Alert archive / Tennessee / Special Weather Statements in 2016

Special Weather Statement, NWS Morristown, TN

April 22, 2016Knox County, Tennessee

NWS Morristown, TN issued this special weather statement at Apr 22, 2016, 4:03 PM EDT for Knox County, Tennessee. It was in force for 42 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: Apr 22, 2016, 4:03 PM EDT (20:03 UTC)
Expired: Apr 22, 2016, 4:45 PM EDT
In force: 42 min
Issued by: NWS Morristown, TN

County Knox County, TN

The radar

The Knoxville radar (KMRX), 65 km from the middle of the area, began a volume at 20:07 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, 8.1 hours before the alert went out and 230 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: 43 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 722 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 92 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

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 Apr 22, 3:08 PM EDT, 55 minutes earlier.

Area forecast discussion, Apr 22, 3:08 PM EDT, 55 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
308 PM EDT FRI APR 22 2016

.SHORT TERM (TONIGHT AND SATURDAY)...IT WILL BE AN ACTIVE EVENING
WITH A BROKEN LINE OF SHOWERS AND THUNDERSTORMS MOVING ACROSS THE
SOUTHERN APPALACHIAN REGION.  AIR MASS IS WEAKLY UNSTABLE WITH
MINIMAL CAPE.  A STRAY STORM COULD BECOME STRONG TO SEVERE BUT MOST
CONVECTION SHOULD REMAIN WELL BELOW THIS LEVEL.  THE CONVECTION
SHOULD EXIT THE AREA OVERNIGHT AS THE FRONTAL BOUNDARY MOVES
THROUGH. A RIDGE OF HIGH PRESSURE WILL BEGIN TO BUILD IN ON
SATURDAY FOR IMPROVING CONDITIONS WITH CLEARING SKIES AND SEASONAL
TEMPERATURES.

.LONG TERM (SATURDAY NIGHT THROUGH FRIDAY)...
UPPER LEVEL TROUGH OVER THE NORTHEASTERN US AND EASTERN CANADA
SLOWLY MOVES EAST LATE SATURDAY AND SATURDAY NIGHT WITH SURFACE HIGH
PRESSURE TAKING CONTROL ALONG THE EAST COAST AND SOUTHERN
APPALACHIANS BY SUNDAY. SATURDAY NIGHT WILL BE THE COLDEST NIGHT OF
THE EXTENDED AS LOW DEW POINTS IN THE UPPER 30S NE TO UPPER 40S
SW...CALM WINDS AND CLEAR SKIES PROVIDE MAX COOLING. LOWER 40S NE TO
NEAR 50 SOUTHWEST. SUNDAY TEMPERATURES WILL BE A FEW DEGREES WARMER
IN THE MID 70S TO LOWER 80S. RELATIVE HUMIDITIES WILL ALSO BE LOWEST
AROUND 25-30 PERCENT ACROSS NORTHEAST TN. THE COMBINATION OF THE
SURFACE HIGH SHIFTING TO THE EAST COAST AND RIDGING ALOFT WILL ALLOW
WARMER NIGHTS SUNDAY NIGHT AND MONDAY NIGHT AND WARMER DAYTIME
MONDAY INTO THE UPPER 70S TO LOWER 80S. BEGINNING TUESDAY A FRONT
BEGINS TO SINK SOUTH AND MOISTURE BEGINS TO INCREASE FROM THE GULF.
ISOLATED SHOWERS AND THUNDERSTORMS WILL DEVELOP IN THE HEAT OF THE
DAY BUT RAINFALL AMOUNTS NOT SIGNIFICANT. TEMPERATURES WILL STAY
WARM REACHING THE MID 80S IN A FEW PLACES TUESDAY AND WEDNESDAY.
AFTERNOON RELATIVE HUMIDITIES WILL BE HIGHER TOO MOSTLY 35-45
PERCENT. LOWS STILL WARM IN THE MID 50S TO MID 60S AS DEW POINTS
WILL BE MUCH HIGHER. RAIN CHANCES INCREASE THURSDAY AS A COLD FRONT
APPROACHES FROM THE WEST AND CONTINUE INTO FRIDAY AS THE FRONT ONLY
MOVES SLOWLY THROUGH EAST TN AND VICINITY.

&&

.PRELIMINARY POINT TEMPS/POPS...
CHATTANOOGA AIRPORT, TN             54  76  53  80 /  10   0   0   0
KNOXVILLE MCGHEE TYSON AIRPORT, TN  54  73  50  80 /  20   0   0   0
OAK RIDGE, TN                       54  73  50  80 /  20   0   0   0
TRI CITIES AIRPORT, TN              50  70  46  77 /  40  20   0   0

&&

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

MJB/TD

Hazardous weather outlook, Apr 22, 3:00 PM EDT, 1 hour 3 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
300 PM EDT FRI APR 22 2016

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-230715-
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-
300 PM EDT FRI APR 22 2016 /200 PM CDT FRI APR 22 2016/

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

.DAY ONE...REST OF TODAY AND TONIGHT...

