Appendices



Fire Weather Zone Maps

Fire weather zones consist of groups of counties (or occasionally single counties) selected based on homogeneous climatology and expected weather. These groupings may change from forecast issuance to forecast issuance, and may contain counties from adjacent states served by the same NWS office. For a map of the TN fire weather forecast zones, click here.



Observation Stations

 

RAWS = Remote Automatic Weather Station (forestry maintenance)
ASOS = Automated Surface Observation Station (NWS maintenance)
AWOS = Automated Weather Observation Station (FAA maintenance)

 

Station Name; County; Type; ID or Number; Latitude; Longitude; Elevation

 

Cherokee National Forest

 

Mountain City - Johnson County Airport; Johnson; AWOS; 6A4; 360 25' N; 810 51' W; 2241'

Nolichucky; Greene; RAWS; 403602; 35.982 N; 82.843 W; 2300'

Tellico; Monroe; RAWS; 407502; 35.2800 N; 84.2750 W; 1700'

Watauga; Unicoi/Washington; RAWS; 403604; 36.201 N; 82.389 W; 2880'

 

Great Smoky Mountains National Park

 

Indian Grave; Blount; RAWS; 407603; 35.6236 N; 83.8083 W; 2700'

 

East Tennessee District (East)

 

Elizabethton - Municipal Airport; Carter; AWOS; 0A9; 360 22' N; 820 10' W; 1584'

Greeneville - Greene County Municipal Airport; Greene; AWOS; GCY; 360 12' N; 820 49' W; 1608'

Hamblen County Headquarters; Hamblen; RAWS; 403301; 36.2572 N; 83.2772 W; 1163'

Morristown - Moore-Murrell Airport; Hamblen; AWOS; MOR; 360 11' N; 830 23' W; 1313'

Tri-Cities Regional Airport; Sullivan; ASOS; TRI; 360 28' N; 820 24' W; 1500'

 

East Tennessee District (West)

 

Big South Fork National Recreation Area; Scott; RAWS; 400902; 36.4750 N; 84.6542 W; 1445'

Chuck Swan State Forest; Union; RAWS; 403101; 36.3689 N; 83.8986 W; 1657'

Jacksboro - Campbell County Airport; Campbell; AWOS; JAU; 360 20' N; 840 10' W; 1180'

Knoxville - Downtown Island Airport; Knox; AWOS; DKX; 350 58' N; 830 52' W; 833'

Knoxville McGhee Tyson Airport; Blount; ASOS; TYS; 350 49' N; 830 59' W; 962'

Lenoir City; Loudon; RAWS; 405101; 35.8442 N; 84.3317 W; 1240'

Oak Ridge; Anderson; ASOS; OQT; 360 01' N; 840 14' W; 910'

Oneida - Scott County Municipal Airport; Scott; AWOS; SCX; 360 27' N; 840 35' W; 1542'

Sevierville - Gatlinburg-Pigeon Forge Airport; Sevier; AWOS; GKT; 350 52' N; 830 32' W; 1020'

 

Cumberland District (South)

 

Athens - McMinn County Airport; McMinn; AWOS; MMI; 350 24' N; 840 34' W; 858'

Bledsoe State Forest; Bledsoe; RAWS; 407102; 35.6819 N; 85.2733 W; 1780'

Chattanooga Lovell Field Airport; Hamilton; ASOS; CHA; 350 02' N; 850 12' W; 689'

Dayton - Mark Anton Airport; Rhea; AWOS; 2A0; 350 29' N; 840 56' W; 715'

Meigs EOC; Meigs; RAWS; 407301; 35.5208 N; 84.7931 W; 760'

Prentice Cooper State Forest; Marion; RAWS; 409201; 35.1303 N; 85.4278 W; 1920'

Tullahoma - Tullahoma Regional Airport; Coffee; AWOS; THA; 350 23' N; 860 15' W; 1082'

Winchester - Municipal Airport; Franklin; AWOS; BGF; 350 11' N; 860 04' W; 979'

 

Cumberland District (North)

