Point Forecast Matrices
Issued by NWS Knoxville/Tri Cities, TN
Issued by NWS Knoxville/Tri Cities, TN
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505 FOUS54 KMRX 181827 PFMMRX Point Forecast Matrices National Weather Service Morristown TN 226 PM EDT Fri Sep 18 2026 TNZ017-190800- Tri Cities Airport-Sullivan TN 36.50N 82.41W Elev. 1536 ft 226 PM EDT Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 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 67 88 66 87 65 Temp 87 77 71 69 68 68 77 85 87 79 71 69 67 67 77 84 86 78 70 68 67 66 Dewpt 71 71 71 69 68 68 72 70 69 70 69 68 67 67 71 71 71 70 70 68 67 66 RH 59 82100100100100 85 61 55 74 93 97100100 82 65 61 76100100100100 Wind Dir W SE N N NE E N NW NE E SE E E E SW SW SW SE SE N N SE Wind Spd 4 1 0 0 1 1 0 2 2 2 3 2 1 1 3 4 3 2 0 0 0 0 Clouds B1 B1 B1 SC SC B1 SC SC SC SC SC FW CL FW SC SC SC SC SC SC SC B1 PoP 12hr 30 30 20 50 30 QPF 12hr 0.03 0.04 0.01 0.15 0.03 Rain shwrs C C S S S S C C C C Tstms C S S S S C C S S Heat index 92 90 92 89 91 Max heat 96 91 94 91 94 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 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 65 83 63 77 59 75 56 75 Temp 85 77 68 66 79 73 65 63 74 70 61 60 72 67 59 58 72 68 Dewpt 71 70 67 66 70 68 65 63 68 65 61 60 65 63 59 58 62 61 PWind Dir SW E S E SE E N NE N Wind Char LT LT LT LT LT LT LT LT LT Avg Clouds SC SC SC B1 B2 B1 B1 B1 B2 B1 B1 B1 B2 B1 SC SC B1 SC PoP 12hr 50 50 80 60 60 40 30 10 20 Rain shwrs C C C C D L C C L C S C C S Tstms C C S C C S $$ TNZ071-190800- Knoxville McGhee Tyson Airport-Blount TN 35.80N 83.98W Elev. 979 ft 226 PM EDT Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 71 94 70 92 69 Temp 95 85 78 74 72 71 82 91 93 84 77 73 72 71 81 90 91 84 76 73 71 70 Dewpt 71 71 71 71 70 70 73 72 71 71 71 70 69 69 72 72 71 71 71 70 69 69 RH 46 63 79 90 93 97 74 54 49 65 82 90 90 93 74 56 52 65 85 90 93 97 Wind Dir N NE E NE NE E N N N E SE SW SW SW SW SW SW S S S S S Wind Spd 4 3 2 2 1 2 1 3 4 3 2 2 1 1 2 4 3 3 2 1 1 1 Clouds B1 SC SC SC SC FW FW FW FW SC SC SC FW FW FW SC SC SC SC SC SC SC PoP 12hr 10 30 20 30 30 QPF 12hr 0 0.06 0 0 0.02 Rain shwrs S S S C C C C Tstms S S S C C S Heat index 103 90 87 99100 89 85 97 98 89 Max heat 103 85 99 100 83 97 99 85 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 92 69 87 67 83 64 79 61 79 Temp 91 82 72 69 84 77 70 67 80 75 67 64 77 73 65 62 77 72 Dewpt 72 71 70 69 72 71 69 67 71 69 66 64 68 66 64 62 65 65 PWind Dir W SE W SE NW N N NE N Wind Char LT LT LT LT LT LT LT LT LT Avg Clouds SC SC B1 B1 B1 B1 B1 B1 B1 B1 SC B1 B1 SC SC SC B1 SC PoP 12hr 40 50 70 70 70 40 30 10 10 Rain shwrs C C C C L L L C L C S S C Tstms C C C C S $$ TNZ036-190800- Oak Ridge-Anderson TN 36.00N 84.24W Elev. 913 ft 226 PM EDT Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 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 68 Temp 92 81 75 73 71 70 82 91 89 80 74 72 71 70 80 89 91 82 74 72 70 69 Dewpt 73 73 72 71 70 70 74 74 74 73 72 71 70 70 73 73 73 73 71 70 69 69 RH 54 77 90 93 97100 77 58 61 79 93 97 97100 79 59 56 74 90 93 97100 Wind Dir N N NE NE NE NE N NW N E NE N SW SW SW SW SW SE N N N N Wind Spd 1 2 1 1 1 1 0 1 2 1 1 0 1 1 4 3 1 1 0 0 0 0 Clouds SC B1 SC SC SC FW CL SC SC SC SC SC SC FW SC SC SC SC SC SC B1 B1 PoP 12hr 10 30 10 20 30 QPF 12hr 0 0.14 0 0 0.06 Rain shwrs C C S S C C Tstms C C S S S Heat index 101 86 88101 98 84 84 97100 87 Max heat 103 101 101 