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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 PM EDT Mon Apr 20 2026
NCZ005-202000-
RAWS 310540
36.38N 79.70W Elev. 858 ft
131 PM EDT Mon Apr 20 2026
Date Mon 04/20/26 Tue 04/21/26 Wed 04/22/26
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 66 36 69 50 81
TEMP 64 65 56 46 42 37 39 55 65 69 64 57 54 51 54 70 79 81 74
DEWPT 32 26 21 20 21 22 23 26 27 29 33 33 35 35 39 44 42 41 43
MAX/MIN RH 21 57 22 58 24
RH 30 23 25 35 43 54 52 32 24 22 31 40 48 54 57 39 27 24 33
WIND DIR NW NW N N NE NE NE SE SW SW S S SW SW SW SW W W W
WIND SPD 12 11 5 5 3 2 2 2 4 6 5 6 6 6 8 9 11 10 5
CLOUDS SC FW FW FW FW FW FW FW FW FW SC B1 SC FW SC FW FW SC SC
CLOUDS(%) 28 8 10 8 8 6 6 6 9 18 44 55 47 21 35 25 22 29 36
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 0 10
MIX HGT 9 8 <1 <1 <1 <1 <1 4 5 5 <1
T WIND DIR W NW N N N N NE W SW SW S
T WIND SPD 21 18 13 5 3 3 3 1 5 6 6
DISPERSION PR PR VP VP PR PR PR PR PR
ADI 113 93 6 3 2 2 4 5 34 46 3
MAX LVORI 1 1 2 2 2 3 2 2 1 1 2
STABILITY C C F F G G A A A A F
CEILING None None None None None None
STA PRES 29.44 29.56 29.61 29.63 29.49
Date Thu 04/23/26Fri 04/24/26Sat 04/25/26Sun 04/26/26
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 83 57 86 60 85 58 74
TEMP 58 58 80 76 64 60 84 78 65 63 83 76 64 60 73 70
DEWPT 47 48 49 48 48 50 46 47 49 52 52 54 55 54 53 51
RH 67 69 34 37 56 69 27 33 56 67 34 46 73 81 49 51
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC FW FW FW FW SC FW SC SC SC SC B1 B1 B1 B1 B1
POP 12HR 5 5 0 5 10 40 40 40
RAIN SHWRS IS SC SC SC SC 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