Alert archive / Alabama / High Wind Warnings in 2007

High Wind Warning 1, NWS Birmingham, AL

December 20, 20075 counties in Alabama

NWS Birmingham, AL issued this high wind warning at Dec 20, 2007, 4:34 PM CST for 5 counties in Alabama. It was in force for 86 min. 10 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Dec 20, 2007, 4:34 PM CST (22:34 UTC)
Expired: Dec 20, 2007, 6:00 PM CST
In force: 86 min
Issued by: NWS Birmingham, AL

Counties Bibb County, AL, Etowah County, AL, Jefferson County, AL, Shelby County, AL, St. Clair County, AL

The radar

The Birmingham radar (KBMX), 41 km from the middle of the area, began a volume at 22:36 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.

What was reported inside it

Time	Report	Where	Remark
Dec 20, 4:45 PM CST	NON-TSTM WND DMG	Hueytown, AL	GRAVITY WAVE WIND DAMAGE...IN A 2 MILE RADIUS AREA IN THE HUEYTOWN COMMUNITY NUMEROUS TREES AND POWERLINES DOWN.
Dec 20, 5:10 PM CST	NON-TSTM WND DMG	5 N Calera, AL	NUMEROUS REPORTS OF TREES DOWN ACROSS THE AREA.
Dec 20, 5:10 PM CST	NON-TSTM WND DMG	Calera, AL	GRAVITY WAVE WIND DAMAGE RESULTED IN NUMEROUS TREES REPORTED DOWN ACROSS AREA.
Dec 20, 5:30 PM CST	TSTM WND DMG	Birmingham, AL	GRAVITY WAVE WIND DAMAGE, WEST JEFFERSON, AND CENTERPOINT. NUMEROUS TREES AND POWERLINES DOWN ACROSS THE COUNTY.
Dec 20, 5:30 PM CST	NON-TSTM WND DMG	Alabaster, AL	GRAVITY WAVE WIND DAMAGE RESULTED IN NUMEROUS POWER OUTAGES IN HELENA...ALABASTER...AND PELHAM.
Dec 20, 5:30 PM CST	NON-TSTM WND DMG	Birmingham, AL	NUMEROUS TREES AND POWERLINES WERE BLOWN DOWN ACROSS THE COUNTY FROM WEST JEFFERSON TO AT LEAST CENTERPOINT.
Dec 20, 5:30 PM CST	NON-TSTM WND DMG	Pelham, AL	GRAVITY WAVE WIND DAMGAE RESULTED IN AWNING OF SHELL GAS STATION ON HIGHWAY 31 BLOWN OFF.
Dec 20, 5:44 PM CST	NON-TSTM WND DMG	Gadsden, AL	GRAVITY WAVE WIND DAMAGE, WIDESPREAD POWERLINES DOWN THROUGHOUT COUNTY
Dec 20, 5:44 PM CST	NON-TSTM WND DMG	Gadsden, AL	WIDESPREAD POWERLINES DOWN THROUGHOUT THE COUNTY. UPDATED AT THIS TIME, 21/1935UTC. ETOWAW EMA REPORTS, FOLLOWING AN ALABAMA POWER SUMMARY, MANY DOWNED DEAD TREES AND LIMBS CAUSED WIDESPREAD POWERS OUTAGES ACROSS THE COUNTY INCLUDING RAINBOW CITY, HOKES BLUFF,
Dec 20, 6:00 PM CST	NON-TSTM WND DMG	Springville, AL	A FEW TREES WERE BLOWN DOWN COUNTYWIDE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.6 hours before the alert went out and 41 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: 15 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 535 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS74 KBMX 202234
NPWBMX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BIRMINGHAM AL
434 PM CST THU DEC 20 2007


ALZ018-024>026-034-210000-
/O.NEW.KBMX.HW.W.0001.071220T2234Z-071221T0000Z/
ETOWAH-JEFFERSON-SHELBY-ST. CLAIR-BIBB-
INCLUDING THE CITIES OF...GADSDEN...BIRMINGHAM...HOOVER...
COLUMBIANA...PELHAM...ALABASTER...PELL CITY...MOODY...CENTREVILLE
434 PM CST THU DEC 20 2007

...HIGH WIND WARNING IN EFFECT UNTIL 6 PM CST THIS AFTERNOON...

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT UNTIL 6 PM CST THIS AFTERNOON. 

A HIGH WIND WARNING MEANS A HAZARDOUS HIGH WIND EVENT IS EXPECTED
OR OCCURRING. SUSTAINED WIND SPEEDS OF AT LEAST 40 MPH OR GUSTS
OF 58 MPH OR MORE CAN LEAD TO PROPERTY DAMAGE.

$$

Nearby

High Wind Warnings in Alabama, 2007 Every high wind warning in 2007

Sources

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