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

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416
FOUS54 KSJT 271956
PFWSJT

FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE SAN ANGELO TX
256 PM CDT MON APR 27 2015
TXZ170-281030- MASON RAWS-MASON TX 30.74N 99.19W ELEV. 1463 FT 256 PM CDT MON APR 27 2015 DATE 04/27/15 TUE 04/28/15 WED 04/29/15 THU 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 52 62 44 73 46 TEMP 83 77 65 57 54 52 57 61 62 59 51 47 45 44 58 71 73 68 58 52 48 46 DEWPT 43 46 49 49 49 47 47 46 46 44 44 43 42 41 45 43 43 43 44 44 44 43 MAX/MIN RH 86 56 89 34 88 RH 25 33 56 74 82 84 69 58 56 57 76 85 88 89 62 37 34 40 61 75 86 88 WIND DIR W NW N N NW NW N N N N N NW NW NW NW N N N N E SW SW WIND SPD 8 8 10 10 10 12 14 16 15 12 7 4 4 5 10 10 9 7 3 1 2 3 CLOUDS SC SC B1 B2 B2 B2 B2 B2 B1 B1 SC SC FW FW FW FW FW FW FW CL CL FW CLOUDS(%) 37 39 58 76 81 85 82 78 67 60 44 27 24 20 19 17 14 11 11 5 5 12 POP 12HR 20 20 5 0 0 QPF 12HR 0.02 0.01 0 0 0 RAIN SHWRS IS IS IS IS IS IS IS IS IS TSTMS IS LAL 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 HAINES 6 5 3 3 3 3 2 3 2 3 2 3 2 3 3 5 4 5 4 4 4 4 MIX HGT 9 9 1 1 1 1 3 5 6 5 2 1 <1 <1 3 6 7 6 <1 <1 <1 <1 T WIND DIR W NW N N N N N N N N N N W W N N N N NE N SW W T WIND SPD 13 9 25 21 21 19 26 24 24 23 24 12 5 6 18 14 12 10 3 1 3 4 SMOKE DISP VG GD PR PR PR PR GD GD VG GD FR PR PR PR FR GD GD FR PR PR PR PR DATE 04/30 FRI 05/01/15 SAT 05/02/15 SUN 05/03/15 MON 05/04/15 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 78 52 81 56 81 59 83 64 83 TEMP 76 74 57 52 79 76 60 56 79 77 63 59 81 79 67 64 82 80 DEWPT 44 44 46 46 48 48 51 51 52 52 55 57 61 59 63 64 64 63 MIN/MAX RH 30 80 32 83 37 93 46 100 52 RH 32 34 66 80 34 37 71 83 39 42 75 93 51 50 86100 55 55 PWIND DIR W SE S S S S S S S WIND CHAR <15 <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS FW FW CL CL CL FW FW FW FW FW FW FW SC SC SC B1 B1 B1 POP 12HR 0 0 5 5 5 5 10 10 20 RAIN SHWRS IS IS TSTMS IS IS $$ 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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