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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 PM EST Sat Feb 21 2026
NCZ006-220900-
RAWS 310801
36.37N 79.29W Elev. 580 ft
731 PM EST Sat Feb 21 2026
Date 02/21/26 Sun 02/22/26 Mon 02/23/26 Tue
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 41 47 28 44 24
TEMP 51 50 48 43 44 46 45 37 33 32 30 28 36 43 43 36 31 30 27 25
DEWPT 44 45 45 42 41 38 29 23 19 18 18 17 18 18 16 15 15 14 13 13
MIN/MAX RH 100 50 62 33 62
RH 77 83 89 96 89 73 53 56 56 56 60 63 47 36 33 42 51 51 55 60
WIND DIR SE SE N N N NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW
WIND SPD 1 1 2 5 8 10 12 10 10 9 10 9 13 14 14 9 8 6 5 4
WIND GUST 24 21 21 20 21 20 26 27 27 19 18
CLOUDS OV OV OV OV OV OV OV B2 SC SC SC SC SC B1 B1 SC FW FW FW FW
CLOUDS(%) 92100100100 96 98 96 75 32 31 27 29 42 54 56 43 15 12 12 15
VSBY 10 10 8 6 9 9 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 80 60 10 5 0
RAIN C D L C C
MIX HGT <1 <1 <1 1 2 3 5 1 2 2 2 2 5 6 7 1
T WIND DIR SE SE NE N N NW NW NW NW NW NW NW NW NW NW NW
T WIND SPD 5 5 6 13 16 17 31 35 32 20 24 27 34 31 33 31
DISPERSION VP VP VP FR FR PR FR PR PR PR PR
ADI 3 3 6 20 31 42 92 40 22 14 16 78140102114 35
MAX LVORI 4 5 5 5 4 3 1 1 2 2 2 1 1 1 1 1
STABILITY F F D D D D D D E E E C C D D D
CEILING 6700 4800 400 2300 None None None None None
STA PRES 29.34 29.26 29.24 29.20 29.23 29.18 29.21 29.26
Date 02/24Wed 02/25/26Thu 02/26/26Fri 02/27/26Sat 02/28/26
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 47 36 59 49 61 42 58 35 62
TEMP 42 39 38 38 55 53 52 50 59 56 50 43 54 49 41 36 59 52
DEWPT 13 17 20 23 29 34 41 45 48 47 44 39 35 33 33 33 38 39
RH 30 40 48 54 37 48 66 83 67 72 80 86 48 54 73 89 45 61
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC B1 B2 B2 B2 B2 OV OV OV B2 B1 SC FW FW FW FW SC
POP 12HR 0 0 5 20 50 60 30 20 20
RAIN S C L C S S S
RAIN SHWRS SC NM
$$
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