Point Forecast Matrices
Issued by NWS Knoxville/Tri Cities, TN
Issued by NWS Knoxville/Tri Cities, TN
774 FOUS54 KMRX 210627 PFMMRX Point Forecast Matrices National Weather Service Morristown TN 226 AM EDT Fri Aug 21 2026 TNZ017-212000- Tri Cities Airport-Sullivan TN 36.50N 82.41W Elev. 1536 ft 226 AM EDT Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 84 65 83 63 81 Temp 68 68 76 82 80 72 69 67 66 67 73 81 82 75 68 65 63 64 71 78 80 72 Dewpt 67 67 70 72 71 69 68 67 66 67 69 69 68 66 66 65 63 64 64 61 59 59 RH 97 97 82 72 74 90 97100100100 87 67 63 74 93100100100 79 56 49 64 Wind Dir E SE SE SW W SW N N N SW W W W W SW SW W W W W NW W Wind Spd 1 1 1 3 4 2 0 0 0 0 3 6 8 4 2 1 1 1 4 8 9 4 Clouds B1 B2 B1 SC SC SC SC SC SC B1 B1 SC SC SC SC SC SC SC FW FW FW FW PoP 12hr 80 40 30 30 5 QPF 12hr 0.45 0.01 0 0.01 0 Rain shwrs C C S C L C S C C Tstms C S S C L C S S Heat index 86 84 85 Max heat 89 87 85 87 82 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 58 82 57 82 62 85 65 84 Temp 60 59 78 72 60 59 79 73 64 63 82 76 67 67 81 76 Dewpt 57 57 59 59 57 57 61 61 61 62 66 67 66 66 70 68 PWind Dir NW W NE W SE SW S SW Wind Char LT LT LT LT LT LT LT LT Avg Clouds FW FW SC SC SC SC SC SC SC SC B1 B1 B1 B1 B2 B1 PoP 12hr 5 5 5 10 10 30 50 50 Rain shwrs C C C C C Tstms C S C $$ TNZ071-212000- Knoxville McGhee Tyson Airport-Blount TN 35.80N 83.98W Elev. 979 ft 226 AM EDT Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 88 69 88 67 87 Temp 72 72 79 86 84 76 73 72 70 69 78 86 86 79 73 70 68 67 77 84 86 78 Dewpt 70 70 73 74 73 72 71 70 70 69 72 70 69 68 67 67 66 66 66 63 60 60 RH 93 93 82 68 70 87 93 93100100 82 59 57 69 81 90 93 97 69 49 42 54 Wind Dir S NE W W W N N N N N NW W W W SW SW N N N NW NW N Wind Spd 1 1 1 3 4 3 0 0 0 0 1 4 6 4 2 1 0 0 2 4 6 4 Clouds B1 B2 B1 SC SC SC B1 SC B1 B1 SC SC FW FW SC FW FW FW FW FW FW FW PoP 12hr 40 20 5 20 5 QPF 12hr 0.02 0.05 0 0 0 Rain shwrs C S C C S S S Tstms S S C C S Heat index 94 90 91 90 Max heat 94 95 91 92 85 86 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 63 86 63 85 66 89 69 88 Temp 67 64 83 77 66 64 82 78 69 67 85 80 72 69 84 79 Dewpt 60 60 61 61 60 60 64 63 64 64 68 68 68 68 71 69 PWind Dir NE NW NE W S SW SW SW Wind Char LT LT LT LT LT LT LT LT Avg Clouds FW SC SC SC B1 SC SC SC SC SC SC SC SC B1 B1 B1 PoP 12hr 5 5 20 30 10 50 50 50 Rain shwrs S S S C S C C C C C Tstms C C S C $$ TNZ036-212000- Oak Ridge-Anderson TN 36.00N 84.24W Elev. 913 ft 226 AM EDT Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 87 68 89 65 87 Temp 71 71 78 83 83 76 73 70 69 69 79 86 88 79 72 68 66 66 77 83 85 77 Dewpt 70 70 73 74 74 72 71 70 69 69 72 70 69 68 67 66 65 65 66 63 61 62 RH 97 97 85 74 74 87 93100100100 79 59 54 69 84 93 97 97 69 51 45 60 Wind Dir N E N SW W N NE N N N N W W W W NW NW NW N NW NW NW Wind Spd 0 1 0 1 2 1 1 0 0 0 0 2 4 3 2 1 1 1 1 3 4 2 Clouds B2 B2 B1 SC SC SC SC FW SC SC SC FW FW SC FW FW FW FW FW FW FW FW PoP 12hr 40 10 5 5 5 QPF 12hr 0.03 0 0 0 0 Rain shwrs C S C C Tstms S S C C Heat index 90 90 91 92 Max heat 90 93 91 92 84 86 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 61 86 62 84 65 87 68 87 Temp 64 62 82 75 65 63 80 76 68 66 83 78 70 68 83 78 Dewpt 60 