Alert archive / Tennessee / High Wind Watches in 2019

High Wind Watch 1, NWS Morristown, TN

January 18, 20195 counties in Tennessee

NWS Morristown, TN issued this high wind watch at Jan 18, 2019, 10:44 AM EST for 5 counties in Tennessee. It took effect at Jan 19, 2019, 7:00 AM EST. It was in force for .

The area

The counties it named.

The facts

Issued
Jan 18, 2019, 10:44 AM EST (15:44 UTC)
In effect from
Jan 19, 2019, 7:00 AM EST
Expired
Jan 18, 2019, 3:04 PM EST
In force
Issued by
NWS Morristown, TN

Counties Blount County, TN, Cocke County, TN, Greene County, TN, Monroe County, TN, Sevier County, TN

The radar

The Knoxville radar (KMRX), 42 km from the middle of the area, began a volume at 15:46 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, 3.7 hours before the alert went out and 278 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 2019-01-18Temperature 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 12:00Z on 2019-01-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 97 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
541 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
97 m²/s²
0-3 km storm-relative helicity
90 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 high wind watch 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 high wind watch went out at Jan 18, 10:25 AM EST, 19 minutes earlier.

Area forecast discussion, Jan 18, 10:25 AM EST, 19 minutes before
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Hazardous weather outlook, Jan 18, 10:20 AM EST, 24 minutes before
Hazardous Weather Outlook
National Weather Service Morristown TN
1020 AM EST Fri Jan 18 2019

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-191530-
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-NW 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-Russell-Washington-
1020 AM EST Fri Jan 18 2019 /920 AM CST Fri Jan 18 2019/

This Hazardous Weather Outlook is for portions of Southwest North
Carolina...East Tennessee and Southwest Virginia.

.DAY ONE...Today and Tonight

Patchy dense fog will reduce visibilities to below one mile in a
few locations through noon. Please exercise extra caution while
driving this morning.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

...High Wind Watch for the Mountains and Adjacent Foothills for
Saturday...

A strong low pressure system will affect the area Saturday and
Sunday. Ahead of this system, high winds will be possible across
the mountains and foothills on Saturday. Southerly winds of 25 to
40 mph with gusts to 65 mph are possible.

There will be a chance of thunderstorms Saturday afternoon and
evening, and some storms could produce strong wind gusts and
locally heavy rainfall. Much colder air will build into the area
late Saturday night and Sunday, bringing a potential for light
snow accumulations, mainly in the mountains and Southwest
Virginia. Bitterly cold temperatures and brisk northwest winds may
produce low wind chill values on Sunday night and Monday morning,
mainly in the higher terrain.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed on Saturday.

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 18, 5:30 AM ESTDense Fog AdvisoryMRXAnderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more5 hr
Jan 18, 3:04 PM ESTHigh Wind WarningMRXBlount, Cocke, Greene, Monroe, Sevier30 hr
Jan 18, 3:04 PM ESTWind AdvisoryMRXCarter, Johnson, Polk, Unicoi30 hr

Nearby

High Wind Watches in Tennessee, 2019Every high wind watch in 2019

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.