Fire Weather Point Forecast Matrices
Mason RAWS
Issued by NWS San Angelo, TX

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FOUS54 KSJT 152033
PFWSJT

FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE SAN ANGELO TX
333 PM CDT FRI MAY 15 2015
TXZ170-161130- MASON RAWS-MASON TX 30.74N 99.19W ELEV. 1463 FT 333 PM CDT FRI MAY 15 2015 DATE 05/15/15 SAT 05/16/15 SUN 05/17/15 MON UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 CDT 3HRLY 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 MIN/MAX 69 82 68 83 68 TEMP 79 78 73 71 70 69 72 77 82 80 73 71 70 68 72 77 83 81 73 71 70 68 DEWPT 65 66 67 67 67 67 67 67 67 68 69 69 68 67 67 67 68 69 69 69 68 67 MAX/MIN RH 94 60 100 60 100 RH 62 67 82 86 89 94 83 71 61 66 86 92 93 97 84 71 61 68 86 92 94 98 WIND DIR S SE SE S S S S S S S S S SE SE SE SE SE SE SE SE S S WIND SPD 12 10 9 9 10 10 11 15 15 12 11 10 8 5 7 9 9 9 8 8 7 7 CLOUDS B1 B1 B1 B1 B1 B2 B2 B1 B1 B1 B1 B2 B2 B2 B2 B2 B2 B1 B1 B2 B2 B2 CLOUDS(%) 68 61 61 66 66 75 75 65 65 60 60 81 81 79 79 74 74 69 69 73 73 71 POP 12HR 20 40 70 70 40 QPF 12HR 0.03 0.07 1.00 0.20 0.15 RAIN SHWRS NM IS IS IS IS SC SC SC SC NM NM NM NM NM NM NM NM SC SC SC SC SC TSTMS NM IS IS IS IS SC SC SC SC NM NM NM NM NM NM NM NM SC SC SC SC SC LAL 4 2 2 2 2 3 3 3 3 4 4 4 4 4 4 4 4 3 3 3 3 3 HAINES 3 3 3 3 3 3 3 3 3 3 5 5 5 5 3 3 3 3 3 3 4 4 MIX HGT 3 3 3 2 1 <1 2 4 3 3 2 1 <1 <1 2 4 4 4 3 3 1 <1 T WIND DIR S S S S S S S S S S S S S S S S S S S S S S T WIND SPD 21 20 26 29 23 16 23 29 27 24 25 24 16 9 12 17 16 16 20 24 17 9 SMOKE DISP VG GD PR PR PR PR FR FR GD VG PR PR PR PR PR PR GD GD PR PR PR PR DATE 05/18 TUE 05/19/15 WED 05/20/15 THU 05/21/15 FRI 05/22/15 UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 CDT 6HRLY 13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 MAX/MIN 84 67 81 68 83 68 83 66 81 TEMP 78 82 71 67 76 79 71 68 77 81 71 68 77 80 70 66 75 79 DEWPT 69 68 68 66 69 68 67 66 67 67 67 66 66 66 64 64 66 67 MIN/MAX RH 58 99 64 96 59 93 56 96 63 RH 74 64 90 96 79 68 87 93 71 64 86 93 68 61 82 93 74 67 PWIND DIR SE SE SE SE S SE SE SE SE WIND CHAR <15 <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS B2 B2 B1 B2 B2 B1 B1 B1 B1 B1 B1 B1 B2 B1 B1 B1 B2 B1 POP 12HR 50 40 40 20 30 30 30 30 30 RAIN SHWRS SC SC SC SC SC SC IS IS SC SC SC SC SC SC SC SC SC SC TSTMS SC SC SC SC SC SC IS IS SC SC SC SC SC SC SC SC SC SC $$ BELOW IS A WEATHER ELEMENT KEY FOR THIS PRODUCT DAY 1 THROUGH 3... MAX/MIN TEMP OR MIN/MAX TEMP(F).....MAXIMUM/MINIMUM AIR TEMPERATURE TEMP(F).............................AIR TEMPERATURE DEWPT(F)............................DEW POINT TEMPERATURE MIN/MAX RH OR MAX/MIN RH(%).........MAXIMUM/MINIMUM HUMIDITY RH(%)...............................RELATIVE HUMIDITY WIND DIR(8 POINT COMPASS)...........20 FT. WIND DIRECTION WIND