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

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739
FOUS54 KSJT 181058
PFWSJT

FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE SAN ANGELO TX
458 AM CST THU DEC 18 2014
TXZ170-182215- MASON RAWS-MASON TX 30.74N 99.19W ELEV. 1463 FT 458 AM CST THU DEC 18 2014 DATE THU 12/18/14 FRI 12/19/14 SAT 12/20/14 UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 CST 3HRLY 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 MAX/MIN 69 48 55 40 59 TEMP 48 52 62 69 63 55 52 49 48 50 53 55 51 45 43 41 41 45 53 59 54 DEWPT 48 49 49 45 47 51 51 49 48 47 46 45 45 44 43 41 41 43 43 43 42 MIN/MAX RH 43 100 68 100 53 RH 99 87 64 43 57 85 97 99100 90 76 68 79 95100100100 94 69 54 64 WIND DIR W W NW N NE NE NE NE NE NE N N N N N N NE E SE SE SE WIND SPD 2 2 1 3 3 4 7 7 5 7 8 8 7 5 3 3 3 3 3 3 3 CLOUDS OV B2 B1 B1 B1 B2 OV OV OV B2 B2 B2 B1 B1 B1 B1 SC SC SC SC SC CLOUDS(%) 88 74 51 54 63 84 99 97 96 83 78 72 65 65 54 54 48 48 35 35 39 POP 12HR 10 70 60 5 5 QPF 12HR 0 0.27 0.23 0 0 RAIN SHWRS NM NM NM NM NM TSTMS IS IS IS IS IS OBVIS PF+ LAL 1 1 1 1 1 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 HAINES 6 5 5 5 5 5 3 3 3 3 3 3 3 3 3 2 2 2 2 2 2 MIX HGT <1 <1 2 3 <1 <1 <1 1 <1 <1 2 2 3 <1 <1 <1 <1 2 2 4 <1 T WIND DIR W W NW E E E E NE NE NE NE NE NE NE NE NE NE E E SE SE T WIND SPD 2 5 3 2 6 12 10 11 18 18 12 10 9 9 6 5 5 5 4 5 9 SMOKE DISP PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR PR DATE SUN 12/21/14 MON 12/22/14 TUE 12/23/14 WED 12/24/14 UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 CST 6HRLY 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 MIN/MAX 41 58 44 67 43 61 36 62 TEMP 44 42 53 54 46 45 60 60 47 44 55 54 40 37 54 56 DEWPT 43 42 45 44 43 45 44 39 40 38 32 27 24 23 25 26 MAX/MIN RH 100 59 100 38 86 28 59 25 RH 96 100 73 69 89 100 54 46 76 79 41 35 52 56 32 31 PWIND DIR SE S SW SW W N NW SW WIND CHAR <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS SC B1 SC SC FW FW FW FW FW FW FW FW FW CL CL CL POP 12HR 5 10 5 10 5 5 0 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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