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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Tue Apr 21 2026
VAZ018-212000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
801 AM EDT Tue Apr 21 2026
Date Tue 04/21/26 Wed 04/22/26 Thu 04/23/26
UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20
MAX/MIN TEMP 72 52 76 53 80
TEMP 53 66 71 63 55 54 53 57 69 73 75 67 59 55 53 55 73 79 78 69
DEWPT 22 23 30 35 37 39 39 41 43 46 44 44 44 44 44 47 50 48 47 46
MAX/MIN RH 19 61 34 76 32
RH 29 19 22 35 51 57 59 55 39 38 33 43 57 66 71 74 44 34 33 44
WIND DIR S SW W SW W W W W W W W NW W W W W NW NW W W
WIND SPD 2 4 4 3 4 4 5 6 11 11 10 5 3 2 2 2 4 4 4 2
WIND GUST 12 16 14 17 18 21 27 32 31 27 20 14 13 13 13 17 14
CLOUDS CL FW FW FW SC SC B1 B2 B1 B1 B1 SC FW FW FW FW FW SC SC SC
CLOUDS(%) 2 9 6 17 43 35 53 71 61 55 51 26 20 8 15 20 20 35 35 26
VSBY 10 10 10 10 10 10 10 7 7 7 7 10 10 10 10 10 10 7 7 10
POP 12HR 0 5 30 5 20
RAIN SHWRS SC SC SC SC IS IS
MIX HGT 3 4 6 <1 <1 <1 <1 1 4 4 4 <1 <1 <1 <1 <1 4 7 6 <1
T WIND DIR S SW SW S SW SW W W W W W W W W W NW NW NW W NW
T WIND SPD 6 9 13 6 6 4 5 10 35 28 34 10 6 5 5 6 14 9 10 13
DISPERSION VP VP VP PR PR VP VP VP VP
ADI 26 51 98 3 5 2 4 14102 83128 5 3 3 3 7 80 80 75 6
MAX LVORI 2 1 1 2 2 3 3 2 1 1 1 2 3 3 3 3 1 1 1 2
STABILITY A A A G E F E B D D C F G G G A A A A G
CEILING None None None 17900 10100 None None None None None
STA PRES 28.06 27.93 27.90 27.84 27.83 27.82 27.81 27.80 27.82 27.75
Date Fri 04/24/26Sat 04/25/26Sun 04/26/26Mon 04/27/26
UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20
MIN/MAX TEMP 54 82 58 77 54 70 50 71
TEMP 58 57 81 71 60 59 73 68 58 55 67 62 53 51 68 63
DEWPT 46 47 46 47 48 50 56 53 50 49 49 44 44 45 47 46
RH 64 69 29 42 64 72 55 59 75 80 52 52 71 80 47 54
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC FW SC SC SC SC B1 B2 B2 B1 B1 B1 SC SC B1 B1
POP 12HR 5 10 20 80 60 40 20 40
RAIN SHWRS IS IS SC O NM SC SC SC IS IS SC SC
TSTMS 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