Point Forecast Matrices
Issued by NWS Knoxville/Tri Cities, TN
Issued by NWS Knoxville/Tri Cities, TN
989 FOUS54 KMRX 191827 PFMMRX Point Forecast Matrices National Weather Service Morristown TN 226 PM EDT Sat Sep 19 2026 TNZ017-200800- Tri Cities Airport-Sullivan TN 36.50N 82.41W Elev. 1536 ft 226 PM EDT Sat Sep 19 2026 Date 09/19/26 Sun 09/20/26 Mon 09/21/26 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 66 88 66 88 65 Temp 89 79 71 70 67 67 78 85 87 78 70 68 67 66 78 86 85 77 70 68 66 65 Dewpt 68 69 70 68 67 67 68 69 67 68 69 68 67 66 70 70 69 69 69 67 66 65 RH 50 72 97 93100100 71 59 52 71 97100100100 76 59 59 76 97 97100100 Wind Dir NW SE NE E N S SW W NW SE E N N E SW W W E E E E E Wind Spd 2 2 2 1 1 1 4 5 4 2 0 0 0 0 1 3 3 3 1 1 1 1 Clouds SC SC B1 SC SC SC FW FW FW FW SC SC SC SC SC SC SC B1 B1 B1 B1 B1 PoP 12hr 30 40 10 50 50 QPF 12hr 0.06 0.02 0 0.14 0.15 Rain shwrs C C C S C C C C C C C C L Tstms C C S C C C C S Obvis PF PF Heat index 93 89 90 90 89 Max heat 96 90 92 93 92 Date 09/22 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 Sat 09/26/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 82 62 78 59 75 57 75 53 74 Temp 80 72 66 63 74 70 62 60 71 69 60 58 72 67 56 54 71 66 Dewpt 70 68 65 63 68 65 61 60 66 63 60 58 63 60 56 54 58 56 PWind Dir SE E SE E E NE N NE N Wind Char LT LT LT LT LT LT LT LT LT Avg Clouds B2 B2 B2 B1 B2 B1 B1 B1 B1 SC SC SC B1 SC SC SC B1 SC PoP 12hr 80 70 70 60 40 20 30 10 5 Rain shwrs L D L L L L L C C C S C Tstms S C S C S $$ TNZ071-200800- Knoxville McGhee Tyson Airport-Blount TN 35.80N 83.98W Elev. 979 ft 226 PM EDT Sat Sep 19 2026 Date 09/19/26 Sun 09/20/26 Mon 09/21/26 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 70 93 70 92 69 Temp 93 83 77 73 71 70 81 90 92 84 76 73 72 70 81 89 91 82 75 72 70 69 Dewpt 67 69 71 70 69 69 70 70 68 69 71 70 69 69 72 71 70 70 71 70 69 69 RH 43 63 82 90 93 97 69 52 46 61 85 90 90 97 74 56 50 67 87 93 97100 Wind Dir NE NE E N SW S SW W NW S S S S S SW W NW E SE SE SE N Wind Spd 4 3 2 1 2 2 3 4 2 3 2 2 1 1 1 2 2 3 2 1 1 0 Clouds SC B1 B1 SC SC SC CL FW FW SC FW SC SC B1 SC SC SC B1 B1 B1 B1 B1 PoP 12hr 20 20 10 40 60 QPF 12hr 0 0 0 0.02 0.14 Rain shwrs S S S C C L L C C C Tstms S S S C C C S Heat index 97 87 85 96 96 88 85 95 97 86 Max heat 98 84 96 96 83 95 98 83 Date 09/22 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 Sat 09/26/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 87 67 82 64 78 62 79 58 78 Temp 86 77 70 67 80 74 67 65 76 73 65 62 76 72 62 59 76 71 Dewpt 72 71 69 67 72 70 67 65 69 67 64 62 66 64 61 59 63 61 PWind Dir NW E SW NE NW N N NE NE Wind Char LT LT LT LT LT LT LT LT LT Avg Clouds B1 B1 B1 B1 B1 B1 SC B1 B1 SC SC SC SC SC SC SC SC SC PoP 12hr 80 70 90 70 50 20 20 10 10 Rain shwrs C D L L L D L C C C S S Tstms S C S C C S $$ TNZ036-200800- Oak Ridge-Anderson TN 36.00N 84.24W Elev. 913 ft 226 PM EDT Sat Sep 19 2026 Date 09/19/26 Sun 09/20/26 Mon 09/21/26 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 70 92 69 92 68 Temp 91 80 75 72 70 70 80 89 90 79 74 72 70 70 80 89 90 81 73 71 69 68 Dewpt 70 70 72 71 70 70 71 71 69 70 72 70 69 69 73 72 71 71 71 70 69 68 RH 50 72 90 97100100 74 56 50 74 93 93 97 97 79 57 54 72 93 97100100 Wind Dir N E NE N SW SW SW SW NW SW N SW SW SW SW SW NW N N N N NW Wind Spd 1 1 1 0 1 2 4 3 1 1 0 1 1 1 1 1 1 1 1 0 0 1 Clouds B1 B1 SC SC FW SC FW FW SC FW SC SC B1 B1 SC SC SC B1 SC B1 B2 B1 PoP 12hr 20 20 10 50 60 QPF 12hr 0.01 0.02 0 0.04 0.12 Rain shwrs C S S C C L L C C C Tstms C S S C C C S Heat index 97 83 83 95 95 84 96 96 85 Max heat 98 95 96 96 98 Date 09/22 