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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1231 AM EST Fri Nov 21 2025
VAZ024-220900-
RAWS 441631
37.63N 79.51W Elev. 865 ft
1231 AM EST Fri Nov 21 2025
Date 11/20/25 Fri 11/21/25 Sat 11/22/25 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
EST 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 TEMP 44 64 53 65 36
TEMP 46 46 46 52 61 63 58 56 56 56 54 59 63 61 52 47 43 39 37
DEWPT 44 45 46 51 54 55 55 55 55 55 53 55 51 49 45 43 39 36 35
MIN/MAX RH 99 76 97 62 96
RH 93 96100 96 78 75 90 96 96 96 96 87 65 65 77 86 86 89 92
WIND DIR N N SE SW SW SW S S W W W N NW NW NW N NW W W
WIND SPD 0 0 1 1 4 3 2 4 2 2 2 2 3 3 2 1 1 1 1
CLOUDS OV OV OV OV OV OV OV B2 OV B1 B1 B2 B1 SC SC SC SC SC SC
CLOUDS(%) 100100100100 88 93 92 70 88 65 60 72 63 46 37 43 36 33 26
VSBY 10 9 9 8 8 9 9 5 4 10 10 8 8 8 8 8 8 8 8
POP 12HR 20 60 70 40 5
RAIN S L S C C C C S C C
MIX HGT <1 <1 <1 <1 1 <1 <1 <1 <1 <1 <1 2 3 2 <1
T WIND DIR SE NE SE W W S S S SW W SW N NE NE NE
T WIND SPD 1 1 1 2 2 4 4 3 6 5 2 1 6 6 2
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 1 1 1 2 4 4 2 2 3 3 2 3 17 21 1
MAX LVORI 9 10 10 9 4 4 6 8 8 8 8 5 3 2 4
STABILITY F F C C C C F F F F C C D B F
CEILING 3700 300 1700 200 1400 1400 None None
STA PRES 28.55 28.53 28.44 28.37 28.33 28.38 28.47
Date 11/23Mon 11/24/25Tue 11/25/25Wed 11/26/25Thu 11/27/25
UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EST 6hrly 13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19
MAX/MIN TEMP 61 37 63 42 57 48 66 39 51
TEMP 58 50 42 37 61 51 45 43 55 52 52 51 64 57 46 39 49 41
DEWPT 34 36 35 33 34 36 36 37 42 46 50 49 53 47 42 32 23 22
RH 40 58 76 85 36 56 70 79 61 80 93 93 67 69 86 76 36 46
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW CL FW FW FW SC B1 B2 B2 B2 B2 B2 B1 B1 B1 SC FW SC
POP 12HR 0 0 5 10 40 50 20 20 10
RAIN C C C C
RAIN SHWRS IS IS IS
$$
This product is for planning and review purposes only and is not
to be substituted for an official fire weather spot forecast. The
data displayed are calculated from a 2.5 by 2.5 km digital
database and only approximates weather conditions in highly
varying terrain. Please relay any comments you have to the NWS via
email at rnk.webmaster@noaa.gov.
Below is a weather element key for this product.
(Note...winds do not reflect local terrain effects.)
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 humdity
RH(%)...............................Relative humidity
WIND DIR(8 POINT COMPASS)...........Wind direction
WIND SPD(MPH).......................Wind speed
CLOUDS(CATEGORY)....................Cloud cover category
EXAMPLE: CL = CLEAR; FW = FEW; SC = Scattered; BK = Broken; OV = Overcast
CLOUDS(%)...........................Cloud cover as a percentage
VSBY................................Visibility value in statute miles
POP 12HR(%).........................Probability for accumulating precipitation
WEATHER...
TYPE...
RAIN...........Rain
RAIN SHWRS.....Rain showers
TSTMS..........Thunderstorms
DRIZZLE........Drizzle
SNOW...........Snow
SNOWSHWRS......Snow showers
SLEET..........Sleet
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
MIX HGT(THOUSANDS OF FT AGL)........Mixing height
Example: 6 = 6000 feet; 12 = 12000 feet; <1 = Less than 1000 foot
t WIND DIR(8 POINT COMPASS).........Transport Wind direction
T WIND SPD(MPH).....................Transport Wind speed
DISPERSION(CATEGORY)................Smoke Dispersion category
Values: vp =Very Poor;PR = Poor; FR = Fair; GD = Good;
ADI (INDEX).........................Atmospheric Dispersion Index
MAX LVORI (INDEX)...................Low Visibility Occurrence Risk Index
STABILITY (CATEGORY)................Pasquill Turner Stability
CEILING (FT)........................Ceiling
STA PRES (INCHES MERCURY)...........Station pressure
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 SPD(MPH).......................Wind Speed
Example: <15 = less than 15 MPH; 15> = 15 MPH or greater
AVE CLOUDS(CATEGORY)................Average Cloud Cover Category
POP 12HR(%).........................Probability for accumulating precipitation
WEATHER.............................See Day 1 through 3 weather descriptions