Fire Weather Point Forecast Matrices
Issued by NWS Memphis, TN

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000
FOUS54 KMEG 052125
PFWMEG

Fire Weather Point Forecast Matrices
National Weather Service Memphis TN
325 PM CST Mon Dec 5 2022

MSZ002-061000-
WINBORN NFDRS SITE-MARSHALL MS
34.69N  89.30W Elev. 500 ft
325 PM CST Mon Dec 5 2022

Date           12/05/22      Tue 12/06/22            Wed 12/07/22            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
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 Temp                 56          70          60          69          58
Temp             57 60 62 63 63 66 68 70 66 65 64 63 63 66 68 69 65 63 62 60 59
Dewpt            57 60 62 63 63 66 67 67 66 65 64 63 63 66 66 65 64 63 62 59 59
Min/Max RH                  100          90         100          87         100
RH              100100100100100100 97 90100100100100100100 93 87 97100100 96100
Wind Dir         SE  S  S  S  S  S SW SW  S  S  S  S  S SW SW SW SW SE SE SE  S
Wind Spd          4  4  5  8  6  6  8  8  5  5  4  4  4  5  5  5  2  2  1  2  3
Wind Gust                    18 20 19 20 16                16
Clouds           OV OV OV OV OV OV OV B2 OV B2 OV OV OV OV OV B2 B2 B2 B2 OV B2
Clouds(%)       100 96 99 97100 99 90 76 90 87 91 93 93 91 92 86 84 82 86 90 81
Pop 12hr                     80          60          70          80          70
QPF 12hr                   0.27        0.06        0.10        0.21        0.25
RAIN
RAIN SHWRS        O NM NM NM SC NM SC SC SC SC NM NM  O  O NM NM NM NM NM NM NM
TSTMS            IS IS IS IS IS IS       IS IS IS IS SC SC IS IS IS IS
Obvis             F PF PF PF PF PF
T Wind Dir        S  S  S SW SW SW SW SW  S  S  S  S  S SW SW  N NE NE  E  E  E
T Wind Spd       11 11 13 18 20 21 23 20 18 14 13 12 11 10 12 10 10  6  3  6  8
MixHgt M AGL          132   216   395   417   183   137   451   439    66    26
MixHgt FT AGL         433   709  1296  1368   601   450  1480  1441   215    86
MixHgt M MSL          254   338   517   539   305   259   573   561   187   148
MixHgt FT MSL         833  1109  1696  1768  1001   850  1880  1842   615   486
Transwind Dir           S    SW    SW    SW     S     S    SW     N    NE     E
Twind Spd m/s           5     8     9     9     6     5     5     5     3     3
Twind Spd mph          11    19    21    20    14    12    11    11     6     6
Vent Index                 2289        4851        2100        2865         705
Category Day                  2           3           2           2           1
500M MixHgt T          70    69    69    70    68    68    66    64    64    66
500M Twnd Dir          SW    SW    SW    SW    SW    SW     N    NE     E     E
500M Twnd m/s          13    12     9     7     7     7     3     3     5     3
500M TWND mph          29    28    20    17    17    16     6     6    11     8
Dispersion             19    29    41    26    12    17    23     8     4     7
LAL                     2     2     2     2     2     3     3     2     2     1
LASI                    3     3     3     3     3     3     3     3     3     3
Stability               D     D     D     C     D     D     C     C     D     D
Stag Index                    1           3           3           1           1


Date           12/08/22  Fri 12/09/22  Sat 12/10/22  Sun 12/11/22  Mon 12/12/22
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 Temp     71      54    62      42    53      41    54      44    57
Temp          68 65 63   58 61 53 46   43 49 47 43   42 51 49 47   47 54 52
Dewpt         65 63 63   58 50 46 44   41 43 43 42   42 45 46 47   47 49 49
RH            90 93100  100 67 77 93   93 80 86 96  100 80 89100  100 83 89
Wind Dir         SW      SW    NW       N     N      NE     E      SE     S
Wind Spd        <15     <15   <15     <15   <15     <15   <15     <15   <15
Avg Clouds    B2 B1 B1   B2 B1 SC B1   B2 B2 B2 B2   B2 B2 B2 B2   B2 B2 B2
Pop 12hr         60      80    20      20    30      40    40      50    50
RAIN SHWRS    NM SC  O    O IS         IS SC SC SC   SC SC SC SC   SC SC SC
TSTMS                    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 Chill (F)......................Wind Chill
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 precipitaton 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
MixHgt M AGL........................Mixing Height in meters above ground level
MixHgt FT AGL.......................Mixing Height in feet above ground level
MixHgt M MSL........................Mixing Height in meters mean sea level
MixHgt FT MSL.......................Mixing Height in feet mean sea level
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
Dispersion..........................Dispersion Index for Smoke Dispersion
     Example: 1-6 = VERY POOR; 7-12 = POOR; 13-20 = GENERALLY POOR
              21-40 = FAIR; 41-60 = GENERALLY GOOD; 61-100 = GOOD
              101+ = EXCELLENT
LAL.................................Lightning Activity Level
     Example: 1 = No Thunderstorms; 2 = Isolated Thunderstorms
              3 = Widely Scattered Thunderstorms; 4 = Scattered Thunderstorms
              5 = Numerous Thunderstorms; 6 = Dry Lightning with no rain
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

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 Dir (8 point compass)..........20 ft. Wind Direction
Wind Spd (MPH)......................20 ft. Wind Speed
Avg Clouds (CAT)....................Average Cloud Cover Category
Pop 12HR (%)........................Probability for accumulating precipitation
Weather...
     See Day 1 through 3 Weather Descriptions


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