Point Forecast Matrices
Issued by NWS Knoxville/Tri Cities, TN
Issued by NWS Knoxville/Tri Cities, TN
203 FOUS54 KMRX 210538 PFMMRX Point Forecast Matrices National Weather Service Morristown TN 137 AM EDT Thu Aug 21 2025 TNZ017-212000- Tri Cities Airport-Sullivan TN 36.50N 82.41W Elev. 1536 ft 137 AM EDT Thu Aug 21 2025 Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 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 66 85 66 84 Temp 69 69 76 80 82 77 71 68 67 67 77 82 82 77 71 69 67 68 75 80 80 75 Dewpt 68 68 71 71 70 70 68 67 66 66 70 70 69 69 67 67 66 66 69 70 70 69 RH 97 97 85 74 67 79 90 97 97 97 79 67 65 76 87 93 97 93 82 72 72 82 Wind Dir N N NE N N N NE NE NE E E W NE SE SE SE SE SE S SW SW S Wind Spd 1 2 3 4 5 3 2 2 2 2 2 2 3 2 2 2 1 1 2 4 4 3 Clouds B1 SC B1 B1 B1 SC SC SC SC SC SC SC SC SC SC SC B1 SC SC SC SC SC PoP 12hr 40 20 30 20 70 QPF 12hr 0 0 0.03 0 0.15 Rain shwrs C C S C C S S C C L L C Tstms C C S C C S S C C C Obvis PF Heat index 84 86 86 86 83 83 Max heat 85 88 88 89 85 85 Date Sun 08/24/25 Mon 08/25/25 Tue 08/26/25 Wed 08/27/25 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 79 61 78 55 75 53 74 Temp 68 66 75 73 65 62 75 70 59 57 72 67 57 54 71 67 Dewpt 66 66 70 68 64 62 59 56 53 53 53 52 51 50 52 52 PWind Dir S SW SW W W W S NW Wind Char LT LT LT LT LT LT LT LT Avg Clouds B1 B2 B2 B1 SC SC SC FW SC SC SC SC SC B1 SC SC PoP 12hr 50 60 20 5 0 0 5 5 Rain shwrs C C L L S Tstms C C C C S $$ TNZ071-212000- Knoxville McGhee Tyson Airport-Blount TN 35.80N 83.98W Elev. 979 ft 137 AM EDT Thu Aug 21 2025 Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 87 70 88 70 86 Temp 72 71 78 85 86 81 75 73 71 70 80 85 86 80 75 72 71 70 78 83 82 77 Dewpt 70 70 72 73 72 71 70 69 69 69 72 73 72 71 71 70 69 69 72 73 72 71 RH 93 97 82 67 63 72 84 87 93 97 77 67 63 74 87 93 93 97 82 72 72 82 Wind Dir N NE NE N N N NE NE NE NE NE NW S S S S S SE SW SW SW S Wind Spd 2 3 4 5 5 5 3 3 2 2 2 2 3 3 2 2 2 1 2 3 4 3 Clouds B1 B1 B1 SC SC SC SC FW SC SC SC SC SC SC SC SC SC SC SC B1 SC B1 PoP 12hr 20 10 40 30 60 QPF 12hr 0 0 0.03 0.02 0.14 Rain shwrs S S C C C C S S L L C Tstms S S C C C S C C C Heat index 92 92 85 84 92 92 83 89 87 Max heat 92 94 92 93 89 89 Date Sun 08/24/25 Mon 08/25/25 Tue 08/26/25 Wed 08/27/25 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 69 84 63 82 60 78 58 77 Temp 72 70 80 77 68 64 79 74 64 61 76 71 62 59 75 70 Dewpt 69 69 72 69 65 62 59 58 56 56 56 54 54 54 56 54 PWind Dir SW W W NW N NW NE N Wind Char LT LT LT LT LT LT LT LT Avg Clouds B1 B1 B1 SC SC FW FW FW SC SC SC SC B1 SC SC SC PoP 12hr 50 50 10 0 0 0 5 5 Rain shwrs C C C C Tstms C C C C $$ TNZ036-212000- Oak Ridge-Anderson TN 36.00N 84.24W Elev. 913 ft 137 AM EDT Thu Aug 21 2025 Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 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 69 89 69 85 Temp 70 70 78 85 85 80 75 72 70 70 80 86 85 80 74 72 71 70 78 83 82 77 Dewpt 69 68 72 72 72 70 69 68 68 68 72 73 72 71 70 70 69 69 72 73 72 71 RH 97 93 82 65 65 72 82 87 93 93 77 65 65 74 87 93 93 97 82 72 72 82 Wind Dir NE NE NE NE N NE NE NE NE NE E SE NW E SW SW SW SW SW SW SW SW Wind Spd 2 2 3 3 4 3 3 2 2 2 2 2 2 2 1 1 1 1 2 2 2 2 Clouds SC B1 B1 SC B1 SC FW SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 SC PoP 12hr 10 5 40 20 60 QPF 12hr 0 0 0.04 0 0.15 Rain shwrs C C S S C C L L C Tstms C C S S C C C Heat index 91 91 83 84 93 91 83 89 87 Max heat 91 93 93 93 89 89 Date Sun 08/24/25 Mon 08/25/25 Tue 08/26/25 Wed 08/27/25 