Alert archive / Virginia / Special Weather Statements in 2016

Special Weather Statement, NWS Morristown, TN

August 29, 2016Lee County, Virginia

NWS Morristown, TN issued this special weather statement at Aug 29, 2016, 4:12 PM EDT for Lee County, Virginia. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 29, 2016, 4:12 PM EDT (20:12 UTC)
Expired
Aug 29, 2016, 5:00 PM EDT
In force
48 min
Issued by
NWS Morristown, TN

County Lee County, VA

The radar

The Knoxville radar (KMRX), 66 km from the middle of the area, began a volume at 20:11 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, 8.2 hours before the alert went out and 297 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, Greensboro/Hi Pt, NC at 12:00Z on 2016-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 joules per kilogram.LCLLFCEL10008507005003002001001 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, Greensboro/Hi Pt, NC at 12:00Z on 2016-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 square meters per square second.1939Sfc1 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
12 J/kg
Mixed-layer CIN
-327 J/kg
Mixed-layer LCL
1064 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
65 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 29, 2:56 PM EDT, 1 hour 16 minutes earlier.

Area forecast discussion, Aug 29, 2:56 PM EDT, 1 hour 16 minutes before
Area Forecast Discussion
National Weather Service Morristown TN
256 PM EDT MON AUG 29 2016

.SHORT TERM...(Tonight and Tuesday)...low level NE flow will
continue through tonight, keeping drier air in place overhead.
Despite clear skies, the drier air will limit fog formation early
tomorrow. Locations that see rain this afternoon/evening will have
a better chance of some reduced visibilities tomorrow morning.
Tomorrow will be another warm day with highs pressure overhead and
temperatures climbing into the upper 80s to lower 90s. Clouds will
increase over the eastern tier of the forecast area late Tuesday,
and a few scattered showers and thunderstorms are possible during
the evening hours.

.LONG TERM...(Tuesday night through Saturday)...High pressure will
slowly weaken and move southwest...with an upper level trough and
associated low pressure moving east through the Ohio Valley.
Wednesday...there is enough instability for a few scattered showers
and thunderstorms to develop...though expect the highest area of
coverage to be in NE TN and along the higher elevations in east TN.
Enough dry air is available Wednesday afternoon to keep any
thunderstorms below severe criteria.

Thursday...a frontal boundary will swing through the area. Models
fairly consistent with bringing the boundary through late afternoon
and early evening. Models disagree...however...on how much moisture
and lift will be present with this front. Have gone with chance
scattered showers and thunderstorms through early evening. Winds are
20 kts or less throughout the low and mid levels...with PW values
around 1.5 through the afternoon. Could expect locally heavy rain
and maybe some gusty downburst winds. Otherwise...not expecting
anything too severe with Thursday's storms.

Friday through Monday...temperatures will drop in to the 80's across
most of the area as NW flow sets up behind the front. An upper level
ridge settles over the region with high pressure...mostly clear
skies...and dry weather expected. Temperatures are expected to
remain in the 80's to lower 90's until the beginning of the next
work week as low level flow brings warm Gulf air back in to the
area.

&&

.PRELIMINARY POINT TEMPS/POPS...
Chattanooga Airport, TN             70  93  71  92 /   0  10  10  20
Knoxville McGhee Tyson Airport, TN  68  92  69  89 /   0  10  10  20
Oak Ridge, TN                       69  92  69  89 /  10  10  10  20
Tri Cities Airport, TN              64  90  66  87 /  10  30  20  20

&&

.MRX WATCHES/WARNINGS/ADVISORIES...
NC...None.
TN...None.
VA...None.
&&

EMH/JW
Hazardous weather outlook, Aug 29, 2:58 PM EDT, 1 hour 14 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
258 PM EDT MON AUG 29 2016

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-301900-
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-
258 PM EDT MON AUG 29 2016 /158 PM CDT MON AUG 29 2016/

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

.DAY ONE...THIS AFTERNOON AND TONIGHT...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

In the hours before

Special weather statement, Aug 29, 4:12 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
412 PM EDT MON AUG 29 2016

VAZ001-292100-
LEE VA-
412 PM EDT MON AUG 29 2016

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN LEE COUNTY UNTIL 500 PM
EDT...

AT 412 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
PENNINGTON GAP...OR NEAR JONESVILLE...MOVING SOUTHWEST AT 10 MPH.

WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
JONESVILLE...PENNINGTON GAP...ST. CHARLES...
PATTONSVILLE AND ROSE HILL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3669 8293 3666 8295 3659 8311 3659 8327
      3660 8328 3669 8336 3674 8320 3674 8314
      3675 8313 3678 8313 3680 8310 3682 8310
      3684 8304
TIME...MOT...LOC 2012Z 058DEG 7KT 3673 8306

AMP.23

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 7:01 PM EDTSpecial Weather StatementMRXHawkins44 min
Aug 29, 7:30 PM EDTSevere Thunderstorm WarningMRXGreene, Hawkins30 min
Aug 29, 5:26 PM EDTSpecial Weather StatementMRXRussell49 min

Nearby

Special Weather Statements in Virginia, 2016Every special weather statement in 2016

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.