343  
FOUS54 KMEG 040835  
PFWMEG  
 
FIRE WEATHER POINT FORECAST MATRICES  
NATIONAL WEATHER SERVICE MEMPHIS TN  
335 AM CDT SUN JUN 4 2023  
 
MSZ002-042200-  
WINBORN NFDRS SITE-MARSHALL MS  
34.69N 89.30W ELEV. 500 FT  
335 AM CDT SUN JUN 4 2023  
 
DATE SUN 06/04/23 MON 06/05/23 TUE 06/06/23  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
CDT 3HRLY 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19  
 
MAX/MIN TEMP 92 65 91 66 91  
TEMP 65 66 84 91 91 86 75 69 66 67 82 90 89 83 73 68 66 68 84 90 88 83  
DEWPT 59 59 60 55 56 59 62 63 63 64 64 62 62 64 66 65 64 65 65 61 60 62  
MAX/MIN RH 29 93 39 93 38  
RH 81 78 44 30 31 40 64 81 90 90 55 39 41 53 79 90 93 90 53 38 39 49  
WIND DIR NE NE NE NE NE E NE E E E SE E NE E SE S NW NW NW NW NW NW  
WIND SPD 5 5 5 6 6 6 6 5 5 5 5 5 5 6 5 3 0 2 4 5 6 6  
CLOUDS FW FW FW FW SC SC SC FW FW FW FW SC B1 B1 SC SC SC FW FW SC SC SC  
CLOUDS(%) 7 12 14 23 45 40 32 24 18 9 20 38 57 52 31 36 41 21 15 39 48 38  
POP 12HR 20 20 30 20 30  
QPF 12HR 0.01 0.01 0.01 0.01 0.05  
RAIN SHWRS IS SC SC IS IS SC SC  
TSTMS IS SC SC IS IS SC SC  
T WIND DIR NE NE NE NE NE NE NE SE SE SE SW NE N SE S SW W N NW NW NW NW  
T WIND SPD 6 6 9 9 9 6 9 8 6 5 5 5 5 6 9 4 4 3 4 5 6 8  
MIXHGT M AGL 3030 2641 21 16 1957 2010 27 8 2217 2155  
MIXHGT FT AGL 9942 8665 69 53 6420 6596 89 27 7273 7069  
MIXHGT M MSL 3152 2763 143 138 2079 2132 149 130 2339 2277  
MIXHGT FT MSL 10342 9065 469 453 6820 6996 489 428 7673 7469  
TRANSWIND DIR NE NE E SE E NE S W NW NW  
TWIND SPD M/S 4 3 3 3 2 3 3 2 2 3  
TWIND SPD MPH 9 8 8 6 5 6 6 4 4 6  
VENT INDEX 12608 441 6396 456 4678  
CATEGORY DAY 4 1 3 1 3  
500M MIXHGT T 86 89 88 83 83 87 82 80 82 87  
500M TWND DIR NE NE E SE S E S W W W  
500M TWND M/S 4 3 4 7 3 2 6 6 3 1  
500M TWND MPH 10 6 10 17 6 5 14 14 6 3  
DISPERSION 29 6 7 8 18 5 5 4 18 5  
LAL 1 2 2 1 3 3 2 1 3 3  
LASI 6 6 5 4 4 4 4 3 5 5  
STABILITY B C F E B B F E A C  
STAG INDEX 3 3 3 3 3  
 
DATE WED 06/07/23THU 06/08/23FRI 06/09/23SAT 06/10/23  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
CDT 6HRLY 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19  
 
MIN/MAX TEMP 63 91 65 89 62 87 62 91  
TEMP 66 66 89 85 68 66 85 82 66 64 85 84 65 64 89 86  
DEWPT 62 62 56 59 62 63 59 59 56 55 52 55 56 57 54 58  
RH 87 87 33 41 81 90 41 46 70 73 32 37 73 78 30 39  
WIND DIR NW NW NW N NE NE E SW  
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15  
AVG CLOUDS SC FW FW FW SC SC FW SC FW FW FW FW FW FW FW SC  
POP 12HR 10 20 10 20 10 5 5 20  
RAIN SHWRS IS IS 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 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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