59 62 62 60 60 64 65 64 64 69 69 68 68 72 70 PWind Dir N W N SW W SW SW SW Wind Char LT LT LT LT LT LT LT LT Avg Clouds FW SC SC SC SC SC SC SC SC SC SC B1 SC B1 B1 B1 PoP 12hr 5 5 20 30 10 40 50 50 Rain shwrs S S S C S C C C C C Tstms S C C S C $$ TNZ099-212000- Chattanooga Airport-Hamilton TN 35.03N 85.22W Elev. 688 ft 226 AM EDT Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 92 71 93 69 91 Temp 73 73 81 89 90 82 75 73 72 71 82 90 92 84 76 73 70 70 81 88 90 81 Dewpt 72 72 74 74 73 73 73 72 71 71 72 69 68 69 69 68 67 66 66 62 60 62 RH 97 97 79 61 58 74 94 97 97100 72 50 46 61 79 84 90 87 60 42 37 53 Wind Dir N N SW W W NW W N N N N NW NW NW NW NW NW N N N NW N Wind Spd 0 0 1 3 5 3 1 0 0 0 2 3 8 3 1 1 2 2 3 5 8 5 Clouds B2 SC SC SC SC SC SC FW FW SC CL CL CL CL FW SC FW FW CL FW FW FW PoP 12hr 20 5 0 0 5 QPF 12hr 0 0 0 0 0 Rain shwrs S Tstms S Heat index 86 98 98 87 87 95 96 88 Max heat 98 98 95 96 88 91 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 66 90 66 89 69 90 70 90 Temp 69 67 86 80 69 67 85 81 71 70 87 80 72 71 86 81 Dewpt 62 62 61 61 63 63 64 65 66 66 69 70 70 70 72 71 PWind Dir N N N SE SE SW S SW Wind Char LT LT LT LT LT LT LT LT Avg Clouds FW SC SC SC SC SC SC SC SC SC SC SC SC B1 SC SC PoP 12hr 5 20 30 40 30 50 50 50 Rain shwrs S S C C C C C C C C C C Tstms S S S C C C C $$ NCZ060-212000- Tusquitee RAWS-Forestry-Cherokee NC 35.07N 84.12W Elev. 1600 ft 226 AM EDT Fri Aug 21 2026 Date Fri 08/21/26 Sat 08/22/26 Sun 08/23/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 88 65 87 62 85 Temp 69 68 80 86 83 73 70 68 67 67 77 85 85 75 69 66 64 63 76 82 84 74 Dewpt 68 68 73 73 73 71 70 68 67 67 71 69 68 66 66 65 64 63 65 62 60 61 RH 97100 79 65 72 93100100100100 82 59 57 74 90 97100100 69 51 44 64 Min/Max RH 65 100 55 100 43 Wind Dir N N N SW W N N N N N NW NW NW NW NW N NW NW NW NW NW N Wind Dir Deg 0 0 0 22 28 0 0 0 0 0 31 30 30 30 31 0 32 32 32 32 32 33 Wind Spd 0 0 0 3 3 0 0 0 0 0 3 5 6 2 1 0 2 2 5 8 6 2 Clouds B2 B2 SC SC FW SC SC B1 B1 B1 FW FW CL CL FW SC SC SC FW CL FW FW Clouds (%) 87 73 37 38 24 41 41 53 55 66 24 9 5 1 11 27 32 30 8 4 6 7 Vsby 10 7 10 6 10 10 10 7 7 7 10 PoP 12hr 60 10 0 0 0 QPF 12hr 0.12 0 0 0 0 Rain shwrs C S L C Tstms S C C Heat index 84 93 89 89 88 Max heat 93 89 89 89 83 85 ChanceThunder 50 10 0 0 0 Max Mix Hgt AGL Mix Hgt 3600 5200 6100 Max Vent Rt 21700 52300 61200 T Wind Dir SW NW N T Wind Spd 4 9 9 ADI 22 52 62 Max LVORI 10 10 10 Stability F A A F F B A G G B A Ceiling NONE NONE NONE NONE 5500 NONE 9800 13100 NONE 25000 NONE Sta Pres 27.92 27.92 27.85 27.86 27.90 27.88 27.88 27.90 27.95 27.95 27.95 Date Mon 08/24/26 Tue 08/25/26 Wed 08/26/26 Thu 08/27/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 58 85 59 84 62 86 64 86 Temp 62 59 82 72 62 61 80 73 65 63 83 75 67 65 82 75 Dewpt 58 57 61 61 59 58 64 64 62 62 69 68 66 65 71 68 PWind Dir N NW N W N SW SW W Wind Char LT LT LT LT LT LT LT LT Avg Clouds FW SC SC SC SC SC B1 SC SC SC B1 SC SC B2 B2 SC PoP 12hr 5 10 20 40 30 50 50 50 Rain shwrs S C C C C C C C C C Tstms S C C S S C This is an experimental product for planning and review purposes only, and is not to be substituted for an official fire weather spot forecast $$