Alert archive / Tennessee / Special Weather Statements in 2016

Special Weather Statement, NWS Morristown, TN

May 1, 2016Knox County, Loudon County, Tennessee

NWS Morristown, TN issued this special weather statement at May 1, 2016, 2:13 AM EDT for Knox County, Loudon County, Tennessee. It was in force for 47 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
May 1, 2016, 2:13 AM EDT (06:13 UTC)
Expired
May 1, 2016, 3:00 AM EDT
In force
47 min
Issued by
NWS Morristown, TN

Counties Knox County, TN, Loudon County, TN

The radar

The Knoxville radar (KMRX), 80 km from the middle of the area, began a volume at 06:17 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, 6.2 hours before the alert went out and 228 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 2016-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 135 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, Nashville Metro, TN at 00:00Z on 2016-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 165 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
135 J/kg
Mixed-layer CIN
-72 J/kg
Mixed-layer LCL
1111 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
165 m²/s²
0-3 km storm-relative helicity
255 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.2

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 May 1, 1:31 AM EDT, 42 minutes earlier.

Area forecast discussion, May 1, 1:31 AM EDT, 42 minutes before
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Hazardous weather outlook, Apr 30, 3:35 PM EDT, 10 hours 38 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
335 PM EDT SAT APR 30 2016

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-011945-
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-
335 PM EDT SAT APR 30 2016 /235 PM CDT SAT APR 30 2016/

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

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

A FEW STORMS MAY PRODUCE DAMAGING WINDS OR HAIL UP TO QUARTER SIZE.
OTHERWISE STORMS SHOULD REMAIN BELOW SEVERE LIMITS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

...STRONG THUNDERSTORMS ARE POSSIBLE SUNDAY AFTERNOON AND EARLY
EVENING...

STRONG THUNDERSTORMS ARE EXPECTED TO DEVELOP SUNDAY AFTERNOON INTO
THE EVENING AHEAD OF A COLD FRONT. A FEW SEVERE STORMS WILL BE
POSSIBLE. LARGE HAIL UP TO QUARTER SIZE WILL BE THE PRIMARY THREAT
WITH THESE STORMS. DAMAGING WIND AND BRIEF HEAVY RAIN MAY ACCOMPANY
THESE STORMS TOO.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED SUNDAY AFTERNOON AND EVENING.

In the hours before

Special weather statement, May 1, 12:51 AM EDT, 1 hour 22 minutes before
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Special weather statement, May 1, 2:13 AM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 1, 12:51 AM EDTSpecial Weather StatementMRXMcMinn, Meigs39 min
May 1, 5:35 AM EDTAreal Flood AdvisoryMRXScott115 min
May 1, 3:04 PM EDTSpecial Weather StatementMRXBradley41 min
May 1, 3:39 PM EDTSpecial Weather StatementMRXPolk51 min
May 1, 7:45 PM EDTSpecial Weather StatementMRXBlount45 min
May 1, 7:34 AM EDTSpecial Weather StatementMRXRussell26 min
May 1, 7:55 PM EDTSevere Thunderstorm WarningMRXWise35 min

Nearby

Special Weather Statements in Tennessee, 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.