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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
802 AM EDT Sun Apr 19 2026
VAZ046-192000-
RAWS 441101
37.39N 78.80W Elev. 804 ft
802 AM EDT Sun Apr 19 2026
Date Sun 04/19/26 Mon 04/20/26 Tue 04/21/26
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 65 41 61 32 66
TEMP 53 61 62 55 48 46 43 45 54 58 59 51 43 37 33 37 53 62 65 61
DEWPT 43 34 26 23 22 23 25 29 27 23 21 20 20 22 22 22 23 25 28 30
MAX/MIN RH 25 54 22 63 23
RH 69 36 25 29 35 40 49 53 35 26 23 29 39 54 63 54 31 24 25 31
WIND DIR NW NW NW NW W SW W NW NW NW NW NW N NE N NE S SW S S
WIND SPD 10 10 11 5 4 4 5 5 10 11 11 5 4 3 2 2 3 5 6 5
WIND GUST 21 20 16 21 16 16
CLOUDS OV SC FW CL CL CL FW SC FW FW FW CL CL CL CL CL CL CL CL FW
CLOUDS(%) 92 44 15 2 4 4 6 29 13 11 8 3 4 4 5 4 3 4 3 7
VSBY 9 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 80 0 5 0 0
RAIN SHWRS SC
TSTMS
MIX HGT 2 6 7 <1 <1 <1 <1 1 6 9 9 <1 <1 <1 <1 1 4 5 5 <1
T WIND DIR NW NW NW NW W S SW W NW NW NW NW N N N E W SW SW S
T WIND SPD 16 21 23 10 3 4 5 6 17 18 19 17 4 3 2 8 3 10 16 6
DISPERSION PR VP VP PR PR VP VP VP PR
ADI 39145111 5 2 2 3 10120 95101 8 2 2 1 13 17 63 92 3
MAX LVORI 3 1 1 2 2 2 2 2 1 1 1 2 2 2 3 2 2 1 1 2
STABILITY C B C F F F F A B C C F F G G A A A B F
CEILING 3900 None None None None None None None None None
STA PRES 29.34 29.35 29.43 29.42 29.49 29.49 29.58 29.62 29.61 29.44
Date Wed 04/22/26Thu 04/23/26Fri 04/24/26Sat 04/25/26
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 48 79 51 83 54 86 58 82
TEMP 52 53 76 72 58 56 80 74 60 59 84 78 64 61 81 73
DEWPT 32 38 46 44 48 48 48 47 48 49 48 48 49 51 53 54
RH 46 57 34 37 69 74 33 38 64 69 29 35 58 70 38 51
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC SC SC SC FW CL FW FW FW FW SC SC SC SC B1
POP 12HR 5 20 10 5 0 10 20 50
RAIN SHWRS IS 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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