AIRFIELD STREET.

0420 PM     TSTM WND DMG     7 ENE ROGERSVILLE       34.85N 87.16W
08/06/2018                   LIMESTONE          AL   EMERGENCY MNGR

            A TREE WAS REPORTED DOWN ON BARKER ROAD.

0405 PM     TSTM WND DMG     7 WSW VINA              34.34N 88.16W
08/06/2018                   FRANKLIN           AL   EMERGENCY MNGR

            EMA GOT REPORTS OF TREES DOWN ALONG CO ROAD
            11 SOUTHWEST OF VINA.

0340 PM     TSTM WND DMG     2 NNE DECATUR           34.60N 86.97W
08/06/2018                   MORGAN             AL   BROADCAST MEDIA

            LARGE TREE DOWN AT THE CORNER OF GRANT AND
            CHURCH STREET.

0340 PM     HAIL             2 NNE DECATUR           34.60N 86.97W
08/06/2018  E0.88 INCH       MORGAN             AL   BROADCAST MEDIA

            REPORT OF NICKEL SIZE HAIL.

0332 PM     TSTM WND DMG     2 NNE DECATUR           34.60N 86.97W
08/06/2018                   MORGAN             AL   EMERGENCY MNGR

            CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 2
            NNE DECATUR. A TREE WAS REPORTED DOWN ON A
            HOUSE AT THIS LOCATION.

0332 PM     TSTM WND DMG     2 NNW DECATUR           34.60N 87.00W
08/06/2018                   MORGAN             AL   EMERGENCY MNGR

            CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 2
            NNW DECATUR. TREE REPORTED DOWN ON ROAD AT
            THE INTERSECTION OF 7TH AVENUE W AND 1ST
            STREET SW.

0332 PM     TSTM WND DMG     3 N DECATUR             34.61N 86.98W
08/06/2018                   MORGAN             AL   EMERGENCY MNGR

            CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 3
            N DECATUR. TREE REPORTED DOWN ON A HOUSE AT
            THIS LOCATION ON VINE STREET.

0332 PM     TSTM WND DMG     2 NNE DECATUR           34.60N 86.98W
08/06/2018                   MORGAN             AL   EMERGENCY MNGR

            CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 2
            NNE DECATUR. TREE WAS REPORTED DOWN ON THE
            ROAD AT THE INTERSECTION OF JACKSON STREET
            SE AND 8TH AVENUE SE.

0203 PM     TSTM WND GST     2 NNE SCOTTSBORO        34.67N 86.03W
08/06/2018  E40 MPH          JACKSON            AL   EMERGENCY MNGR

            OUTFLOW BOUNDARY KNOCKED DOWN A FEW LIMBS ON
            A COUPLE OF OAK TREES IN SCOTTSBORO. TIME
            ESTIMATED FROM RADAR.

&&
Special weather statement, Aug 7, 1:40 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 3:24 PM CDTSpecial Weather StatementHUNMadison21 min
Aug 7, 4:19 PM CDTSpecial Weather StatementHUNCullman26 min
Aug 7, 4:28 PM CDTSpecial Weather StatementHUNFranklin47 min
Aug 7, 4:45 PM CDTSpecial Weather StatementHUNMarshall45 min
Aug 7, 5:17 PM CDTSpecial Weather StatementHUNMarshall43 min
Aug 7, 5:21 PM CDTSpecial Weather StatementHUNMorgan39 min
Aug 7, 5:30 PM CDTSpecial Weather StatementHUNMadison45 min
Aug 7, 5:33 PM CDTSpecial Weather StatementHUNLimestone42 min
Aug 7, 5:43 PM CDTSpecial Weather StatementHUNLimestone47 min
Aug 7, 5:52 PM CDTSpecial Weather StatementHUNMarshall38 min
Aug 7, 6:09 PM CDTSpecial Weather StatementHUNMadison51 min
Aug 7, 6:17 PM CDTSevere Thunderstorm WarningHUNMadison28 min
Aug 7, 6:27 PM CDTSpecial Weather StatementHUNDeKalb48 min
Aug 7, 6:40 PM CDTSpecial Weather StatementHUNMadison50 min
Aug 7, 6:47 PM CDTSpecial Weather StatementHUNDeKalb43 min

Nearby

Special Weather Statements in Alabama, 2018Every special weather statement in 2018

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.