Alert archive / Tennessee / Wind Advisories in 2024

Wind Advisory 33, NWS Morristown, TN

December 29, 202422 counties in Tennessee; 7 counties in Virginia

NWS Morristown, TN issued this wind advisory at Dec 29, 2024, 2:24 AM EST for 22 counties in Tennessee; 7 counties in Virginia. It took effect at Dec 29, 2024, 9:00 AM EST. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Dec 29, 2024, 2:24 AM EST (07:24 UTC)
In effect from: Dec 29, 2024, 9:00 AM EST
Expired: Dec 29, 2024, 7:00 PM EST
In force: 10 hr
Issued by: NWS Morristown, TN

All 29 counties

Anderson County, TN, Blount County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Knox County, TN, Loudon County, TN, Monroe County, TN, Morgan County, TN, Roane County, TN, Scott County, TN, Sevier County, TN, Sullivan County, TN, Union County, TN, Washington County, TN, City of Bristol, VA, City of Norton, VA, Lee County, VA, Russell County, VA, Scott County, VA, Washington County, VA, Wise County, VA

The radar

The Knoxville radar (KMRX), 17 km from the middle of the area, began a volume at 07:24 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, 7.4 hours before the alert went out and 296 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: 3 J/kg
Mixed-layer CIN: -151 J/kg
Mixed-layer LCL: 738 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 247 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this wind advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Morristown, TN wrote its last area forecast discussion before this wind advisory went out at Dec 29, 12:48 AM EST, 1 hour 36 minutes earlier.

Area forecast discussion, Dec 29, 12:48 AM EST, 1 hour 36 minutes before

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Hazardous weather outlook, Dec 28, 3:21 PM EST, 11 hours 3 minutes before

Hazardous Weather Outlook
National Weather Service Morristown TN
321 PM EST Sat Dec 28 2024

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-292030-
Cherokee-Clay-Scott TN-Campbell-Claiborne-Hancock-Hawkins-
Sullivan-Johnson-Morgan-Anderson-Union-Grainger-Hamblen-
Northwest Cocke-Cocke Smoky Mountains-Northwest Greene-
Southeast Greene-Washington TN-Unicoi-Northwest Carter-
Southeast Carter-Roane-Loudon-Knox-Jefferson-Northwest Blount-
Blount Smoky Mountains-North Sevier-Sevier Smoky Mountains-
Sequatchie-Bledsoe-Rhea-Meigs-McMinn-Northwest Monroe-
Southeast Monroe-Marion-Hamilton-Bradley-West Polk-East Polk-Lee-
Wise-Scott VA-Russell-Washington VA-
321 PM EST Sat Dec 28 2024 /221 PM CST Sat Dec 28 2024/

This Hazardous Weather Outlook is for portions of southwest North
Carolina...east Tennessee and southwest Virginia.

.DAY ONE...This Afternoon and Tonight

A low chance of severe weather exists late tonight and early
Sunday as a line of storms moves through. The primary threat is
damaging wind gusts. A brief tornado can't be ruled out, but
chances are very low. Severe weather will likely be limited to
southeast Tennessee, in the Chattanooga vicinity, and southwest
North Carolina.

Wind gusts up to 80 mph possible in downslope prone areas of the
East Tennessee mountains and adjacent foothills tonight into
Sunday morning.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

All of tonight's threats may continue Sunday morning but should
be starting to weaken.

.SPOTTER INFORMATION STATEMENT...

Spotter reports of severe weather may be needed late tonight and
Sunday morning.

In the hours before

Special weather statement, Dec 29, 1:48 AM EST, 36 minutes before

Special Weather Statement
National Weather Service Morristown TN
148 AM EST Sun Dec 29 2024

TNZ081-082-098-099-290745-
Sequatchie TN-Bledsoe TN-Marion TN-Hamilton TN-
148 AM EST Sun Dec 29 2024

...STRONG THUNDERSTORMS WILL IMPACT SEQUATCHIE...WESTERN BLEDSOE...
MARION AND SOUTHWESTERN HAMILTON COUNTIES THROUGH 245 AM EST/145 AM
CST/...

At 147 AM EST/1247 AM CST/, Doppler radar was tracking strong
thunderstorms along a line extending from near Sewanee to 8 miles
southwest of Section. Movement was northeast at 60 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Chattanooga, Dunlap, Jasper, Signal Mountain, South Pittsburg,
Walden, Whitwell, Kimball, Monteagle, and Fairmount.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3524 8582 3522 8574 3524 8569 3529 8571
      3532 8557 3536 8551 3541 8549 3541 8551
      3543 8554 3549 8554 3553 8560 3555 8546
      3557 8542 3572 8526 3577 8525 3513 8529
      3498 8545 3499 8586 3522 8587
TIME...MOT...LOC 0647Z 213DEG 59KT 3524 8599 3449 8607

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

KRS

The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 29, 1:48 AM EST	Special Weather Statement	MRX	Marion, Sequatchie	57 min
Dec 29, 2:40 AM EST	Special Weather Statement	MRX	Bledsoe, Hamilton, Rhea, Sequatchie	50 min
Dec 29, 5:40 AM EST	Areal Flood Advisory	MRX	Grainger	3 hr
Dec 29, 6:11 AM EST	Areal Flood Advisory	MRX	Monroe, Polk	2 hr
Dec 29, 6:12 AM EST	Special Weather Statement	MRX	Grainger, Hamblen, Hancock, Jefferson	48 min
Dec 29, 6:18 AM EST	Areal Flood Advisory	MRX	Grainger, Knox, Union	3 hr
Dec 29, 6:25 AM EST	Areal Flood Advisory	MRX	Blount, Monroe, Sevier	5 hr
Dec 29, 6:31 AM EST	Areal Flood Advisory	MRX	Blount, Grainger, Hamblen, Jefferson, Knox, Sevier	2 hr
Dec 29, 6:43 AM EST	Flash Flood Warning	MRX	Grainger	3 hr
Dec 29, 6:58 AM EST	Areal Flood Advisory	MRX	Claiborne, Grainger, Union	3 hr
Dec 29, 6:58 AM EST	Special Weather Statement	MRX	Greene, Hancock, Hawkins, Washington	47 min
Dec 29, 7:41 AM EST	Special Weather Statement	MRX	Sullivan, Washington	49 min
Dec 29, 8:10 AM EST	Special Weather Statement	MRX	Johnson	50 min
Dec 29, 9:30 AM EST	River Flood Warning	MRX	Cocke	18 hr
Dec 29, 6:54 AM EST	Areal Flood Advisory	MRX	Cherokee, Clay	2 hr

Nearby

Wind Advisories in Tennessee, 2024 Wind Advisories in Virginia, 2024 Every wind advisory in 2024

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.