Alert archive / Tennessee / Winter Storm Warnings in 2010

Winter Storm Warning 2, NWS Morristown, TN

February 9, 20107 counties in Tennessee; 7 counties in Virginia

NWS Morristown, TN issued this winter storm warning at Feb 9, 2010, 3:48 PM EST for 7 counties in Tennessee; 7 counties in Virginia. It took effect at Feb 10, 2010, 12:00 AM EST. It was in force for 27 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Feb 9, 2010, 3:48 PM EST (20:48 UTC)
In effect from: Feb 10, 2010, 12:00 AM EST
Expired: Feb 11, 2010, 3:15 AM EST
In force: 27 hr
Issued by: NWS Morristown, TN

Counties Blount County, TN, Carter County, TN, Cocke County, TN, Greene County, TN, Johnson County, TN, Sevier County, TN, Unicoi 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), 74 km from the middle of the area, began a volume at 20:49 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.8 hours before the alert went out and 249 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1005 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 402 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 winter storm warning 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 winter storm warning went out at Feb 9, 3:15 PM EST, 33 minutes earlier.

Area forecast discussion, Feb 9, 3:15 PM EST, 33 minutes before

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Hazardous weather outlook, Feb 9, 4:49 AM EST, 10 hours 59 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
449 AM EST TUE FEB 9 2010

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-101000-
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-
449 AM EST TUE FEB 9 2010 /349 AM CST TUE FEB 9 2010/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH
CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA.

.DAY ONE...TODAY AND TONIGHT

A WINTRY MIX WILL FALL ACROSS PARTS OF THE REGION TODAY...BUT FALL
AS MOSTLY RAIN IN LOWER ELEVATIONS. SNOW SHOWERS AND WINDY
CONDITIONS WILL DEVELOP LATE THIS EVENING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

WINDY CONDITIONS AND ACCUMULATING SNOW SHOWERS WILL LINGER INTO
EARLY THURSDAY MORNING.

FOR MORE DETAILS ON HAZARDOUS WEATHER TODAY THROUGH EARLY THURSDAY
...PLEASE SEE OUR LATEST WINTER WEATHER ADVISORY PRODUCT
(MEMWSWMRX)...AND OUR LATEST HIGH WIND WATCH AND WIND ADVISORY
PRODUCT (MEMNPWMRX).

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED...BUT SNOW OR ICE ACCUMULATION
REPORTS WILL BE VERY HELPFUL TODAY THROUGH THURSDAY.

TG

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 9, 4:08 AM EST	Winter Weather Advisory	MRX	Blount, Campbell, Carter, Claiborne, Cocke, Greene and 11 more	39 hr
Feb 9, 4:25 AM EST	High Wind Watch	MRX	Blount, Carter, Cocke, Greene, Johnson, Sevier and 1 more	12 hr
Feb 9, 4:25 AM EST	Wind Advisory	MRX	Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more	47 hr
Feb 9, 10:26 AM EST	Wind Advisory	MRX	Blount, Carter, Cocke, Greene, Johnson, Sevier and 1 more	6 hr

Nearby

Winter Storm Warnings in Tennessee, 2010 Winter Storm Warnings in Virginia, 2010 Every winter storm warning in 2010

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.