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St. Francis National Forest Fire Weather Point Forecast Matrix
ARZ049-221000-
MARIANNA NFDRS SITE-LEE AR
34.76N 90.72W ELEV. 253 FT
254 PM CDT TUE MAY 21 2013
DATE 05/21/13 WED 05/22/13 THU 05/23/13 FRI
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 68 84 59 82 58
TEMP 79 73 70 70 69 68 73 80 82 80 69 63 61 61 74 80 81 77 66 62 60 59
DEWPT 70 69 69 68 67 67 66 64 62 61 62 60 60 61 62 61 61 62 63 61 58 56
MAX/MIN RH 92 48 80 42 84
RH 81 79 82 84 89 88 69 57 49 51 67 73 77 77 55 45 42 48 65 76 82 80
WIND DIR S S S S S S SW SW W W W NW N N NW NW N N NE NE NE NE
WIND SPD 13 12 10 9 10 9 9 9 10 6 5 5 5 5 5 6 8 4 5 8 6 6
CLOUDS B2 OV OV OV OV B1 SC FW FW CL CL FW FW FW FW FW FW FW FW FW FW FW
CLOUDS(%) 85100100 92 92 67 45 6 6 0 0 20 20 14 14 18 18 22 22 21 21 11
POP 12HR 80 50 10 10 5
QPF 12HR 1.19 0.16 0 0 0
RAIN SHWRS NM O O NM NM SC SC IS IS
TSTMS NM O O NM NM SC SC IS IS
MIXHGT M AGL 643 40 1733 1123 695 35 1859 2245 962 248
MIXHGT FT AGL 2109 132 5684 3685 2281 114 6099 7364 3155 813
MIXHGT M MSL 721 118 1811 1201 769 113 1937 2323 1039 326
MIXHGT FT MSL 2365 388 5940 3940 2522 370 6355 7620 3408 1069
TRANSWIND DIR SE SW SW SW S SW W NW NE NE
TWIND SPD M/S 2 5 7 8 4 3 7 7 5 8
TWIND SPD MPH 5 12 17 19 9 8 16 16 12 18
VENT INDEX 3924 14488 4372 16261 11032
CATEGORY DAY 3 4 3 4 4
500M MIXHGT T 83 82 79 79 80 80 79 81 75 67
500M TWND DIR S SW SW SW SW W NW N NE NE
500M TWND M/S 6 12 7 8 8 10 5 5 10 12
500M TWND MPH 14 28 17 18 19 23 12 11 23 27
DISPERSION 14 13 56 56 16 6 50 54 13 23
LAL 5 5 3 3 1 1 1 1 1 1
LASI 3 4 3 3 3 4 3 3 4 3
STABILITY D D C C F E B C F E
STAG INDEX 0 0 0 0
DATE 05/24 SAT 05/25/13 SUN 05/26/13 MON 05/27/13 TUE 05/28/13
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 77 55 82 62 84 63 87 66 86
TEMP 74 73 59 57 78 78 65 63 81 80 67 64 83 83 69 67 83 83
DEWPT 51 49 52 51 50 55 60 59 57 59 62 61 60 61 64 64 61 60
MIN/MAX RH 38 87 33 75 35 82 39 88 41
RH 41 42 72 83 37 37 61 73 37 39 67 79 42 44 74 85 45 45
WIND DIR NE E E SE S S S S S
WIND SPD 6 4 3 3 3 4 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 CHILL (F)......................WIND CHILL TEMPERATURE
HEAT INDEX (F)......................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
+PF............PATCHY DENSE FOG
F+.............DENSE FOG
H..............HAZE
BS.............BLOWING SNOW
K..............SMOKE
BD.............BLOWING DUST
MIXING HGT M (AGL)..................MIXING HEIGHT IN METERS
MIXING HGT FT (AGL).................MIXING HEIGHT IN FEET
TRANSWIND DIR (8 POINT COMPASS).....TRANSPORT WIND DIRECTION
TWIND SPD MS (M/S)..................TRANSPORT WIND SPEED IN METERS PER SECOND
TWIND SPD MPH (MPH).................TRANSPORT WIND SPEED IN MILES PER HOUR
VENT INDEX (M2/S)...................VENT INDEX IN METERS SQUARED PER SECOND
CATEGORY DAY........................CATEGORY DAY BASED ON VENT INDEX
EXAMPLE: 1 = <2000; 2 = >=2000 AND <4000; 3 = >=4000 AND <8000;
4 = >=8000 AND <16000; 5 = >=16000
500M MIXHGT T (F)...................SURFACE TEMPERATURE NEEDED TO CREATE MIXING
UP TO 500 METERS ABOVE THE GROUND
500M TWND DIR (8 POINT COMPASS).....TRANSPORT WIND DIRECTION AT 500 METERS AGL
500M TWND M/S.......................TRANSPORT WIND AT 500 METERS AGL IN M/S
500M TWND MPH.......................TRANSPORT WIND AT 500 METERS AGL IN MPH
LASI (SAME AS HAINES INDEX).........LOWER ATMOSPHERIC SEVERITY INDEX
MEASURES FIRE GROWTH POTENTIAL
EXAMPLE: 1-3 = VERY LOW; 4 = LOW; 5 = MODERATE; 6 = HIGH
STABILITY...........................STABILITY CLASS
EXAMPLE: A = VERY UNSTABLE; B = MODERATELY UNSTABLE; C = SLIGHTLY UNSTABLE
D = NEUTRAL; E = SLIGHTLY STABLE; F = MODERATELY STABLE
G = VERY STABLE
STAG INDEX..........................STAGNATION INDEX
EXAMPLE: 0 = WINDS >= 10 MPH; 1 = WINDS <= 10 MPH WITH RAIN
2 = DRY WITH DECENT WINDS
3 = DRY WITH LIGHT WINDS AND STAGNATE CONDITIONS
WATCH/WARNING/ADVISORY...
EXAMPLE: W = WARNING; Y = ADVISORY; A = WATCH
IN EFFECT FOR THE INDICATED HOUR
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