Alert archive / Tennessee / Flash Flood Warnings in 2010

Flash Flood Warning 1, NWS Nashville, TN

January 24, 20108 counties in Tennessee

NWS Nashville, TN issued this flash flood warning at Jan 24, 2010, 1:09 PM CST for 8 counties in Tennessee. It was in force for 3 hr. 5 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jan 24, 2010, 1:09 PM CST (19:09 UTC)
Expired: Jan 24, 2010, 4:15 PM CST
In force: 3 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

Counties Cumberland County, TN, Fentress County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Van Buren County, TN, Warren County, TN, White County, TN

The radar

The Nashville radar (KOHX), 115 km from the middle of the area, began a volume at 19:13 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.

What was reported inside it

Time	Report	Where	Remark
Jan 24, 1:45 PM CST	FLOOD	Cookeville, TN	SHERIFFS OFFICE REPORTED FLOODED ROADS IN THE COUNTY.
Jan 24, 1:45 PM CST	FLOOD	Crossville, TN	SHERIFFS OFFICE REPORTED VARIOUS ROADS AND CREEKS FLOODED ACROSS THE COUNTY.
Jan 24, 1:45 PM CST	FLOOD	Sparta, TN	SHERIFFS OFFICE REPORTED FLOODING ALONG SEVERAL ROADS IN THE COUNTY.
Jan 24, 1:50 PM CST	FLOOD	Spencer, TN	SHERIFFS OFFICE REPORTED MINOR FLOODING ALONG HIGHWAY 30E HEADED TOWARD FALL CREEK FALLS STATE PARK.
Jan 24, 2:15 PM CST	FLOOD	Crossville, TN	EMERGENCY MANAGEMENT REPORTED SOME CREEKS HAVE RISEN OVER BRIDGES, AS WELL AS SOME FLOODING OF AREA ROADWAYS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 7.2 hours before the alert went out and 118 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 471 m above ground
0-6 km bulk shear: 92 kt
0-1 km storm-relative helicity: 231 m²/s²
0-3 km storm-relative helicity: 542 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

341 
WGUS54 KOHX 241909
FFWOHX
TNC035-049-133-137-141-175-177-185-242215-
/O.NEW.KOHX.FF.W.0001.100124T1909Z-100124T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
109 PM CST SUN JAN 24 2010

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CUMBERLAND COUNTY IN MIDDLE TENNESSEE...
  THIS INCLUDES THE CITY OF CROSSVILLE...
  FENTRESS COUNTY IN MIDDLE TENNESSEE...
  THIS INCLUDES THE CITY OF JAMESTOWN...
  OVERTON COUNTY IN MIDDLE TENNESSEE...
  THIS INCLUDES THE CITY OF LIVINGSTON...
  PICKETT COUNTY IN MIDDLE TENNESSEE...
  THIS INCLUDES THE CITY OF BYRDSTOWN...
  PUTNAM COUNTY IN MIDDLE TENNESSEE...
  THIS INCLUDES THE CITY OF COOKEVILLE...
  VAN BUREN COUNTY IN MIDDLE TENNESSEE...
  THIS INCLUDES THE CITY OF SPENCER...
  WARREN COUNTY IN MIDDLE TENNESSEE...
  THIS INCLUDES THE CITY OF MCMINNVILLE...
  WHITE COUNTY IN MIDDLE TENNESSEE...
  THIS INCLUDES THE CITY OF SPARTA...

* UNTIL 415 PM CST

* SHOWERS AND ISOLATED THUNDERSTORMS...PRODUCING LOCALLY
HEAVY RAINFALL...HAVE SHOWN A RECENT INCREASE IN INTENSITY OVER THE
AREA...AND THE THREAT OF FLASH FLOODING ALONG CREEKS AND STREAMS HAS 
ALSO INCREASED. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL LIKELY CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS. URBAN FLOODING...OF POORLY DRAINED AREAS...
IS ALSO LIKELY.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.


&&

LAT...LON 3627 8487 3616 8489 3587 8470 3580 8487
      3578 8523 3558 8542 3555 8585 3564 8596
      3582 8590 3584 8557 3602 8559 3614 8575
      3619 8556 3631 8543 3644 8545 3652 8524
      3662 8524 3660 8477 3645 8469

$$

19

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 Nashville, TN wrote its last area forecast discussion before this flash flood warning went out at Jan 24, 10:57 AM CST, 2 hours 12 minutes earlier.