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 68 85 61 81 58 78 56 77 Temp 70 69 82 77 67 62 79 73 62 60 76 70 61 58 75 69 Dewpt 69 69 72 68 63 59 59 57 55 54 55 54 53 53 55 54 PWind Dir SW W NW NW NW NW N N Wind Char LT LT LT LT LT LT LT LT Avg Clouds B1 B2 B1 SC FW FW FW FW SC SC SC SC B1 B1 SC SC PoP 12hr 50 40 5 0 0 0 5 5 Rain shwrs C C C C Tstms C C C C $$ TNZ099-212000- Chattanooga Airport-Hamilton TN 35.03N 85.22W Elev. 688 ft 137 AM EDT Thu Aug 21 2025 Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 89 70 88 70 86 Temp 72 72 80 85 87 82 76 73 72 72 80 84 83 79 74 72 71 71 78 82 82 77 Dewpt 70 70 73 74 72 72 71 71 70 70 73 74 73 73 72 71 71 71 73 73 72 72 RH 93 93 79 70 61 72 85 93 93 93 79 72 72 82 93 97100100 85 74 72 85 Wind Dir N N N N N N N NE NE NE E S SE E S S SE SE SE S S SE Wind Spd 2 3 4 4 5 4 3 2 2 2 2 3 4 3 2 1 1 1 2 3 4 3 Clouds SC B1 B2 B1 SC SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 B1 SC SC PoP 12hr 10 5 60 20 60 QPF 12hr 0 0 0.16 0.08 0.19 Rain shwrs S S L L S S C C L L C Tstms S C C S S S C C C Heat index 84 93 94 87 84 91 89 87 87 Max heat 93 94 91 91 87 89 Date Sun 08/24/25 Mon 08/25/25 Tue 08/26/25 Wed 08/27/25 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 69 86 64 84 61 79 60 78 Temp 72 70 83 78 69 65 81 74 66 62 77 71 63 60 75 71 Dewpt 71 70 72 69 66 62 59 59 57 57 57 57 56 54 57 56 PWind Dir S NW NW N N N N N Wind Char LT LT LT LT LT LT LT LT Avg Clouds SC B1 B1 SC FW FW CL FW SC SC SC SC B1 SC SC SC PoP 12hr 30 40 5 0 0 5 5 10 Rain shwrs C C C C Tstms C C C C $$ NCZ060-212000- Tusquitee RAWS-Forestry-Cherokee NC 35.07N 84.12W Elev. 1600 ft 137 AM EDT Thu Aug 21 2025 Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 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 66 84 66 83 Temp 67 67 78 85 83 76 70 68 67 67 76 81 79 73 69 67 66 67 75 80 78 72 Dewpt 67 67 72 71 70 70 69 68 67 67 71 71 70 70 68 67 66 66 70 70 70 69 RH 100100 82 63 65 82 97100100100 85 72 74 90 97100100 97 84 72 76 90 Min/Max RH 63 100 72 100 72 Wind Dir N N NW NW NW SW SE SE E E SE SE SE SE SE SE E E SE S S SE Wind Dir Deg 0 0 29 29 30 20 14 12 11 11 13 15 15 12 12 12 11 11 14 17 16 14 Wind Spd 0 0 1 3 3 2 1 1 1 1 2 3 3 2 2 1 1 1 2 3 3 2 Clouds B1 B2 B1 SC B1 B1 SC B1 B1 B2 B1 B1 B1 B1 SC B1 B1 B1 SC B1 B1 B1 Clouds (%) 67 80 55 45 51 56 41 61 64 73 53 60 58 51 48 58 63 65 48 56 56 53 Vsby 5 7 10 10 10 10 10 9 7 7 10 6 6 10 10 10 7 7 10 6 PoP 12hr 40 20 70 30 70 QPF 12hr 0.02 0 0.33 0.02 0.21 Rain shwrs C C S C C L L C C S S C C L L C Tstms C C S C C L C S C C C Obvis F Heat index 90 87 85 83 Max heat 90 90 85 85 83 83 ChanceThunder 40 20 60 30 50 Max Mix Hgt AGL Mix Hgt 4700 3300 3300 Max Vent Rt 20000 16000 19200 T Wind Dir NW SE SE T Wind Spd 3 4 5 ADI 20 16 20 Max LVORI 10 10 8 Stability D A B F F B B F F B B Ceiling NONE NONE NONE NONE NONE NONE NONE NONE 6900 16400 NONE Sta Pres 27.79 27.79 27.78 27.82 27.86 27.89 27.87 27.89 27.90 27.90 27.86 Date Sun 08/24/25 Mon 08/25/25 Tue 08/26/25 Wed 08/27/25 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 82 60 82 55 78 54 77 Temp 67 66 78 72 64 61 79 69 60 57 75 66 58 55 74 65 Dewpt 66 66 70 67 64 60 58 57 56 54 55 54 53 52 55 54 PWind Dir SE NW NW NW NW NW N N Wind Char LT LT LT LT LT LT LT LT Avg Clouds B1 B2 B1 SC SC SC FW FW SC SC SC SC B1 B1 SC SC PoP 12hr 50 60 10 5 0 5 10 10 Rain shwrs C C C L Tstms C S C L This is an experimental product for planning and review purposes only, and is not to be substituted for an official fire weather spot forecast $$