Point Forecast Matrices
Issued by NWS Knoxville/Tri Cities, TN
Issued by NWS Knoxville/Tri Cities, TN
055 FOUS54 KMRX 170626 PFMMRX Point Forecast Matrices National Weather Service Morristown TN 226 AM EDT Thu Sep 17 2026 TNZ017-172000- Tri Cities Airport-Sullivan TN 36.50N 82.41W Elev. 1536 ft 226 AM EDT Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 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 90 68 89 67 88 Temp 67 67 80 88 86 78 72 70 69 68 79 86 86 78 71 69 68 67 79 85 87 79 Dewpt 66 66 70 71 71 72 71 69 68 68 72 71 72 71 71 69 68 67 72 71 70 70 RH 97 97 72 57 61 82 97 97 97100 79 61 63 79100100100100 79 63 57 74 Wind Dir N SE SW NW W SW N N N SE SW NW N N NE NE E E SE W W SE Wind Spd 0 0 2 3 3 1 0 0 0 0 1 3 3 2 0 0 0 1 0 3 2 3 Clouds FW SC FW FW B1 B1 B1 B1 SC B1 B1 SC SC SC SC SC SC B1 SC SC FW FW PoP 12hr 30 20 50 10 30 QPF 12hr 0.01 0 0.09 0 0 Rain shwrs S C S C C S S C C S Tstms S C S C C S C C S Heat index 94 92 92 92 90 92 Max heat 96 97 94 96 92 95 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 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 87 66 88 65 85 63 82 Temp 68 66 84 79 69 67 85 78 68 66 82 76 67 64 79 74 Dewpt 68 66 71 70 68 67 70 70 67 66 69 69 66 64 68 67 PWind Dir SE SW NW W E SE E E Wind Char LT LT LT LT LT LT LT LT Avg Clouds SC SC SC SC SC SC B1 SC B1 SC B1 B1 B1 SC B1 SC PoP 12hr 20 40 20 50 30 60 20 30 Rain shwrs S C S C C L S C Tstms S C S C S S $$ TNZ071-172000- Knoxville McGhee Tyson Airport-Blount TN 35.80N 83.98W Elev. 979 ft 226 AM EDT Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 94 72 95 70 93 Temp 72 70 83 91 94 86 79 75 73 72 84 92 95 86 78 75 72 71 83 90 93 85 Dewpt 69 69 72 72 71 71 71 71 70 70 72 72 71 71 71 71 70 70 73 72 71 71 RH 90 97 70 54 47 61 77 87 90 93 67 52 46 61 79 87 93 97 72 56 49 63 Wind Dir SW S SW N NE NE SE N N N N NE NE N E NE E E N NW NE S Wind Spd 1 1 1 2 3 2 1 0 0 0 0 3 4 3 2 2 1 1 0 2 2 3 Clouds FW FW FW FW SC FW B1 SC SC SC CL FW SC B1 SC SC SC SC FW FW FW SC PoP 12hr 5 5 20 10 20 QPF 12hr 0 0 0 0 0 Rain shwrs S S S S Tstms S S S S Heat index 88 99101 91 90100103 91 89 97100 90 Max heat 99 102 87 100 103 85 97 100 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 70 92 70 92 69 90 67 87 Temp 74 71 89 84 74 71 90 82 73 69 87 80 71 68 84 78 Dewpt 70 69 72 70 69 68 71 70 69 68 72 71 70 68 71 70 PWind Dir S SW S NW SE E E NE Wind Char LT LT LT LT LT LT LT LT Avg Clouds SC SC FW SC SC SC SC SC B1 B1 B1 SC B1 B1 B1 B1 PoP 12hr 20 20 10 40 30 60 40 50 Rain shwrs S S C C S L C S S C Tstms S S C S C S S $$ TNZ036-172000- Oak Ridge-Anderson TN 36.00N 84.24W Elev. 913 ft 226 AM EDT Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 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 94 71 95 70 93 Temp 71 70 84 92 92 82 76 74 72 72 84 93 92 82 76 73 72 71 83 90 92 83 Dewpt 70 69 73 73 73 73 72 71 70 70 74 73 73 73 72 71 70 70 74 73 72 72 RH 97 97 70 54 54 74 87 90 93 93 72 52 54 74 87 93 93 97 74 58 52 70 Wind Dir SW N N E NE N N N N N N NE N NE NE NE NE NE N N N NW Wind Spd 1 0 0 1 2 1 0 0 0 0 0 1 2 2 2 1 1 1 0 0 1 1 Clouds FW SC FW SC SC SC SC FW SC SC CL B1 B1 B2 SC SC SC SC FW FW SC SC PoP 12hr 10 5 30 5 20 QPF 12hr 0 0 0.09 0 0.01 Rain shwrs S S Tstms S S Heat index 90101101 87 91102101 87 90 98100 88 Max heat 101 102 102 103 98 101 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 