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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
432 PM EDT Fri Apr 17 2026
VAZ024-180800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
432 PM EDT Fri Apr 17 2026
Date 04/17/26 Sat 04/18/26 Sun 04/19/26 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 57 90 54 64 41
TEMP 84 75 67 62 58 60 78 87 89 78 73 65 62 57 56 60 59 54 49 44 42 44
DEWPT 46 47 47 48 49 51 54 54 53 54 56 56 53 46 37 31 28 25 23 27 29 29
MIN/MAX RH 75 29 76 30 61
RH 27 37 49 60 72 72 43 32 29 43 55 73 72 67 49 33 30 32 36 51 60 55
WIND DIR NW NW NW N N N S SW S SW SW W NW NW NW NW NW NW NW W W NW
WIND SPD 8 2 1 1 1 0 2 6 6 3 3 2 5 9 10 10 9 5 3 2 2 3
WIND GUST 17 13 17 25 25 23 23 19
CLOUDS FW FW FW SC SC SC FW SC B1 B2 B2 B2 B2 OV B2 B1 SC CL CL CL FW FW
CLOUDS(%) 12 15 9 41 28 30 19 39 59 71 78 77 79 89 80 58 28 3 3 5 11 25
VSBY 10 10 8 7 7 10 10 10 7 9 8 10 10 10 8 8 9 9 10 8 9
POP 12HR 0 5 70 50 5
RAIN SHWRS NM NM NM NM SC SC IS IS
MIX HGT 9 <1 <1 <1 <1 <1 4 6 8 <1 <1 <1 2 3 4 7 8 2
T WIND DIR NW NW NW N N N S SW SW S SW W NW NW NW NW NW NW
T WIND SPD 12 2 3 3 3 1 14 17 19 10 8 11 17 25 26 26 26 12
DISPERSION VP VP VP VP VP VP VP PR PR VP VP VP
ADI 111 1 2 2 2 1 71122 98 5 4 5 12 80102192200 6
MAX LVORI 1 2 2 3 3 3 1 1 1 2 3 3 4 1 1 1 1 2
STABILITY B G G F G A A B C F F F E C C B B F
CEILING None None None 8800 5700 2900 6400 None None
STA PRES 28.48 28.48 28.46 28.36 28.33 28.35 28.52 28.54
Date 04/20Tue 04/21/26Wed 04/22/26Thu 04/23/26Fri 04/24/26
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 63 34 72 47 82 52 83 54 87
TEMP 61 55 39 37 66 64 52 51 79 73 58 54 80 74 60 57 83 76
DEWPT 23 20 23 23 28 33 36 40 45 45 46 48 49 49 49 48 50 50
RH 23 25 52 56 24 31 54 66 30 37 64 80 34 41 67 72 32 40
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW CL CL CL FW FW FW SC SC FW FW FW SC FW FW FW SC
POP 12HR 0 0 0 0 20 5 10 5 20
RAIN SHWRS IS IS
TSTMS 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