 

Crossville Area Office; Cumberland; RAWS; 405001; 35.9178 N; 84.9972 W; 1770'

Crossville Memorial Airport; Cumberland; ASOS; CSV; 350 57' N; 850 05' W; 1867'

Lafayette Work Center; Macon; RAWS; 400501; 36.5411 N; 86.0028 W; 970'

Livingston - Municipal Airport; Overton; AWOS; 8A3; 360 25' N; 850 19' W; 1370'

McMinnville - Warren County Municipal Airport; Warren; AWOS; RNC; 350 42' N; 850 51' W; 1032'

Sparta - Upper Cumberland Regional Airport; White; AWOS; SRB; 360 03' N; 850 32' W; 1025'

 

Highland Rim District

 

Burns; Dickson; RAWS; 402102; 36.0650 N; 87.2831 W; 706'

Clarksville Outlaw Airport; Montgomery; ASOS; CKV; 360 37' N; 870 25' W; 560'

Columbia - Maury County Regional Airport; Maury; AWOS; MRC; 350 33' N; 870 11' W; 681'

Dickson - Municipal Airport; Dickson; AWOS; M02; 360 08' N; 870 26' W; 891'

Fayetteville - Municipal Airport; Lincoln; AWOS; FYM; 350 04' N; 860 34' W; 983'

Fort Campbell; Montgomery; RAWS; 400201; 36.6256 N; 87.5369 W; 545'

Gallatin - Sumner County Regional Airport; Sumner; AWOS; M33; 360 23' N; 860 25' W; 584'

Lawrenceburg - Lawrence County Airport; Lawrence; AWOS; 2M2; 350 14' N; 870 15' W; 936'

Lebanon - Municipal Airport; Wilson; AWOS; M54; 360 12' N; 860 19' W; 571'

Lewisburg Tower; Marshall; RAWS; 406601; 35.3817 N; 86.7658 W; 1150'

Lewisburg - Ellington Airport; Marshall; AWOS; LUG; 350 30' N; 860 48' W; 707'

Meriwether Lewis; Lewis; RAWS; 406401; 35.5025 N; 87.4581 W; 920'

Murfreesboro - Municipal Airport; Rutherford; AWOS; MBT; 350 53' N; 860 23' W; 615'

Nashville International Airport; Davidson; ASOS; BNA; 360 08' N; 860 41' W; 600'

Nashville - John Tune Airport; Davidson; AWOS; JWN; 360 11' N; 860 53' W; 494'

Portland - Municipal Airport; Sumner; AWOS; 1M5; 360 36' N; 860 29' W; 818'

Pulaski - Abernathy Field; Giles; AWOS; GZS; 350 09' N; 870 04' W; 689'

Savannah - Hardin County Airport; Hardin; AWOS; SNH; 350 10' N; 880 13' W; 473'

Shelbyville - Bomar Field; Bedford; AWOS; SYI; 350 34' N; 860 27' W; 802'

Shiloh National Military Park; Hardin; RAWS; 408302; 35.1550 N; 88.3217 W; 420'

Springfield - Robertson County Airport; Robertson; AWOS; M91; 360 32' N; 860 55' W; 708'

 

West Tennessee District

 

Beech River Regional Airport; Henderson; AWOS; PVE; 350 39.551' N; 880 11.581' W; 488'

Bolivar - William Whitehurst Field; Hardeman; AWOS; M08; 350 13' N; 890 03' W; 499'

Camden Tower; Benton; RAWS; 404001; 36.0661 N; 88.1686 W; 512'

Chickasaw State Forest; Hardeman; RAWS; 408001; 35.3725 N; 88.8292 W; 496'

Covington - Municipal Airport; Tipton; AWOS; M04; 350 35' N; 890 35' W; 280'

Dyersburg Regional Airport; Dyer; AWOS; DYR; 360 00' N; 890 24' W; 338'

Dyersburg; Dyer; RAWS; 403801; 350 59.717' N; 890 24.350' W; 208'

