228  
FOUS54 KMEG 080923  
PFWMEG  
 
FIRE WEATHER POINT FORECAST MATRICES  
NATIONAL WEATHER SERVICE MEMPHIS TN  
323 AM CST THU DEC 8 2022  
 
MSZ002-082200-  
WINBORN NFDRS SITE-MARSHALL MS  
34.69N 89.30W ELEV. 500 FT  
323 AM CST THU DEC 8 2022  
 
DATE THU 12/08/22 FRI 12/09/22 SAT 12/10/22  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
CST 3HRLY 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18  
 
MAX/MIN TEMP 69 59 67 49 65  
TEMP 64 67 69 68 65 63 63 62 62 64 65 66 60 54 51 49 51 56 63 64 60  
DEWPT 64 66 66 64 64 63 63 62 62 63 61 57 56 52 51 49 51 55 58 59 59  
MAX/MIN RH 87 100 73 100 84  
RH 100 97 90 87 97100100100100 97 87 73 87 93100100100 96 84 84 96  
WIND DIR SW SW W W W NW SE S SW W W NW N N NE E E S S SW SW  
WIND SPD 3 5 8 4 3 3 2 3 3 4 5 5 2 2 1 2 2 5 6 5 2  
CLOUDS OV OV B2 B2 B2 B2 OV OV OV OV B2 B1 B1 B1 B1 B2 B2 OV OV B2 OV  
CLOUDS(%) 92 93 85 81 80 87 90 94 96 97 78 66 57 59 65 74 83 90 90 87 88  
POP 12HR 50 80 40 5 60  
QPF 12HR 0.05 0.38 0.02 0 0.19  
RAIN SHWRS SC SC SC SC IS IS SC O SC SC SC SC NM NM SC  
TSTMS SC IS IS IS IS IS  
T WIND DIR S W SW SW W SW SW W SW W W NW NW N E NE E E E E E  
T WIND SPD 8 10 10 5 3 3 3 3 11 6 4 3 4 3 2 4 5 11 21 14 10  
MIXHGT M AGL 322 309 40 111 306 389 140 125 714 639  
MIXHGT FT AGL 1058 1013 131 364 1004 1275 458 410 2342 2097  
MIXHGT M MSL 444 431 162 233 428 511 262 247 836 761  
MIXHGT FT MSL 1458 1413 531 764 1404 1675 858 811 2742 2497  
TRANSWIND DIR SW SW SW SW W NW N NE E E  
TWIND SPD M/S 4 2 1 3 2 2 1 2 6 6  
TWIND SPD MPH 10 5 3 6 5 4 3 4 13 14  
VENT INDEX 1776 466 1022 524 5016  
CATEGORY DAY 1 1 1 1 3  
500M MIXHGT T 69 70 68 68 66 64 62 64 68 68  
500M TWND DIR SW SW SW SW W W N S SW SW  
500M TWND M/S 8 4 2 5 5 2 1 1 7 7  
500M TWND MPH 18 10 5 12 11 5 2 3 16 16  
DISPERSION 19 6 3 10 9 3 3 5 49 14  
LAL 3 1 1 2 2 1 1 1 2 2  
LASI 3 3 3 3 3 4 4 4 3 3  
STABILITY C C D D C C F E C C  
STAG INDEX 3 3 3 3 3  
 
DATE SUN 12/11/22 MON 12/12/22 TUE 12/13/22 WED 12/14/22  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
CST 6HRLY 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
 
MIN/MAX TEMP 46 59 39 60 47 64 50 60  
TEMP 55 47 56 52 44 40 57 52 47 51 62 61 57 51 58 54  
DEWPT 55 47 48 48 44 40 45 47 46 49 56 57 57 51 49 46  
RH 100 100 74 86100 100 64 83 96 93 81 87100 100 72 74  
WIND DIR NW N NE E SE SE S S  
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15  
AVG CLOUDS B2 B2 B1 SC FW SC SC SC B1 B2 OV OV OV B2 B1 B1  
POP 12HR 50 5 5 10 30 70 80 50  
RAIN SHWRS SC IS SC SC NM O NM SC SC  
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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