SHOWERS AND THUNDERSTORMS CAN BE EXPECTED LATE AFTERNOON AND EVENING
AHEAD OF AN APPROACHING WEAK FRONTAL SYSTEM. A FEW OF THESE STORMS
MAY BECOME STRONG TO SEVERE...WITH DAMAGING WINDS AND LARGE HAIL THE
PRIMARY THREATS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

In the hours before

Special weather statement, Apr 22, 3:23 PM EDT, 40 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
323 PM EDT FRI APR 22 2016

TNZ068-071-086-222015-
NW BLOUNT TN-LOUDON TN-NORTHWEST MONROE TN-
323 PM EDT FRI APR 22 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN BLOUNT...LOUDON AND
NORTHWESTERN MONROE COUNTIES UNTIL 415 PM EDT...

AT 322 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
LOUDON...MOVING EAST AT 25 MPH.

DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
MARYVILLE...LENOIR CITY...ALCOA...SWEETWATER...LOUDON...LOUISVILLE...
VONORE...GREENBACK...FRIENDSVILLE...PHILADELPHIA AND CLOVER HILL.

LAT...LON 3561 8450 3571 8450 3576 8445 3575 8443
      3578 8442 3577 8439 3582 8438 3583 8436
      3584 8420 3579 8414 3585 8414 3583 8412
      3585 8408 3583 8406 3585 8405 3584 8402
      3586 8401 3586 8396 3559 8397
TIME...MOT...LOC 1922Z 270DEG 21KT 3572 8435

SR

Local storm report, Apr 22, 3:33 PM EDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
333 PM EDT FRI APR 22 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0320 PM     HAIL             DUNLAP                  35.37N 85.39W
04/22/2016  E0.50 INCH       SEQUATCHIE         TN   PUBLIC

            DIME SIZED HAIL REPORT VIA TWITTER

&&

Local storm report, Apr 22, 3:41 PM EDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
341 PM EDT FRI APR 22 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0330 PM     HAIL             LENOIR CITY             35.80N 84.27W
04/22/2016  E0.25 INCH       LOUDON             TN   PUBLIC

            PEA SIZED HAIL REPORT...VIA FACEBOOK.

&&

Special weather statement, Apr 22, 3:51 PM EDT, 12 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
351 PM EDT FRI APR 22 2016

TNZ069-222015-
KNOX TN-
351 PM EDT FRI APR 22 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN KNOX COUNTY UNTIL
415 PM EDT...

AT 351 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
KNOXVILLE...MOVING SOUTHEAST AT 10 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
KNOXVILLE...HALLS...MALONEYVILLE...LAKE FOREST AND MASCOT.

LAT...LON 3602 8403 3615 8387 3608 8370 3606 8369
      3605 8367 3603 8368 3602 8367 3600 8367
      3590 8390
TIME...MOT...LOC 1951Z 295DEG 11KT 3603 8387

MJB

Local storm report, Apr 22, 4:03 PM EDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
403 PM EDT FRI APR 22 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0400 PM     HAIL             OAK RIDGE               35.96N 84.30W
04/22/2016  E0.25 INCH       ROANE              TN   TRAINED SPOTTER

&&

Special weather statement, Apr 22, 4:03 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
403 PM EDT FRI APR 22 2016

TNZ036-069-222045-
KNOX TN-ANDERSON TN-
403 PM EDT FRI APR 22 2016

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN KNOX AND SOUTH CENTRAL
ANDERSON COUNTIES UNTIL 445 PM EDT...

AT 403 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
OAK RIDGE...MOVING EAST AT 20 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
KNOXVILLE...OAK RIDGE...CLINTON...FARRAGUT...OLIVER SPRINGS...HALLS...
KARNS...BEARDEN AND POWELL.

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.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3588 8395 3587 8396 3588 8399 3588 8400
      3589 8405 3591 8428 3600 8433 3610 8431
      3610 8389 3587 8394
TIME...MOT...LOC 2003Z 276DEG 18KT 3601 8424

05/MA

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 3:17 PM EDT	Special Weather Statement	MRX	Anderson, Knox	43 min
Apr 22, 3:23 PM EDT	Special Weather Statement	MRX	Loudon	52 min
Apr 22, 3:47 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Knox, Sevier	43 min
Apr 22, 3:51 PM EDT	Special Weather Statement	MRX	Knox	24 min
Apr 22, 4:18 PM EDT	Special Weather Statement	MRX	Jefferson, Sevier	12 min
Apr 22, 4:23 PM EDT	Severe Thunderstorm Warning	MRX	Jefferson, Sevier	52 min
Apr 22, 4:40 PM EDT	Special Weather Statement	MRX	McMinn, Monroe	50 min
Apr 22, 4:56 PM EDT	Severe Thunderstorm Warning	MRX	Cocke	22 min
Apr 22, 5:04 PM EDT	Special Weather Statement	MRX	Blount	41 min
Apr 22, 5:22 PM EDT	Special Weather Statement	MRX	Bradley, Polk	38 min
Apr 22, 6:47 PM EDT	Special Weather Statement	MRX	Wise, City of Norton	43 min

Nearby

Special Weather Statements in Tennessee, 2016 Every 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.