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 Sat 09/26/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 86 66 81 63 78 60 79 57 78 Temp 84 75 68 67 78 72 66 64 75 71 63 60 76 70 61 58 75 69 Dewpt 73 72 68 67 72 70 66 64 69 67 63 60 66 64 61 58 63 61 PWind Dir W NE W NW NW N N N NE Wind Char LT LT LT LT LT LT LT LT LT Avg Clouds B1 B1 B1 B1 B1 B1 SC B1 B1 SC SC SC SC SC SC SC SC SC PoP 12hr 80 70 90 60 50 10 20 10 10 Rain shwrs C D L L L D L C C C S Tstms S C S C C S S $$ TNZ099-200800- Chattanooga Airport-Hamilton TN 35.03N 85.22W Elev. 688 ft 226 PM EDT Sat Sep 19 2026 Date 09/19/26 Sun 09/20/26 Mon 09/21/26 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 72 96 72 96 70 Temp 94 86 79 75 73 72 84 93 94 84 78 75 73 72 84 93 95 86 77 73 72 70 Dewpt 69 69 72 71 71 71 70 70 68 69 72 71 71 71 73 70 69 70 72 71 71 70 RH 44 57 79 87 93 97 63 47 43 61 82 87 93 97 70 47 43 59 85 93 97100 Wind Dir NW NE N S S SE S S SW NE S S S N S W W SE S S SE S Wind Spd 4 2 0 1 2 2 3 2 2 2 1 1 1 0 1 1 3 2 1 1 1 1 Clouds B1 SC SC FW FW SC CL FW SC SC SC FW SC FW SC SC SC B1 B1 B1 B1 SC PoP 12hr 10 20 10 40 60 QPF 12hr 0 0 0 0.06 0.03 Rain shwrs C S C C L L C C S Tstms C S C C C S S Heat index 99 90 88 99 99 88 90 99101 91 Max heat 99 86 99 100 86 99 101 88 Date 09/22 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 Sat 09/26/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 92 69 86 65 83 63 83 60 82 Temp 90 81 71 69 83 78 68 66 80 76 66 64 81 76 64 61 80 75 Dewpt 72 72 70 69 71 70 67 65 68 67 65 63 66 64 62 60 62 61 PWind Dir S SE S S NE N N N N Wind Char LT LT LT LT LT LT LT LT LT Avg Clouds SC B1 B1 B1 SC SC SC SC B1 SC SC SC SC SC SC FW SC SC PoP 12hr 70 60 70 30 20 5 10 5 10 Rain shwrs S L L L C L C S Tstms C C C S $$ NCZ060-200800- Tusquitee RAWS-Forestry-Cherokee NC 35.07N 84.12W Elev. 1600 ft 226 PM EDT Sat Sep 19 2026 Date 09/19/26 Sun 09/20/26 Mon 09/21/26 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 65 90 65 90 63 Temp 92 78 70 68 66 65 78 88 85 75 70 68 66 65 79 89 84 75 69 67 65 64 Dewpt 69 72 70 68 66 65 69 71 70 70 70 68 66 65 72 70 69 69 69 67 65 64 RH 47 82100100100100 74 57 61 84100100100100 79 54 61 82100100100100 Max/Min RH 100 56 100 52 100 Wind Dir NE SE E E E E N NW SE N N N N N N NW NW N N N N E Wind Dir Deg 5 12 11 11 10 11 0 31 15 0 0 0 0 0 0 29 32 0 0 0 0 10 Wind Spd 3 1 1 1 1 1 0 2 2 0 0 0 0 0 0 2 1 0 0 0 0 1 Clouds B1 B1 SC SC SC SC FW FW B1 SC FW FW B1 B1 FW SC SC B1 B1 B1 B2 B2 Clouds (%) 64 59 47 29 44 48 9 21 53 29 10 23 65 67 23 47 48 51 58 69 70 76 Vsby 10 10 10 8 7 7 10 10 10 10 10 PoP 12hr 20 50 10 50 50 QPF 12hr 0.06 0.08 0 0.06 0.11 Rain shwrs C S C S C C C C C C C Tstms C S C S C C C S Obvis PF Heat index 97 94 90 94 88 Max heat 99 94 95 94 94 ChanceThunder 20 40 10 40 30 Max Mix Hgt AGL Mix Hgt 5200 5300 Max Vent Rt 21700 21300 T Wind Dir NE N T Wind Spd 4 3 ADI 22 21 Max LVORI 10 10 Stability B G G B B G F B B F F Ceiling NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE Sta Pres 27.93 27.91 27.92 27.88 27.85 27.88 27.89 27.87 27.83 27.89 27.90 Date 09/22 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 Sat 09/26/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 85 61 80 58 78 56 78 53 78 Temp 83 73 65 63 78 70 63 59 75 69 61 57 75 68 58 54 76 67 Dewpt 71 70 65 63 70 67 62 59 67 65 61 57 65 63 58 54 61 59 PWind Dir SE E SE SE W N NW N NW Wind Char LT LT LT LT LT LT LT LT LT Avg Clouds B1 B1 SC B1 B2 B1 SC B1 B2 SC SC SC B1 SC FW SC B1 SC PoP 12hr 90 40 70 40 40 20 20 10 20 Rain shwrs C D C C C L C S S C S S S Tstms S C S C S S 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 $$