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 69 92 69 92 68 89 67 86 Temp 73 70 89 83 73 70 90 82 72 69 87 79 70 68 83 77 Dewpt 70 70 72 71 70 69 72 71 70 68 72 72 70 68 72 70 PWind Dir SW SW SW SW NW S NE NE Wind Char LT LT LT LT LT LT LT LT Avg Clouds SC SC SC SC SC SC SC SC B1 B1 B1 SC B1 B1 B1 SC PoP 12hr 10 10 5 40 20 60 30 50 Rain shwrs C S S L C C S C Tstms C S C S $$ TNZ099-172000- Chattanooga Airport-Hamilton TN 35.03N 85.22W Elev. 688 ft 226 AM EDT Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 97 73 98 72 97 Temp 74 72 86 94 97 89 80 77 75 74 88 96 98 89 80 77 75 73 87 95 96 87 Dewpt 69 69 70 70 69 70 71 70 70 70 72 70 69 70 71 71 71 71 72 70 69 71 RH 84 90 59 46 40 54 74 79 84 87 59 43 39 54 74 82 87 93 61 45 42 59 Wind Dir N N S NE NE NE N N N N N NE N N E NE N N SE NE S W Wind Spd 0 0 1 3 4 2 0 0 0 0 1 4 5 4 2 1 0 0 1 2 3 3 Clouds FW FW FW FW FW FW SC SC FW FW FW SC FW SC SC FW FW FW FW FW SC SC PoP 12hr 5 5 10 5 20 QPF 12hr 0 0 0 0 0 Rain shwrs S S S Tstms S S S Heat index 91100103 94 83 95103104 94 83 94102102 93 Max heat 100 103 89 103 104 89 102 103 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 72 95 71 96 70 93 69 89 Temp 75 72 92 86 75 72 93 86 74 71 90 83 72 70 86 81 Dewpt 71 70 70 70 70 70 70 70 70 69 71 71 70 69 70 69 PWind Dir S SW S S SE SE SE E Wind Char LT LT LT LT LT LT LT LT Avg Clouds SC SC FW SC SC SC FW SC B1 SC SC SC B1 B1 SC SC PoP 12hr 20 30 10 40 30 50 30 30 Rain shwrs S C C C S C C S S C Tstms S C C S C S S $$ NCZ060-172000- Tusquitee RAWS-Forestry-Cherokee NC 35.07N 84.12W Elev. 1600 ft 226 AM EDT Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 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 91 66 92 65 91 Temp 65 64 79 89 89 78 71 69 67 66 81 90 89 78 71 69 67 66 82 90 85 75 Dewpt 65 64 71 70 69 70 70 68 66 65 71 71 69 70 70 68 66 66 71 71 71 71 RH 100100 77 54 52 76 97 97 97 97 72 54 52 76 97 97 97100 69 54 63 87 Min/Max RH 49 97 50 100 54 Wind Dir N N NW NW N N N N N N N N N E N N N N N NW SE SE Wind Dir Deg 0 0 31 31 33 0 0 0 0 0 33 33 33 7 0 0 0 0 0 31 14 14 Wind Spd 0 0 1 3 2 0 0 0 0 0 1 3 3 1 0 0 0 0 0 2 2 2 Clouds SC B1 FW SC SC SC SC SC SC B1 CL FW SC SC SC SC SC SC FW SC SC SC Clouds (%) 28 54 17 48 37 40 38 44 35 53 5 24 28 27 42 37 33 42 21 40 43 40 Vsby 7 7 10 10 10 10 10 8 7 7 10 PoP 12hr 10 5 10 5 50 QPF 12hr 0 0 0 0 0.15 Rain shwrs C C S Tstms C C S Heat index 94 94 85 96 94 86 96 90 Max heat 94 96 96 97 96 96 ChanceThunder 10 5 10 5 40 Max Mix Hgt AGL Mix Hgt 5100 5600 5900 Max Vent Rt 25700 33300 29700 T Wind Dir N N NE T Wind Spd 4 5 4 ADI 26 33 30 Max LVORI 10 9 10 Stability F B B G G B B G G B B Ceiling NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE Sta Pres 28.20 28.14 28.09 28.09 28.08 28.03 27.99 27.98 27.96 27.95 27.92 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 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 64 89 63 89 63 86 62 83 Temp 68 65 88 78 67 64 87 77 66 64 84 75 66 62 81 73 Dewpt 68 65 71 70 67 64 70 70 66 64 71 70 66 62 70 68 PWind Dir SE SW N W E SE SE NE Wind Char LT LT LT LT LT LT LT LT Avg Clouds SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 B1 PoP 12hr 20 50 20 60 30 70 20 50 Rain shwrs S S C S S L C C C L S S C Tstms S C S C S C S S This is an experimental product for planning and review purposes only, and is not to be substituted for an official fire weather spot forecast $$