Alert archive / Tennessee / Flash Flood Watches in 2015

Flash Flood Watch 1, NWS Morristown, TN

July 2, 201533 counties in Tennessee; 7 counties in Virginia; Cherokee County, Clay County, North Carolina

NWS Morristown, TN issued this flash flood watch at Jul 2, 2015, 6:59 PM EDT for 33 counties in Tennessee; 7 counties in Virginia; Cherokee County, Clay County, North Carolina. It was in force for 3 days.

The area

The counties it named.

The facts

Issued: Jul 2, 2015, 6:59 PM EDT (22:59 UTC)
Expired: Jul 6, 2015, 3:31 AM EDT
In force: 3 days
Issued by: NWS Morristown, TN

All 42 counties

Cherokee County, NC, Clay County, NC, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hamilton County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Johnson County, TN, Knox County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Sevier County, TN, Sullivan County, TN, Unicoi County, TN, Union County, TN, Washington 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), 27 km from the middle of the area, began a volume at 23:00 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, 11.0 hours before the alert went out and 265 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: 9 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 887 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -135 m²/s²
0-3 km storm-relative helicity: -18 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 watch went out at Jul 1, 7:30 PM EDT, 23 hours 29 minutes earlier.

Area forecast discussion, Jul 1, 7:30 PM EDT, 23 hours 29 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.

Issued	Product	Office	Counties	Lasted
Jul 2, 3:54 AM EDT	Areal Flood Advisory	MRX	Bradley, Hamilton, Polk	2 hr
Jul 2, 5:04 AM EDT	Areal Flood Advisory	MRX	Bledsoe, Hamilton, Meigs, Rhea	3 hr
Jul 2, 9:48 AM EDT	Areal Flood Advisory	MRX	Bledsoe, McMinn, Meigs, Rhea	3 hr
Jul 2, 11:08 AM EDT	Areal Flood Advisory	MRX	Hamilton, Marion, Sequatchie	3 hr
Jul 2, 11:21 AM EDT	Areal Flood Advisory	MRX	McMinn, Monroe, Polk	3 hr
Jul 2, 11:29 AM EDT	Areal Flood Advisory	MRX	Bradley, Hamilton, McMinn, Meigs, Polk	3 hr
Jul 2, 12:55 PM EDT	Areal Flood Advisory	MRX	Bledsoe	110 min
Jul 2, 5:56 PM EDT	Flood Watch	MRX	Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more	63 min
Jul 2, 6:46 PM EDT	Special Weather Statement	MRX	Marion	59 min
Jul 2, 7:48 PM EDT	Special Weather Statement	MRX	Hamilton	42 min

Nearby

Flash Flood Watches in Tennessee, 2015 Flash Flood Watches in Virginia, 2015 Flash Flood Watches in North Carolina, 2015 Every flash flood watch in 2015

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.