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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 AM EDT Sun Apr 19 2026
VAZ046-200800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
131 AM EDT Sun Apr 19 2026
Date 04/18/26 Sun 04/19/26 Mon 04/20/26 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
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 54 64 41 61 32
TEMP 71 66 57 55 61 63 56 49 45 42 45 56 59 60 54 44 37 33 37
DEWPT 54 54 43 38 32 25 24 22 25 26 28 27 21 18 17 19 20 20 20
MIN/MAX RH 64 24 55 19 58
RH 55 65 59 53 33 23 29 34 45 53 51 32 23 19 23 36 50 58 50
WIND DIR W W NW NW NW NW NW W SW W NW NW NW NW NW N NE NE NE
WIND SPD 6 10 14 10 10 11 5 4 4 5 5 10 11 11 6 5 3 3 2
WIND GUST 28 21 20 16 21
CLOUDS B1 B2 OV OV SC FW CL CL CL FW SC FW FW CL CL CL CL CL CL
CLOUDS(%) 58 74 90 92 44 15 2 4 4 6 29 13 16 4 3 3 4 4 4
VSBY 10 10 10 9 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 50 80 0 5 0
RAIN SHWRS IS SC SC
TSTMS IS
MIX HGT <1 <1 2 3 6 7 <1 <1 <1 <1 1 6 8 8 <1
T WIND DIR SW W NW NW NW NW NW W S SW W N W NW N
T WIND SPD 12 11 20 16 21 20 13 3 3 4 4 12 17 16 8
DISPERSION PR FR PR VP VP PR PR PR VP VP
ADI 8 10 34 50 97 98 6 2 2 2 6 85 88 82 4
MAX LVORI 2 2 1 1 1 1 2 2 2 3 2 1 1 1 2
STABILITY E D D C C C F G F F A B C C F
CEILING 3000 4300 None None None None None None
STA PRES 29.10 29.29 29.33 29.44 29.44 29.51 29.48
Date 04/21Wed 04/22/26Thu 04/23/26Fri 04/24/26Sat 04/25/26
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 65 47 79 51 82 54 86 59 83
TEMP 61 61 52 52 76 73 57 55 80 73 59 58 84 77 65 63 82 74
DEWPT 23 28 31 35 42 43 46 47 49 48 48 49 48 49 49 52 53 52
RH 23 28 44 52 30 34 67 74 34 41 67 72 29 37 56 67 37 46
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS CL FW FW SC B1 B1 FW FW FW FW FW FW FW FW SC SC SC B1
POP 12HR 0 0 20 5 5 0 5 10 40
RAIN SHWRS IS IS SC
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
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