97 100 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 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 91 68 85 66 82 63 78 60 78 Temp 88 80 71 68 82 75 68 66 78 73 66 63 76 71 63 61 75 70 Dewpt 73 72 70 68 73 71 68 66 72 69 66 63 68 66 63 61 66 65 PWind Dir SW NE W NE NW N N N NE Wind Char LT LT LT LT LT LT LT LT LT Avg Clouds SC SC B1 B1 B1 B1 B1 B1 B1 B1 SC B1 B1 SC SC SC B1 SC PoP 12hr 50 50 80 70 60 30 30 5 10 Rain shwrs C C C C D L C C L C S S C Tstms C C S C C S $$ TNZ099-190800- Chattanooga Airport-Hamilton TN 35.03N 85.22W Elev. 688 ft 226 PM EDT Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 74 98 72 96 71 Temp 97 89 81 77 75 74 86 96 94 84 79 75 73 72 83 93 95 86 78 75 73 72 Dewpt 69 71 71 71 71 71 72 71 70 72 72 72 71 71 73 72 70 72 72 71 71 71 RH 40 56 72 82 87 90 63 45 46 67 79 90 93 97 72 51 45 63 82 87 93 97 Wind Dir N N N N SE NE NE N W SE E S S S S S S SE S S S N Wind Spd 4 3 2 1 1 1 1 2 4 2 1 2 2 2 4 2 2 2 1 1 1 0 Clouds FW SC SC FW FW FW CL FW B1 B1 SC FW FW FW FW FW SC SC SC SC SC SC PoP 12hr 5 40 20 30 20 QPF 12hr 0 0.10 0.01 0.04 0 Rain shwrs C S C C S S Tstms C S S C S S Heat index 103 95 85 92104100 90 89101102 92 Max heat 103 90 104 104 87 101 103 88 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 96 70 92 68 87 64 85 62 84 Temp 93 86 73 71 89 82 71 69 83 79 68 65 82 77 66 63 81 77 Dewpt 71 71 71 70 71 71 70 68 70 69 66 63 66 65 63 61 65 65 PWind Dir W NE S SE W N N N N Wind Char LT LT LT LT LT LT LT LT LT Avg Clouds FW SC SC SC SC SC SC B1 SC SC SC SC SC SC SC SC SC SC PoP 12hr 50 50 70 50 50 20 10 5 10 Rain shwrs C C C L C S C C S Tstms C C C S S $$ NCZ060-190800- Tusquitee RAWS-Forestry-Cherokee NC 35.07N 84.12W Elev. 1600 ft 226 PM EDT Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 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 92 65 90 63 Temp 89 78 72 69 67 66 81 90 87 76 70 68 67 65 79 88 84 74 69 67 66 64 Dewpt 69 70 69 68 66 66 71 70 70 70 70 68 67 65 72 72 71 71 69 67 66 64 RH 52 76 90 97 97100 72 52 57 82100100100100 79 59 65 90100100100100 Max/Min RH 100 50 100 59 100 Wind Dir N N N N N N N N E SE SE SE E E N W S N N N N N Wind Dir Deg 33 1 0 0 0 0 0 0 7 13 12 12 11 11 0 25 18 0 0 0 0 0 Wind Spd 4 2 0 0 0 0 0 3 3 1 2 1 1 1 0 2 2 0 0 0 0 0 Clouds B1 SC FW FW SC B1 FW B1 SC SC B1 SC B1 B1 SC SC SC SC SC SC SC B1 Clouds (%) 52 27 14 24 33 52 14 57 45 46 52 38 59 57 29 45 41 39 40 37 49 59 Vsby 10 10 10 7 7 7 10 10 10 10 10 PoP 12hr 5 40 20 70 10 QPF 12hr 0 0.04 0 0.20 0 Rain shwrs S C S L L C Tstms S C S C C Heat index 94 85 96 92 95 89 Max heat 98 96 97 95 95 ChanceThunder 5 40 20 40 10 Max Mix Hgt AGL Mix Hgt 5300 4900 Max Vent Rt 31200 24700 T Wind Dir N S T Wind Spd 4 4 ADI 31 25 Max LVORI 10 10 Stability B G F B B G F B B G F Ceiling NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE NONE Sta Pres 27.97 27.96 27.94 27.93 27.93 27.91 27.93 27.89 27.87 27.88 27.90 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 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 89 63 85 61 81 58 79 56 78 Temp 88 77 67 64 83 74 65 62 79 71 62 59 77 69 60 57 76 68 Dewpt 71 70 67 64 71 70 65 62 70 67 62 59 66 65 60 57 65 63 PWind Dir N N S SE S E NW N NW Wind Char LT LT LT LT LT LT LT LT LT Avg Clouds SC SC SC B1 B2 B1 SC B1 B2 B1 SC B1 B2 SC SC SC B1 SC PoP 12hr 70 50 80 50 60 20 30 10 20 Rain shwrs C L C C C D C C C L S C S Tstms C C S C C 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 $$