Alert archive / Alabama / Wind Advisories in 2017

Wind Advisory 1, NWS Birmingham, AL

January 2, 201711 counties in Alabama

NWS Birmingham, AL issued this wind advisory at Jan 2, 2017, 7:29 PM CST for 11 counties in Alabama. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jan 2, 2017, 7:29 PM CST (01:29 UTC)
Expired
Jan 2, 2017, 11:00 PM CST
In force
4 hr
Issued by
NWS Birmingham, AL

Counties Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Etowah County, AL, Randolph County, AL, St. Clair County, AL, Talladega County, AL, Tallapoosa County, AL

The radar

The Birmingham radar (KBMX), 92 km from the middle of the area, began a volume at 01:30 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 00:00Z, 1.5 hours before the alert went out and 305 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 00:00Z on 2017-01-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2017-01-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 228 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
735 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
228 m²/s²
0-3 km storm-relative helicity
298 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted.

287 
WWUS74 KBMX 030129
NPWBMX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BIRMINGHAM AL
729 PM CST MON JAN 2 2017

...STRONG WINDS ON THE BACKSIDE OF THE RAIN POSSIBLE ACROSS THE
NORTHEAST...

ALZ018>021-026>029-036>038-030500-
/O.NEW.KBMX.WI.Y.0001.170103T0129Z-170103T0500Z/
ETOWAH-CALHOUN-CHEROKEE-CLEBURNE-ST. CLAIR-TALLADEGA-CLAY-
RANDOLPH-COOSA-TALLAPOOSA-CHAMBERS-
INCLUDING THE CITIES OF...GADSDEN...ANNISTON...CENTRE...HEFLIN...
PELL CITY...MOODY...TALLADEGA...SYLACAUGA...ASHLAND...ROANOKE...
ROCKFORD...ALEXANDER CITY...DADEVILLE...VALLEY...LANETT...
LAFAYETTE
729 PM CST MON JAN 2 2017

...WIND ADVISORY IN EFFECT UNTIL 11 PM CST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL 11 PM CST THIS EVENING. 

* TIMING...OF THE STRONGEST WINDS WILL BE ON THE BACKSIDE OF THE
  RAIN SHIELD THROUGH 11 PM.

* WINDS...OF 20 TO 30 MPH WITH GUSTS OF UP TO 40 MPH ARE POSSIBLE,
  ESPECIALLY IN THE HIGHER TERRAIN.

* IMPACTS...OF THE STRONG WINDS COULD BREAK LARGE LIMBS AND CAUSE
  TRAVEL ISSUES FOR LARGER VEHICLES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT WINDS OF GREATER THAN 24 MPH ARE
EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...
ESPECIALLY FOR HIGH PROFILE VEHICLES. USE EXTRA CAUTION.

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 2, 8:29 PM CSTRiver Flood WarningBMXMontgomery47 hr

Nearby

Wind Advisories in Alabama, 2017Every wind advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.