Area forecast discussion, Jan 24, 10:57 AM CST, 2 hours 12 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1057 AM CST SUN JAN 24 2010

.UPDATE...
NORTH TO SOUTH OCCLUDED FRONT DOWN ALONG AND JUST EAST OF
INTERSTATE 65 AT 16Z WITH RAIN CONTINUING ACROSS EAST HALF OF MID
STATE AND ALONG PLATEAU. MORE SCATTERED SHOWERS WEST OF FRONT THAT
WILL BE AROUND MUCH OF THE DAYLIGHT HOURS. FRONT SHOULD MOVE EAST
AND BE ALONG PLATEAU AROUND NOON. A COLD FRONT AT 16Z EXTENDS DOWN
THROUGH THE MID MISSISSIPPI VALLEY WITH THE LEADING EDGE TO ABOUT
SAINT LOUIS AND EXTENDS ACROSS NORTHWEST ARKANSAS THEN BACK INTO
NORTH CENTRAL TEXAS. THIS FRONT HAS SOME COLD AIR BEHIND IT AND
WILL REPRESENT AN AIR MASS CHANGE FROM MARITIME TROPICAL TO CONTINENTAL
POLAR FOR THE MID STATE TONIGHT. A 1040 MILLIBAR CENTER IS LOCATED
IN THE NORTHWEST TERRITORIES NORTH OF BRITISH COLUMBIA. THE FRONT
WILL ENTER THE MID STATE AROUND 00Z TODAY AND MOVE QUICKLY
SOUTHEAST.

12Z MODELS CONTINUE TO BRING TEXAS LOW PRESSURE SYSTEM ACROSS
NORTH LOUISANA...INTO CENTRAL MISSISSIPPI/ALABAMA THURSDAY NIGHT
AND THEN ACROSS NORTH CENTRAL GEORGIA ON FRIDAY. 1040 MILLIAR
HIGH PRESSURE CENTERED OVER NORTHWEST IOWA DURING THIS TIME
FRAME. THUS...THE POTENTIAL EXISTS FOR WINTRY WEATHER IN THE MID
STATE BEGINNING THURSDAY AFTERNOON IN THE NORTHWEST AND ACROSS
ALL OF MIDDLE TENNESSEE THURSDAY NIGHT INTO FRIDAY.

BOYD

&&

.PREV DISCUSSION... /ISSUED 601 AM CST SUN JAN 24 2010/

UPDATE...FOR 12Z AVIATION DISCUSSION.

AVIATION...12Z AVIATION DISCUSSION.
UNCERTAINTIES...CEILING HEIGHT TIMING PROGRESSI0NS/FOG FORMATION
AOA 25/06Z/WIND SPEED TIMING DECREASES THRU 25/12Z. SFC COLD
FRONT WILL MOVE SLOWLY...AND EXIT E PORTIONS BY 25/03Z. LIGHT
SHWRS EXPECTED THRU 25/02Z CSV. WRAP AROUND MOISTURE POSSIBLE
..ESPECIALLY PLATEAU...WILL PROVIDE FOR MVFR CEILINGS...AS
UPPER TROUGH MOVES INTO REGION. SOME CLOUD COVER BREAKS
EXPECTED AOA 25/06Z...THUS CAN NOT RULE OUT MVFR FOG VSBYS
RESTRICTIONS PER PLENTIFUL LOW LEVEL MOISTURE POTENTIAL. WIND
GUSTS SHOULD DISSIPATE ACROSS MID STATE W TO E BY 24/15Z.

PREV DISCUSSION... /ISSUED 554 AM CST SUN JAN 24 2010/

DISCUSSION...
WIND GUSTS ARE NOW BELOW 30 MPH AT MOST LOCATIONS. WILL ALLOW THE
WIND ADVISORY TO EXPIRE AT 6 AM CST. WILL ISSUE UPDATE SHORTLY
THEREAFTER.

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

Hazardous weather outlook, Jan 24, 6:04 AM CST, 7 hours 5 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
604 AM CST SUN JAN 24 2010

TNZ005>011-022>034-056>066-075-077>080-093>095-251200-
STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-BENTON-
HOUSTON-HUMPHREYS-DICKSON-CHEATHAM-DAVIDSON-WILSON-TROUSDALE-
SMITH-JACKSON-PUTNAM-OVERTON-FENTRESS-PERRY-HICKMAN-LEWIS-
WILLIAMSON-MAURY-MARSHALL-RUTHERFORD-CANNON-DEKALB-WHITE-
CUMBERLAND-BEDFORD-COFFEE-WARREN-GRUNDY-VAN BUREN-WAYNE-LAWRENCE-
GILES-
604 AM CST SUN JAN 24 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

WINTRY PRECIPITATION POSSIBLE TOWARD THE END OF WEEK. EVENT STILL
FOUR OR FIVE DAYS AWAY...BUT THE LIKELIHOOD IS ON THE INCREASE.

31/JBW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 24, 9:00 AM CST	River Flood Warning	OHX	Bedford	23 hr
Jan 24, 11:31 AM CST	Areal Flood Advisory	OHX	Clay, Fentress, Overton, Pickett	4 hr
Jan 24, 12:19 PM CST	River Flood Advisory	OHX	Bedford	6 hr
Jan 24, 12:33 PM CST	Areal Flood Advisory	OHX	Cumberland, DeKalb, Grundy, Jackson, Putnam, Van Buren and 2 more	3 hr
Jan 24, 3:58 PM CST	Severe Thunderstorm Warning	OHX	Robertson	32 min
Jan 24, 4:07 PM CST	Tornado Warning	OHX	Robertson	8 min

Nearby

Flash Flood Warnings in Tennessee, 2010 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.