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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
932 PM EDT Sun Apr 19 2026
VAZ018-200800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
932 PM EDT Sun Apr 19 2026
Date 04/19/26 Mon 04/20/26 Tue 04/21/26 Wed
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 37 56 29 71 52
TEMP 45 43 40 39 45 53 53 46 40 34 31 34 55 66 70 63 55 53 53 56
DEWPT 21 24 29 27 22 19 18 16 18 18 18 20 24 27 33 34 36 38 39 40
MIN/MAX RH 66 24 60 22 59
RH 38 47 64 62 40 26 25 29 41 51 58 56 30 23 25 34 49 57 59 55
WIND DIR W W NW NW NW NW NW NW NW NW W W SW SW W SW SW W W W
WIND SPD 8 8 10 10 9 12 11 5 2 1 1 1 2 4 4 3 4 5 6 6
WIND GUST 20 12 16 14 18 19 23 27
CLOUDS CL FW SC SC FW FW FW FW CL CL CL CL CL FW FW FW SC FW FW SC
CLOUDS(%) 3 15 31 33 16 9 9 6 5 4 5 3 5 11 13 24 27 22 25 44
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 9 9 9 9 10 10 9
POP 12HR 0 5 0 0 10
RAIN SHWRS IS
MIX HGT <1 <1 <1 3 5 7 6 2 <1 <1 <1 <1 4 5 6 <1
T WIND DIR W W W NW NW NW NW NW NW NW W S W W SW S
T WIND SPD 5 8 5 16 20 20 20 18 5 2 2 4 5 9 9 5
DISPERSION PR PR FR PR VP VP VP VP VP PR PR
ADI 4 5 4 57120 97 95 8 3 1 1 5 26 54 64 3
MAX LVORI 2 2 3 1 1 1 1 2 2 2 2 2 2 1 1 2
STABILITY E E E B B C C F G G G A A A A G
CEILING None None None None None None None None
STA PRES 27.87 27.95 27.96 28.01 28.04 28.04 27.91
Date 04/22Thu 04/23/26Fri 04/24/26Sat 04/25/26Sun 04/26/26
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 74 52 81 55 83 59 78 56 71
TEMP 73 67 56 55 79 71 58 58 81 73 62 61 76 68 59 57 70 65
DEWPT 45 45 46 48 48 45 44 46 46 47 47 52 55 52 51 51 52 48
RH 37 45 69 77 34 39 59 64 29 40 58 72 48 57 75 80 53 54
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC FW CL FW FW FW FW B1 SC B1 B1 B2 B1 B1 B1 B1
POP 12HR 30 10 10 5 10 30 60 40 50
RAIN SHWRS IS SC SC SC NM SC SC SC SC
TSTMS 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