Alert archive / Alabama / Wind Advisories in 2021

Wind Advisory 3, NWS Huntsville, AL

May 9, 202110 counties in Alabama; Franklin County, Lincoln County, Moore County, Tennessee

NWS Huntsville, AL issued this wind advisory at May 9, 2021, 3:31 AM CDT for 10 counties in Alabama; Franklin County, Lincoln County, Moore County, Tennessee. It took effect at May 9, 2021, 9:00 AM CDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
May 9, 2021, 3:31 AM CDT (08:31 UTC)
In effect from
May 9, 2021, 9:00 AM CDT
Expired
May 9, 2021, 5:23 PM CDT
In force
8 hr
Issued by
NWS Huntsville, AL

Counties Colbert County, AL, DeKalb County, AL, Franklin County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marshall County, AL, Morgan County, AL, Franklin County, TN, Lincoln County, TN, Moore County, TN

The radar

The Northeast Alabama radar (KHTX), 67 km from the middle of the area, began a volume at 08:31 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, 8.5 hours before the alert went out and 154 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 2021-05-09Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2021-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 105 square meters per square second.19395878Sfc1 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
1439 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
105 m²/s²
0-3 km storm-relative helicity
312 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

680 
WWUS74 KHUN 090831
NPWHUN

URGENT - WEATHER MESSAGE
National Weather Service Huntsville AL
331 AM CDT Sun May 9 2021

ALZ001>010-TNZ076-096-097-092300-
/O.NEW.KHUN.WI.Y.0003.210509T1400Z-210509T2300Z/
Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan-
Marshall-Jackson-DeKalb-Moore-Lincoln-Franklin TN-
Including the cities of Florence, Muscle Shoals, Sheffield, 
Tuscumbia, Russellville, Red Bay, Moulton, Town Creek, Athens, 
Huntsville, Decatur, Albertville, Boaz, Guntersville, Arab, 
Scottsboro, Fort Payne, Rainsville, Lynchburg, Fayetteville, 
Winchester, Sewanee, Decherd, Estill Springs, and Cowan
331 AM CDT Sun May 9 2021

...WIND ADVISORY IN EFFECT FROM 9 AM THIS MORNING TO 6 PM CDT
THIS EVENING...

* WHAT...Southwest winds 15 to 20 mph with gusts up to 35 mph 
  expected.

* WHERE...Portions of north central, northeast and northwest 
  Alabama and southern middle Tennessee.

* WHEN...From 9 AM this morning to 6 PM CDT this evening.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$
1 follow-up statement
499 
WWUS74 KHUN 092223
NPWHUN

URGENT - WEATHER MESSAGE
National Weather Service Huntsville AL
523 PM CDT Sun May 9 2021

ALZ001>010-TNZ076-096-097-092330-
/O.CAN.KHUN.WI.Y.0003.000000T0000Z-210509T2300Z/
Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan-
Marshall-Jackson-DeKalb-Moore-Lincoln-Franklin TN-
Including the cities of Florence, Muscle Shoals, Sheffield, 
Tuscumbia, Russellville, Red Bay, Moulton, Town Creek, Athens, 
Huntsville, Decatur, Albertville, Boaz, Guntersville, Arab, 
Scottsboro, Fort Payne, Rainsville, Lynchburg, Fayetteville, 
Winchester, Sewanee, Decherd, Estill Springs, and Cowan
523 PM CDT Sun May 9 2021

...WIND ADVISORY IS CANCELLED...

Breezy winds across much of southern middle Tennessee into north
Alabama earlier today have now diminished heading into this late 
Sunday afternoon. Therefore, the Wind Advisory has been cancelled
for most of the Tennessee Valley area. Wind gusts around 20 MPH 
though may be possible into the evening hours, as a cold front 
approaches from the west.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 9, 3:45 PM CDTSpecial Weather StatementHUNJackson30 min
May 9, 3:49 PM CDTSpecial Weather StatementHUNMorgan26 min
May 9, 3:53 PM CDTSpecial Weather StatementHUNMadison37 min
May 9, 5:54 PM CDTSpecial Weather StatementHUNCullman36 min

Nearby

Wind Advisories in Alabama, 2021Wind Advisories in Tennessee, 2021Every wind advisory in 2021

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.