Alert archive / Tennessee / Flash Flood Watches in 2011
Flash Flood Watch 1, NWS Morristown, TN
NWS Morristown, TN issued this flash flood watch at Jun 19, 2011, 11:17 AM EDT for 23 counties in Tennessee; 7 counties in Virginia. It took effect at Jun 19, 2011, 12:00 PM EDT. It was in force for 18 hr.
The area
The counties it named.
The facts
- Issued
- Jun 19, 2011, 11:17 AM EDT (15:17 UTC)
- In effect from
- Jun 19, 2011, 12:00 PM EDT
- Expired
- Jun 20, 2011, 6:00 AM EDT
- In force
- 18 hr
- Issued by
- NWS Morristown, TN
- Flood severity
- None
All 30 counties
Anderson County, TN, Blount County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Johnson County, TN, Knox County, TN, Loudon County, TN, Morgan County, TN, Roane County, TN, Scott 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 nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 3.3 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.
- Mixed-layer CAPE
- 35 J/kg
- Mixed-layer CIN
- -220 J/kg
- Mixed-layer LCL
- 1343 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 249 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 Jun 19, 11:05 AM EDT, 12 minutes earlier.
Area forecast discussion, Jun 19, 11:05 AM EDT, 12 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
1105 AM EDT SUN JUN 19 2011
.DISCUSSION...
CURRENT SURFACE ANALYSIS SHOWS A NORTHWEST-TO-SOUTHEAST ORIENTED
FRONTAL BOUNDARY OVER CENTRAL EAST TN...WITH SATELLITE AND RADAR
IMAGERY REVEALING AN MCS MOVING INTO THE FORECAST AREA FROM KY. AN
EXTENSIVE AREA OF HEAVY RAINFALL WITH AMOUNTS OF ONE TO TWO INCHES
HAS ALREADY OCCURRED AROUND THE FRONTAL BOUNDARY THIS MORNING...WITH
ADDITIONAL HEAVY RAINFALL EXPECTED THIS AFTERNOON...AND THEN AGAIN
TONIGHT WITH ANOTHER MCS EXPECTED TO MOVE DOWN FROM THE OHIO RIVER
VALLEY. THUS...WILL PLAN TO ISSUE A FLOOD WATCH FOR THIS AFTERNOON
AND TONIGHT ACROSS CENTRAL EAST TN...NORTHEAST TN AND SOUTHWEST VA.
MODELS INDICATE THAT THE AIR MASS OVER THE SOUTHERN HALF OF THE
FORECAST AREA WILL BECOME MODERATELY TO POTENTIALLY VERY UNSTABLE
THIS AFTERNOON AND EVENING...SO THINK THIS MAY BE THE BEST PLACE FOR
THE POSSIBILITY OF SEVERE STORMS THIS AFTERNOON.
OVERALL...WILL PLAN TO UPDATE THE FORECAST THIS MORNING TO RAISE
POPS...TO LOWER TEMPS A LITTLE...AND TO MENTION THE FLOOD WATCH FOR
THIS AFTERNOON AND TONIGHT.
&&
.PRELIMINARY POINT TEMPS/POPS...
CHATTANOOGA AIRPORT, TN 92 68 97 71 96 / 40 20 10 10 10
KNOXVILLE AIRPORT, TN 88 68 94 69 94 / 60 30 10 10 10
OAK RIDGE, TN 87 68 94 69 94 / 60 30 10 10 10
TRI CITIES AIRPORT, TN 84 64 91 65 93 / 80 60 20 10 10
&&
.MRX WATCHES/WARNINGS/ADVISORIES...
NC...NONE.
TN...FLASH FLOOD WATCH THROUGH LATE TONIGHT FOR THE FOLLOWING ZONES:
ANDERSON...BLOUNT SMOKY MOUNTAINS...CAMPBELL...CLAIBORNE...
COCKE SMOKY MOUNTAINS...GRAINGER...HAMBLEN...HANCOCK...
HAWKINS...JEFFERSON...JOHNSON...KNOX...LOUDON...MORGAN...NW
BLOUNT...NORTH SEVIER...NORTHWEST CARTER...NORTHWEST
COCKE...NORTHWEST GREENE...ROANE...SCOTT TN...SEVIER SMOKY
MOUNTAINS...SOUTHEAST CARTER...SOUTHEAST GREENE...
SULLIVAN...UNICOI...UNION...WASHINGTON TN.
VA...FLASH FLOOD WATCH THROUGH LATE TONIGHT FOR THE FOLLOWING ZONES:
LEE...RUSSELL...SCOTT...WASHINGTON...WISE.
&&
DMGHazardous weather outlook, Jun 19, 3:43 AM EDT, 7 hours 34 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 343 AM EDT SUN JUN 19 2011 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-200745- 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- 343 AM EDT SUN JUN 19 2011 /243 AM CDT SUN JUN 19 2011/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT WITH PLENTY OF MOISTURE IN PLACE AND UPPER LEVEL DISTURBANCES IN A WESTERLY FLOW...SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS THE AREA TODAY...WITH THE GREATEST COVERAGE NORTH. THE STORMS WILL PRODUCE HEAVY RAIN AND FREQUENT LIGHTNING...AND THERE IS A SLIGHT RISK OF STORMS PRODUCING DAMAGING WIND GUSTS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY A COLD FRONT WILL APPROACH THE AREA...BRINGING A CHANCE OF SHOWERS AND THUNDERSTORMS ON THURSDAY. CONDITIONS MAY BECOME FAVORABLE FOR SEVERE THUNDERSTORMS THURSDAY AFTERNOON. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED AT TIMES TODAY.
In the hours before
Special weather statement, Jun 19, 6:08 AM EDT, 5 hours 9 minutes before
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</html>Special weather statement, Jun 19, 6:19 AM EDT, 4 hours 58 minutes before
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</html>The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 7:23 AM EDT | Areal Flood Advisory | MRX | Anderson, Campbell, Claiborne, Scott, Union | 112 min |
| Jun 19, 8:41 AM EDT | Areal Flood Advisory | MRX | Claiborne, Cocke, Grainger, Greene, Hamblen, Jefferson and 1 more | 3 hr |
| Jun 19, 9:33 AM EDT | Areal Flood Advisory | MRX | Blount, Knox, Sevier | 117 min |
| Jun 19, 12:22 PM EDT | Severe Thunderstorm Warning | MRX | Carter, Greene, Unicoi, Washington | 39 min |
| Jun 19, 3:18 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Knox | 42 min |
| Jun 19, 3:50 PM EDT | River Flood Warning | MRX | Cocke | 8 hr |
Nearby
Flash Flood Watches in Tennessee, 2011Flash Flood Watches in Virginia, 2011Every flash flood watch in 2011
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.