Greenfield; Weakley; RAWS; 401302; 360 09.648' N; 880 48.000' W; 499'

Huntingdon - Carroll County Airport; Carroll; AWOS; HZD; 360 05' N; 880 28' W; 497'

Jackson McKellar - Sipes Regional Airport; Madison; ASOS; MKL; 350 36' N; 880 55' W; 433'

Memphis International Airport; Shelby; ASOS; MEM; 350 03' N; 890 59' W; 254'

Millington Regional Jetport; Shelby; AWOS; NQA; 350 21' N; 890 52' W; 320'

Paris - Henry County Airport; Henry; AWOS; PHT; 360 20' N; 880 23' W; 580'

Selmer - Robert Sibley Airport; McNairy; AWOS; SZY; 350 12' N; 880 30' W; 610'

Somerville - Fayette County Airport; Fayette; AWOS; FYE; 350 12' N; 890 24' W; 436'

Union City - Everett-Stewart Regional Airport; Obion; AWOS; UCY; 360 23' N; 880 59' W; 342'



NOAA Weather Radio Transmitters Serving Tennessee Counties

For a map of each transmitter reception area, click here.

Location; NWS Office; Call Sign; Frequency; TN Counties Served

Beechgrove, TN; Nashville, TN (OHX); WXK-63; 162.475 MHz; Bedford, Cannon, Coffee, Franklin, Grundy, Marshall, Moore, Rutherford, Warren, Williamson and Wilson

Blue Ridge, GA; Atlanta, GA (FFC); KXI-75; 162.475 MHz; Polk

Booneville, MS; Memphis, TN (MEG); KIH-53; 162.400 MHz; Hardeman, Hardin, and McNairy

Bristol, TN; Morristown, TN (MRX); WXK-47; 162.550 MHz; Carter, Greene, Hancock, Hawkins, Johnson, Sullivan, Unicoi, and Washington

Centerville, TN; Nashville, TN (OHX); KWN-53; 162.450 MHz; Hickman, Maury, and Lewis

Chattanooga, TN; Morristown, TN (MRX); WXK-48; 162.550 MHz; Bledsoe, Bradley, Hamilton, McMinn, Marion, Meigs, Monroe, Polk, Rhea, Roane, and Sequatchie

Clarksville, TN; Nashville, TN (OHX); WWH-37; 162.500 MHz; Dickson, Montgomery, Robertson, and Stewart

Clifton, TN; Nashville, TN (OHX); WZ-2506; 162.500 MHz; Decatur, Hardin, McNairy, Perry, and Wayne

Cookeville, TN; Nashville, TN (OHX); WXK-61; 162.400 MHz; Clay, Cumberland, Dekalb, Fentress, Jackson, Overton, Pickett, Putnam, Smith, Trousdale, Van Buren, and White

Dyersburg, TN; Memphis, TN (MEG); WWH-30; 162.500 MHz; Crockett, Dyer, Gibson, Haywood, Lake, Lauderdale, Obion, and Weakley

Hickman, TN; Nashville, TN (OHX); WXN-74; 162.500 MHz; Cannon, DeKalb, Jackson, Putnam, Smith, Trousdale, and Wilson

Huntsville, AL; Huntsville, AL (HUN); KIH-20; 162.400 MHz; Lincoln

Jackson, TN; Memphis, TN (MEG); WXK-60; 162.550 MHz; Carroll, Chester, Crockett, Dyer, Gibson, Hardeman, Hardin, Haywood, Henderson, Madison, McNairy, and Weakley

Knoxville, TN; Morristown, TN (MRX); WXK-46; 162.475 MHz; Anderson, Blount, Campbell, Claiborne, Cocke, Grainger, Hamblen, Jefferson, Knox, Loudon, Monroe, Morgan, Roane, Scott, Sevier, and Union

La Follette, TN; Morristown, TN (MRX); WNG-732; 162.450 MHz; Anderson, Campbell, Claiborne, Morgan, Scott, and Union

Lafayette, TN; Nashville, TN (OHX); WNG-631; 162.525 MHz; Clay, Jackson, Macon, Smith, Sumner, Trousdale, and Wilson

