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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
308 PM EDT Fri Mar 20 2026
VAZ046-210800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
308 PM EDT Fri Mar 20 2026
Date 03/20/26 Sat 03/21/26 Sun 03/22/26 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
EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08
MIN/MAX TEMP 53 75 52 83 59
TEMP 70 64 60 58 55 53 67 73 75 66 59 56 53 53 68 80 83 74 70 66 64 59
DEWPT 40 41 44 45 47 49 52 49 47 48 47 48 48 50 55 55 54 51 52 53 54 52
MIN/MAX RH 86 37 90 36 78
RH 33 43 55 62 74 86 59 43 37 52 64 74 83 89 63 42 37 44 53 63 70 78
WIND DIR SW SW SW SW SW W N N E SE SE SE S SW SW SW SW SW SW SW W NW
WIND SPD 12 10 10 8 5 4 4 3 3 3 3 2 3 3 6 9 10 6 8 8 9 9
WIND GUST 24 23 21 19 16 17 18 19 19 20
CLOUDS B2 OV B1 SC B1 B1 SC SC SC SC SC SC SC B1 SC SC SC FW SC B1 B1 B2
CLOUDS(%) 77 93 63 45 60 53 43 49 36 40 31 44 48 52 40 43 28 20 38 56 67 77
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 50 5 5 0 10
RAIN SHWRS SC IS
MIX HGT 4 <1 <1 <1 <1 <1 3 5 6 <1 <1 <1 <1 <1 1 4 5 <1
T WIND DIR SW SW SW SW SW W N N N E E SE S S SW SW SW SW
T WIND SPD 28 11 9 9 6 4 9 4 1 8 10 5 4 4 12 18 18 9
DISPERSION FR FR PR PR VP VP VP VP PR PR PR PR
ADI 82 10 8 8 5 5 33 25 7 4 5 3 2 5 23 65 75 4
MAX LVORI 1 2 2 3 4 5 1 2 2 2 3 3 5 5 2 1 1 2
STABILITY D D D D E B B B B G G F F B B C C F
CEILING 5800 None None None None None None None None
STA PRES 29.17 29.13 29.19 29.17 29.21 29.20 29.17 29.06
Date 03/23Tue 03/24/26Wed 03/25/26Thu 03/26/26Fri 03/27/26
UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20
MAX/MIN TEMP 71 38 57 40 63 40 69 52 69
TEMP 69 60 46 40 56 51 44 43 61 55 45 42 64 65 59 56 68 60
DEWPT 43 31 26 22 20 23 26 30 34 32 33 31 36 40 44 45 43 38
RH 39 33 45 48 24 33 49 60 36 41 62 65 35 40 57 66 40 44
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 FW CL FW SC B1 B1 B1 B1 SC SC SC SC SC SC B1 B2 B1
POP 12HR 20 10 0 5 20 10 10 20 40
RAIN SHWRS IS IS IS SC SC
$$
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