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St. Francis National Forest Fire Weather Point Forecast Matrix
ARZ049-291000-
ST FRANCIS SITE-LEE AR
34.76N 90.72W ELEV. 300 FT
308 PM CDT THU AUG 28 2008
DATE 08/28/08 FRI 08/29/08 SAT 08/30/08 SUN
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 71 93 70 91 70
TEMP 91 89 80 77 74 72 84 90 92 88 79 76 72 71 82 88 90 86 78 75 72 71
DEWPT 69 74 71 70 70 69 72 72 72 72 72 71 70 70 71 67 65 69 70 71 71 71
MAX/MIN RH 91 52 99 43 99
RH 49 62 74 79 87 90 68 56 52 58 77 85 91 99 70 49 43 57 77 88 95 99
WIND DIR SW SW S SW SW SW NW NE NE NE SE NE NE N NE NE NE NE NE NE NE E
WIND SPD 3 2 2 2 2 1 2 2 4 6 3 3 2 3 5 5 6 4 3 2 2 3
HEAT INDEX 96 97 84 89 97100 95 86 91 92 91
CLOUDS SC FW FW FW FW SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC SC
CLOUDS(%) 30 20 20 20 20 30 30 53 53 60 60 60 60 60 60 60 60 29 29 29 29 44
POP 12HR 5 20 20 20 10
QPF 12HR 0 0.01 0.04 0.08 0
RAIN SHWRS IS IS IS IS IS IS IS IS IS IS IS IS
TSTMS IS IS IS IS IS IS IS IS IS IS IS IS
OBVIS PF PF
MIXHGT M AGL 1190 12 2243 2981 0 0 2398 2703 182 0
MIXHGT FT AGL 3904 41 7359 9780 0 0 7868 8868 596 0
MIXHGT M MSL 1268 89 2321 3059 53 55 2476 2781 251 45
MIXHGT FT MSL 4160 293 7615 10037 173 182 8124 9124 822 149
TRANSWIND DIR S SW N NE NE NE NE NE NE NE
TWIND SPD MS 2 1 2 3 3 2 3 5 3 3
TWIND SPD MPH 4 3 5 6 6 4 8 11 8 6
VENT INDEX 3740 9177 231 11124 1725
CATEGORY DAY 2 3 1 4 2
500M MIXHGT T 91 90 90 94 91 88 88 93 92 90
500M TWND DIR SW W N NE NE NE NE NE NE E
500M TWND M/S 4 2 1 4 7 7 4 4 10 8
500M TWND MPH 9 5 3 9 17 17 9 9 23 18
DISPERSION 2 3 19 11 7 5 32 29 7 7
LASI 4 4 4 4 4 4 3 4 4 4
STABILITY F E A C F E B C F E
STAG INDEX 3 2 0 0 0
DATE 08/31 MON 09/01/08 TUE 09/02/08 WED 09/03/08 THU 09/04/08
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 92 71 91 71 87 70 86 68 86
TEMP 88 87 76 72 88 86 77 72 85 83 75 71 84 82 74 69 83 82
DEWPT 72 74 70 70 70 70 69 68 68 69 70 71 73 74 72 69 69 67
MIN/MAX RH 55 93 52 88 55 100 67 100 57
RH 59 64 81 93 55 59 77 88 58 62 85 100 70 77 95 100 63 62
WIND DIR E E E E E SE SE SE S
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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