Lawrenceburg, TN; Nashville, TN (OHX); WWF-84; 162.425 MHz; Giles, Lawrence, Lewis, Lincoln, Marshall, Maury, Wayne, and Williamson

Lobelville, TN; Nashville, TN (OHX); KWN-52; 162.525 MHz; Benton, Decatur, Henderson, Hickman, Humphreys, Lewis, Perry, and Wayne

Mayfield, KY; Paducah, KY (PAH); KIH-46; 162.475 MHz; Henry and Weakley

Memphis, TN; Memphis, TN (MEG); WXK-49; 162.475 MHz; Fayette, Hardeman, Haywood, Lauderdale, Shelby, and Tipton

Nashville, TN; Nashville, TN (OHX); KIG-79; 162.550 MHz; Cheatham, Davidson, Dickson, Maury, Montgomery, Robertson, Rutherford, Smith, Sumner, Trousdale, Williamson, and Wilson

Spencer, TN; Nashville, TN (OHX); WNG-629; 162.450 MHz; Bledsoe, Cumberland, DeKalb, Grundy, Marion, Putnam, Sequatchie, Van Buren, Warren, and White

Vale, TN; Memphis, TN (MEG); KHA-46; 162.450 MHz; Benton, Carroll, Henry, and Weakley

Waverly, TN; Nashville, TN (OHX); WXK-62; 162.400 MHz; Benton, Dickson, Hickman, Houston, Humphreys, Lewis, Montgomery, Perry, and Stewart

Winchester, TN; Huntsville, AL (HUN); WNG-554; 162.525 MHz; Bedford, Coffee, Franklin, Grundy, Lincoln, and Moore



Red Flag Criteria

A Red Flag Warning is issued when forecast conditions (high winds and low humidity), together with existing environmental conditions (extended dry periods), could result in extreme fire behavior within 24 hours. A Fire Weather Watch will be issued if Red Flag Warning conditions are possible in the next 24 to 48 hours. NWS forecasters will first coordinate the issuance of a Red Flag Warning or Fire Weather Watch with the associated land management agency after determining that fuels are dry enough for extreme fire danger concerns. A highlight of the Red Flag Warning or Fire Weather Watch should be included within the routine fire weather forecast.

Meteorological conditions which warrant the issuance of a Red Flag Warning or Fire Weather Watch in Tennessee are the following:

1. Strong winds with low humidity, generally 18 mph or higher sustained wind speeds with less than 25 percent relative humidity.

2. Rainfall of less than 0.25 inch during the past two days.



Fire Weather Product Examples

Click here for the latest products from:

Morristown, TN (MRX): Red Flag Warning or Fire Weather Forecast or Spot Forecast

Nashville, TN (OHX): Red Flag Warning or Fire Weather Forecast or Spot Forecast

Memphis, TN (MEG): Red Flag Warning or Fire Weather Forecast or Spot Forecast



FWF Update Criteria

The Fire Weather Planning Forecast (FWF) will be updated when the expected weather changes significantly from what was predicted in the routine forecast. The decision to issue a fire weather update will be based on the effect the weather change has on the fire behavior and the level of fire danger in the state. An update may be issued at any time of day and using the following guidelines:

1. If precipitation was not mentioned in the previous forecast and looks likely, or if it was forecast as being predominant and now looks as if it will not occur or remain isolated, an update should be issued.

2. An update should be considered when a front and its associated wind shift is much delayed or arrives sooner than expected.

3. An update should be considered whenever the wind speed is much stronger or lighter than previously expected. Differences of 10 to 15 mph in most cases are significant and may also apply to gustiness. If the wind direction differs by two or more compass points (more than 45 degrees), an update may be needed if the prevailing wind speed is 15 mph or more.

4. When relative humidity drops to very low levels (30 percent or less) and differs by more than 15 percent from the morning forecast, an update should be considered. Also, if the relative humidity remains high and low levels had been previously forecast, an updated forecast should be considered.


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