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

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031
FOUS54 KSJT 202041
PFWSJT

FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE SAN ANGELO TX
241 PM CST SAT DEC 20 2014
TXZ170-211015- MASON RAWS-MASON TX 30.74N 99.19W ELEV. 1463 FT 241 PM CST SAT DEC 20 2014 DATE 12/20/14 SUN 12/21/14 MON 12/22/14 TUE UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 CST 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 MIN/MAX 41 61 44 74 43 TEMP 55 51 45 43 42 43 46 55 61 56 49 46 45 47 51 65 74 65 52 47 45 44 DEWPT 42 42 42 39 38 40 43 45 46 46 45 45 45 46 47 44 40 39 42 40 40 37 MAX/MIN RH 97 57 100 29 86 RH 61 71 90 88 86 90 91 68 58 68 87 97100 97 85 47 29 38 68 76 83 75 WIND DIR SE E SE S S S S SW SW S S SW SW SW SW SW SW SW W W NW N WIND SPD 4 5 4 4 3 4 4 8 9 5 4 7 8 9 10 10 12 7 4 4 9 12 CLOUDS B2 B2 B2 B2 B2 OV B2 B1 B1 SC SC SC SC SC SC FW FW SC SC SC SC SC CLOUDS(%) 76 70 75 80 85 89 79 69 55 41 38 35 38 42 31 21 25 28 33 38 40 42 POP 12HR 5 5 5 5 10 QPF 12HR 0 0 0 0 0 OBVIS F F LAL 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 HAINES 4 4 3 4 4 3 4 4 4 5 5 5 5 5 5 5 4 4 6 5 6 5 MIX HGT 2 1 <1 <1 <1 <1 2 2 2 <1 <1 <1 <1 <1 1 2 4 <1 <1 <1 1 3 T WIND DIR E E SE SE S S SW SW SW S S SW SW SW SW SW SW SW SW SW NW N T WIND SPD 3 6 5 4 2 8 10 12 14 6 6 10 11 17 18 20 27 18 11 12 14 33 SMOKE DISP PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR GD PR PR PR PR GD DATE 12/23/14 WED 12/24/14 THU 12/25/14 FRI 12/26/14 SAT 12/27/14 UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 CST 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 MAX/MIN 57 34 60 40 67 43 64 36 54 TEMP 52 50 37 37 52 54 43 43 58 60 46 45 57 56 40 38 48 48 DEWPT 31 23 23 24 27 26 28 29 33 35 41 40 32 32 28 26 22 23 MIN/MAX RH 32 65 27 63 29 89 30 69 28 RH 44 35 58 60 37 34 56 59 39 40 83 82 38 41 62 61 35 38 PWIND DIR NW NW W SW S SW N N N WIND CHAR 15> <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS SC SC SC FW CL CL CL CL FW SC FW SC SC SC SC SC SC SC POP 12HR 10 0 5 5 5 0 5 5 5 $$ 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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