Alert archive / Tennessee / Flash Flood Warnings in 2010
Flash Flood Warning 22, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Sep 11, 2010, 7:29 PM EDT for 4 counties in Tennessee. It was in force for 72 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 11, 2010, 7:29 PM EDT (23:29 UTC)
- Expired
- Sep 11, 2010, 8:41 PM EDT
- In force
- 72 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bradley County, TN, Hamilton County, TN, Marion County, TN, Sequatchie County, TN
The radar
The Northeast Alabama radar (KHTX), 81 km from the middle of the area, began a volume at 23:29 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
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.5 hours before the alert went out and 216 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
- 356 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 1513 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Sep 11, 7:20 PM EDT, 9 minutes earlier.
Area forecast discussion, Sep 11, 7:20 PM EDT, 9 minutes before
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</html>Hazardous weather outlook, Sep 11, 2:25 PM EDT, 5 hours 4 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 225 PM EDT SAT SEP 11 2010 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-121000- 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- 225 PM EDT (125 PM CDT) SAT SEP 11 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST TENNESSEE...SOUTHWEST VIRGINIA AND EXTREME SOUTHWEST NORTH CAROLINA. .DAY ONE...TODAY AND TONIGHT MOISTURE FROM THE REMNANTS OF TROPICAL DEPRESSION HERMINE WILL COMBINE WITH A COLD FRONT MOVING EAST ACROSS THE TENNESSEE RIVER VALLEY TO PRODUCE NUMEROUS SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EVENING. A FEW OF THE STRONGER STORMS WILL HAVE THE POTENTIAL TO PRODUCE LOCALLY HEAVY RAINFALL AND DAMAGING WINDS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED DUE TO THE ISOLATED NATURE OF THE SEVERE WEATHER THREAT. DMG
In the hours before
Special weather statement, Sep 11, 2:40 PM EDT, 4 hours 49 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 240 PM EDT SAT SEP 11 2010 NCZ060-061-TNZ101-102-111945- CHEROKEE NC-CLAY NC-EAST POLK TN-WEST POLK TN- 240 PM EDT SAT SEP 11 2010 ...SIGNIFICANT WEATHER ADVISORY FOR POLK...CHEROKEE AND CLAY COUNTIES UNTIL 345 PM... AT 236 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A LINE OF STRONG THUNDERSTORMS NEAR DUCKTOWN...WHICH WERE MOVING EAST AT 25 MPH. WIND GUSTS UP TO 50 MPH AND LOCALLY HEAVY RAINFALL ARE EXPECTED WITH THESE STORMS. IN ADDITION TO GUSTY WINDS AND HEAVY RAIN...FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURES PRIMARY KILLERS ASSOCIATED WITH THUNDERSTORMS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. DMG
Special weather statement, Sep 11, 5:18 PM EDT, 2 hours 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 518 PM EDT SAT SEP 11 2010 TNZ012-035-112200- MORGAN TN-SCOTT TN- 518 PM EDT SAT SEP 11 2010 ...SIGNIFICANT WEATHER ADVISORY FOR SCOTT AND MORGAN COUNTIES UNTIL 600 PM EDT... AT 512 PM EDT/412 PM CDT/...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM WHITLEY CITY TO 10 MILES SOUTH OF JAMESTOWN...AND MOVING SOUTHEAST AT 30 MPH. PEA SIZE HAIL AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE STORMS. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...ONEIDA... WARTBURG...HUNTSVILLE...WINFIELD...RUGBY...KETCHEN...ELGIN...HIGH POINT...DEERLODGE...SUNBRIGHT...SLICK ROCK...NORMA...SMOKEY JUNCTION...PINE ORCHARD...PETROS AND OAKDALE. LOCALLY HEAVY RAINS...IN EXCESS OF ONE INCH PER HOUR...MAY OCCUR WITH THESE THUNDERSTORMS. MOTORISTS SHOULD BE ALERT FOR PONDING OF WATER ON ROADWAYS...AND POSSIBLE MINOR FLOODING OF LOW LYING AREAS. DO NOT DRIVE THROUGH WATERS OF UNKNOWN DEPTH. TURN AROUND! DON'T DROWN! 17
Special weather statement, Sep 11, 5:49 PM EDT, 1 hour 40 minutes before
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</html>Local storm report, Sep 11, 6:21 PM EDT, 1 hour 8 minutes before
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</html>Special weather statement, Sep 11, 6:33 PM EDT, 56 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 |
|---|---|---|---|---|
| Sep 11, 10:14 AM EDT | Areal Flood Advisory | MRX | Anderson, Campbell, Knox, Morgan, Roane, Scott | 3 hr |
| Sep 11, 5:35 PM EDT | Severe Thunderstorm Warning | MRX | Morgan, Scott | 40 min |
| Sep 11, 5:59 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Morgan, Roane, Union | 46 min |
| Sep 11, 6:27 PM EDT | Severe Thunderstorm Warning | MRX | Claiborne, Hancock, Union | 33 min |
| Sep 11, 6:36 PM EDT | Areal Flood Advisory | MRX | Claiborne, Cocke, Grainger, Greene, Hamblen, Hancock and 4 more | 114 min |
| Sep 11, 6:43 PM EDT | Areal Flood Advisory | MRX | Anderson, Blount, Cocke, Knox, Loudon, McMinn and 3 more | 3 hr |
| Sep 11, 6:51 PM EDT | Severe Thunderstorm Warning | MRX | Claiborne, Grainger, Hamblen, Hancock, Hawkins, Jefferson and 2 more | 24 min |
| Sep 11, 7:06 PM EDT | Severe Thunderstorm Warning | MRX | Blount, Bradley, Loudon, McMinn, Monroe, Polk | 39 min |
| Sep 11, 7:20 PM EDT | Severe Thunderstorm Warning | MRX | Blount, Knox | 25 min |
| Sep 11, 7:44 PM EDT | Severe Thunderstorm Warning | MRX | Blount, Jefferson, Knox, Sevier | 31 min |
| Sep 11, 3:09 PM EDT | Severe Thunderstorm Warning | MRX | Cherokee, Clay | 66 min |
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.