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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Sun Aug 23 2026
VAZ024-240800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
801 PM EDT Sun Aug 23 2026
Date 08/23/26 Mon 08/24/26 Tue 08/25/26 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 56 85 54 87 59
TEMP 64 60 58 60 76 81 81 71 62 58 54 56 74 81 85 76 66 61 60 62
DEWPT 51 51 51 54 57 53 51 51 51 51 50 52 55 53 53 56 56 55 54 56
MIN/MAX RH 81 33 88 33 84
RH 63 72 77 81 52 38 35 49 67 77 86 86 51 38 33 50 70 81 81 81
WIND DIR W N NW NW W W NW NW NW NW N NW NW W SW SE N N N N
WIND SPD 1 0 1 1 4 5 5 3 2 1 0 1 1 2 1 1 0 0 0 0
CLOUDS FW SC CL CL FW FW FW FW CL FW FW FW FW FW FW FW FW FW FW SC
CLOUDS(%) 7 33 1 1 6 6 8 17 4 17 10 22 18 8 8 11 12 12 11 26
VSBY 10 10 7 3 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 0 0
MIX HGT <1 <1 <1 <1 4 6 5 <1 <1 <1 <1 <1 3 5 5 <1
T WIND DIR W W NW NW W W W NW NW NW NW NW N NW SW S
T WIND SPD 3 2 3 3 18 16 11 3 4 4 3 2 4 2 3 2
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 2 1 2 3104124 74 2 2 2 2 2 20 15 22 1
MAX LVORI 3 3 5 4 1 1 1 2 3 4 6 6 2 2 2 2
STABILITY G G G A A A A G G G G A A A A G
CEILING None None None None None None None None None
STA PRES 28.50 28.50 28.53 28.51 28.58 28.59 28.60 28.55
Date 08/26Thu 08/27/26Fri 08/28/26Sat 08/29/26Sun 08/30/26
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 90 65 89 64 90 64 88 65 89
TEMP 87 78 67 67 83 77 68 67 87 79 66 67 85 77 67 67 84 79
DEWPT 64 64 65 66 69 69 67 67 67 67 65 65 67 67 66 66 68 68
RH 46 62 93 97 63 76 97100 52 67 97 93 55 71 97 97 59 69
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC B1 SC B1 B2 B1 SC SC SC SC SC FW SC SC SC SC B1
POP 12HR 5 30 60 30 10 10 20 20 20
RAIN SHWRS SC IS SC NM SC IS IS IS
TSTMS IS SC IS IS 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