SPD(MPH).......................20 FT. WIND SPEED WIND GUST(MPH)......................20 FT. WIND GUST WIND CHILL..........................WIND CHILL TEMPERATURE HEAT INDX...........................HEAT INDEX CLOUDS(CAT).........................CLOUD COVER CATEGORY EXAMPLE: CL = CLEAR; FW = FEW; SC = SCATTERED; B1 = MOSTLY CLOUDY; B2 = CONSIDERABLE CLOUDS; OV = OVERCAST CLOUDS(%)...........................CLOUD COVER AS A PERCENTAGE POP 12HR(%).........................PROBABILITY FOR ACCUMULATING PRECIPITATION QPF 12HR(IN)........................LIQUID EQUIVALENT PRECIPITATION AMOUNT WEATHER... TYPE... RAIN...........RAIN RAIN SHWRS.....RAIN SHOWERS TSTMS..........THUNDERSTORMS DRIZZLE........DRIZZLE SNOW...........SNOW SNOWSHWRS......SNOW SHOWERS SLEET..........SLEET FLURRIES.......FLURRIES FRZG RAIN......FREEZING RAIN FRZG DRZL......FREEZING DRIZZLE COVERAGE... IS.............ISOLATED SC.............SCATTERED NM.............NUMEROUS O..............OCCASIONAL S..............SLIGHT CHANCE C..............CHANCE L..............LIKELY WD.............WIDESPREAD D..............DEFINITE AR.............AREAS PA.............PATCHY OBVIS...............................OBSTRUCTION TO VISIBILITY TYPE... F..............FOG PF.............PATCHY FOG F+.............DENSE FOG H..............HAZE BS.............BLOWING SNOW K..............SMOKE BD.............BLOWING DUST AF.............VOLCANIC ASHFALL LAL(CAT)............................LIGHTNING ACTIVITY LEVEL HAINES(CAT).........................HAINES INDEX 10K WIND DIR(8 POINT COMPASS).......10000 FOOT WIND DIRECTION 10K WIND SPD(MPH)...................10000 FOOT WIND SPEED MIX HGT(THOUSANDS OF FT AGL)........MIXING HEIGHT EXAMPLE: 6 = 6000 FEET; 12 = 12000 FEET; <1 = LESS THAN 1000 FEET T WIND DIR(8 POINT COMPASS).........TRANSPORT WIND DIRECTION T WIND SPD(MPH).....................TRANSPORT WIND SPEED SMOKE DISP(CAT(KT-FT))...................SMOKE DISPERSION CATEGORY EXAMPLE: PR = POOR; FR = FAIR; GD = GOOD; VG = VERY GOOD; EX = EXCELLENT FOSBERG.............................FOSBERG FIRE WEATHER INDEX WATCH/WARNING/ADVISORY... EXAMPLE: W = WARNING; Y = ADVISORY; A = WATCH IN EFFECT FOR THE INDICATED HOUR DAY 4 THROUGH 7... MAX/MIN TEMP OR MIN/MAX TEMP(F).....MAXIMUM/MINIMUM AIR TEMPERATURE TEMP(F).............................AIR TEMPERATURE DEWPT(F)............................DEW POINT TEMPERATURE RH(%)...............................RELATIVE HUMIDITY WIND SPD(MPH).......................20 FT. WIND SPEED EXAMPLE: <15 = LESS THAN 15 MPH; 15> = 15 MPH OR GREATER AVE CLOUDS(CAT).....................AVERAGE CLOUD COVER CATEGORY POP 12HR(%).........................PROBABILITY FOR ACCUMULATING PRECIPITATION WEATHER... SEE DAY 1 THROUGH 3 WEATHER DESCRIPTIONS

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