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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EST Sat Feb 21 2026
NCZ001-220900-
RAWS 310142
36.40N 81.46W Elev. 4608 ft
231 AM EST Sat Feb 21 2026
Date 02/20/26 Sat 02/21/26 Sun 02/22/26 Mon
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 39 50 25 30 17
TEMP 41 41 42 48 50 47 44 40 36 30 28 26 24 20 20 19 18 17
DEWPT 24 30 33 36 37 37 38 37 33 29 24 20 16 12 12 11 11 11
MIN/MAX RH 65 49 98 70 76
RH 50 65 70 63 61 68 79 89 89 96 85 78 71 71 71 70 73 77
WIND DIR W W W W W W W NW NW NW NW NW NW NW NW NW NW NW
WIND SPD 18 14 10 5 5 5 9 13 20 21 21 21 26 34 35 35 35 35
WIND GUST 35 39
CLOUDS B1 B2 B2 B2 OV OV OV B2 B2 B1 B2 B2 B2 B1 B1 B2 B2 B2
CLOUDS(%) 68 82 80 82100100100 86 72 68 72 77 70 65 68 74 70 75
VSBY 10 10 10 10 10 10 7 5 8 9 10 10 10 10 10 10 10 10
POP 12HR 40 30 50 30 30
RAIN C S S C L
SNOW C C C C C
SNOWSHWRS SC SC SC SC SC
MIX HGT <1 <1 <1 2 2 <1 <1 <1 <1 1 2 4 4 3 3 3 3 2
T WIND DIR NW NW NW W SW S S S NW NW NW NW NW NW NW NW NW NW
T WIND SPD 11 9 12 3 2 3 9 10 13 26 29 35 43 47 52 50 48 47
DISPERSION GD PR PR FR GD GD GD GD GD
ADI 10 10 14 6 5 3 8 9 12 42 64 96115 63 71 68 65102
MAX LVORI 2 2 3 3 3 3 4 5 5 4 4 3 3 3 1 3 3 3
STABILITY D D D D D D D D D D D D D D D D D D
CEILING 3300 2800 300 200 100 100 100 100
STA PRES 26.65 26.63 26.60 26.53 26.51 26.52 26.51 26.46
Date 02/23Tue 02/24/26Wed 02/25/26Thu 02/26/26Fri 02/27/26
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 21 14 32 25 45 39 47 34 45
TEMP 19 18 17 15 28 29 27 26 41 43 41 39 45 42 38 34 42 40
DEWPT 12 10 9 7 10 12 14 17 27 30 35 38 41 39 37 28 25 26
RH 74 70 70 70 46 48 57 68 57 60 79 96 86 89 96 78 50 57
WIND SPD 15> 15> 15> 15> 15> 15> 15> 15> <15
AVG CLOUDS B2 B1 B1 B1 SC SC B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 SC
POP 12HR 30 10 0 0 5 30 60 40 20
FLURRIES SC
RAIN SHWRS SC NM NM SC SC IS
SNOWSHWRS SC 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
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