Alert archive / Tennessee / Flash Flood Warnings in 2010

Flash Flood Warning 6, NWS Morristown, TN

May 28, 2010Cocke County, Tennessee

NWS Morristown, TN issued this flash flood warning at May 28, 2010, 2:39 PM EDT for Cocke County, Tennessee. It was in force for 3 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
May 28, 2010, 2:39 PM EDT (18:39 UTC)
Expired
May 28, 2010, 5:30 PM EDT
In force
3 hr
Issued by
NWS Morristown, TN
Area
Storm-based polygon
Flood severity
None

County Cocke County, TN

The radar

The Knoxville radar (KMRX), 37 km from the middle of the area, began a volume at 18:43 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, 6.7 hours before the alert went out and 290 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 2010-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 141 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 2010-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
141 J/kg
Mixed-layer CIN
-209 J/kg
Mixed-layer LCL
1006 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
75 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at May 28, 2:00 PM EDT, 39 minutes earlier.

Area forecast discussion, May 28, 2:00 PM EDT, 39 minutes before
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE MORRISTOWN TN
200 PM EDT FRI MAY 28 2010

.AVIATION...THROUGH MUCH OF THE TAF PERIOD...SITES WILL SEE VFR
CONDITIONS.  HOWEVER...SHOWERS AND THUNDERSTORMS HAVE DEVELOPED OVER
THE AREA...AND WILL LIKELY OCCASIONALLY AFFECT THE TAF SITES.  WILL
CONTINUE MENTION OF VCTS WITH TS AS NEEDED...ANY STORM THAT CROSS
AN AIRPORT COULD PRODUCE MVFR TO IFR CONDITIONS. MOST OF THE
STORMS SHOULD DISSIPATE WITH SUNSET. GIVEN THE LIKELIHOOD OF
RAIN...WILL INCLUDE A MENTION OF MVFR FOG LATE TONIGHT.

&&

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

&&

MJB
Hazardous weather outlook, May 28, 8:50 AM EDT, 5 hours 49 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE MORRISTOWN TN
850 AM EDT FRI MAY 28 2010

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-291000-
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-
850 AM EDT (750 AM CDT) FRI MAY 28 2010

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

.DAY ONE...TODAY AND TONIGHT

AN UPPER LEVEL DISTURBANCE WILL HELP TO TRIGGER NUMEROUS SHOWERS AND
THUNDERSTORMS TODAY...WITH SOME STORMS BECOMING STRONG TO SEVERE
THIS AFTERNOON AND EVENING. THE MAIN THREATS WITH THESE STORMS WILL
BE DAMAGING WINDS...LARGE HAIL...AND CLOUD TO GROUND LIGHTNING. IN
ADDITION...LOCALLY HEAVY RAINFALL WILL BE POSSIBLE DUE TO THE
EXPECTED SLOW MOVEMENT OF THESE STORMS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP EACH AFTERNOON AND
EVENING THROUGH NEXT WEEK...WITH A FEW ISOLATED STORMS POSSIBLY
BECOMING SEVERE EACH DAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

DMG

In the hours before

Special weather statement, May 28, 1:37 PM EDT, 1 hour 2 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
137 PM EDT FRI MAY 28 2010

NCZ060-061-TNZ039>042-070>074-085>087-099>102-281815-
BLOUNT SMOKY MOUNTAINS TN-BRADLEY TN-CHEROKEE NC-CLAY NC-COCKE SMOKY
MOUNTAINS TN-EAST POLK TN-HAMBLEN TN-HAMILTON TN-JEFFERSON TN-MCMINN
TN-NORTH SEVIER TN-NORTHWEST COCKE TN-NORTHWEST GREENE TN-NORTHWEST
MONROE TN-NW BLOUNT TN-SEVIER SMOKY MOUNTAINS TN-SOUTHEAST MONROE
TN-WEST POLK TN-
137 PM EDT FRI MAY 28 2010

...SIGNIFICANT WEATHER ADVISORY FOR POLK...MONROE...EXTREME WESTERN
GREENE...SEVIER...COCKE...BLOUNT...JEFFERSON...BRADLEY...EXTREME
SOUTHERN HAMILTON...MCMINN...HAMBLEN...CLAY AND CHEROKEE COUNTIES
UNTIL 215 PM EDT...

AT 128 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM WATERVILLE TO
MCCAYSVILLE...AND MOVING NORTH AT 5 MPH.

PEA SIZE HAIL AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE
STORMS.

LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...DUCKTOWN...
GATLINBURG...NEWPORT...BENTON...SEVIERVILLE...DANDRIDGE...
PARROTTSVILLE...PIGEON FORGE...WHITE PINE...ETOWAH...ROUND
MOUNTAIN...HIAWASSE DAM...HARTFORD...UNAKA...VIOLET...COSBY...DEL
RIO...TURTLETOWN...PITTMAN CENTER AND ELKMONT.

17
Special weather statement, May 28, 2:11 PM EDT, 28 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
211 PM EDT FRI MAY 28 2010

TNZ017-018-044>047-281915-
JOHNSON TN-NORTHWEST CARTER TN-SOUTHEAST CARTER TN-SULLIVAN TN-UNICOI
TN-WASHINGTON TN-
211 PM EDT FRI MAY 28 2010

...SIGNIFICANT WEATHER ADVISORY FOR CARTER...UNICOI...JOHNSON...
SULLIVAN AND WASHINGTON COUNTIES UNTIL 315 PM EDT...

AT 206 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM MOUNTAIN CITY TO
ERWIN...AND MOVING NORTH AT 10 MPH.

PEA SIZE HAIL AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE
STORMS.

LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...ELIZABETHTON...
JOHNSON CITY...BRISTOL TN...KINGSPORT...JONESBOROUGH...GRAY...
COLONIAL HEIGHTS...LAUREL BLOOMERY...SADIE...HUNTER...SHADY VALLEY...
LIMESTONE...WATAUGA...AVONDALE...LEESBURG...SOUTH HOLSTON DAM...
HARR...BLUFF CITY...TRI-CITY AIRPORT AND BLOUNTVILLE.

17
Special weather statement, May 28, 2:33 PM EDT, 6 minutes before
<!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>
Local storm report, May 28, 2:39 PM EDT, 0 minutes before
<!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>

The office that day

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

IssuedProductOfficeCountiesLasted
May 28, 11:46 AM EDTAreal Flood AdvisoryMRXMonroe119 min
May 28, 12:25 PM EDTFlash Flood WarningMRXMonroe3 hr
May 28, 1:10 PM EDTSevere Thunderstorm WarningMRXGreene, Unicoi, Washington35 min
May 28, 1:50 PM EDTSevere Thunderstorm WarningMRXMcMinn, Monroe, Polk40 min
May 28, 2:19 PM EDTSevere Thunderstorm WarningMRXCocke, Jefferson41 min
May 28, 2:27 PM EDTSevere Thunderstorm WarningMRXBlount, Loudon, Monroe63 min
May 28, 2:30 PM EDTSevere Thunderstorm WarningMRXBradley, McMinn, Meigs, Polk50 min
May 28, 2:41 PM EDTSevere Thunderstorm WarningMRXBlount, Knox49 min
May 28, 2:52 PM EDTAreal Flood AdvisoryMRXBlount3 hr
May 28, 2:56 PM EDTAreal Flood AdvisoryMRXJohnson3 hr
May 28, 2:56 PM EDTSevere Thunderstorm WarningMRXLoudon, McMinn, Meigs, Monroe, Roane64 min
May 28, 2:58 PM EDTSevere Thunderstorm WarningMRXClaiborne, Grainger, Greene, Hamblen, Hancock, Hawkins and 1 more47 min
May 28, 3:43 PM EDTSevere Thunderstorm WarningMRXAnderson, Loudon, Morgan, Roane62 min
May 28, 3:47 PM EDTSevere Thunderstorm WarningMRXBlount, Grainger, Hamblen, Jefferson, Knox, Sevier28 min
May 28, 4:18 PM EDTAreal Flood AdvisoryMRXRoane3 hr
May 28, 4:38 PM EDTAreal Flood AdvisoryMRXHawkins3 hr
May 28, 4:43 PM EDTAreal Flood AdvisoryMRXGrainger, Jefferson, Knox3 hr
May 28, 4:43 PM EDTSevere Thunderstorm WarningMRXUnion62 min
May 28, 4:59 PM EDTAreal Flood AdvisoryMRXAnderson, Union3 hr
May 28, 5:17 PM EDTAreal Flood AdvisoryMRXClaiborne, Hancock3 hr
May 28, 1:45 PM EDTSevere Thunderstorm WarningMRXWashington60 min
May 28, 3:10 PM EDTAreal Flood AdvisoryMRXRussell3 hr
May 28, 3:11 PM EDTSevere Thunderstorm WarningMRXRussell, Washington34 min
May 28, 4:10 PM EDTFlash Flood WarningMRXRussell3 hr
May 28, 4:18 PM EDTSevere Thunderstorm WarningMRXLee27 min
May 28, 2:48 PM EDTAreal Flood AdvisoryMRXCherokee3 hr

Nearby

Flash Flood Warnings in Tennessee, 2010Every flash flood 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.