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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Fri Jul 31 2026
VAZ046-010800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
801 PM EDT Fri Jul 31 2026
Date 07/31/26 Sat 08/01/26 Sun 08/02/26 Mon
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 64 88 70 85 69
TEMP 72 68 66 68 82 87 86 81 77 74 71 72 79 82 80 76 73 73 72 72
DEWPT 58 60 60 63 65 65 66 66 67 67 67 68 72 73 74 74 73 73 72 72
MIN/MAX RH 86 48 92 74 100
RH 61 76 81 84 56 48 51 60 71 79 87 87 79 74 82 94100100100100
WIND DIR S S S SW S S S S S S S SE S S S S S S S S
WIND SPD 2 2 2 2 6 10 10 10 10 8 5 5 8 9 8 5 4 5 5 5
WIND GUST 21 21 20 19
CLOUDS B1 SC SC SC SC B2 B2 B2 B2 B1 B1 B2 B2 B2 B2 OV OV B2 B2 B2
CLOUDS(%) 51 45 39 43 44 81 81 79 81 59 67 86 73 81 81 88 88 83 85 81
VSBY 10 10 10 10 10 10 10 10 10 10 10 9 9 3 3 3 3 6 6 6
POP 12HR 0 0 20 70 80
RAIN SHWRS SC SC NM NM O O SC SC NM
TSTMS SC SC SC SC SC SC
MIX HGT <1 <1 <1 <1 3 6 6 <1 <1 <1 <1 <1 3 3 3 <1
T WIND DIR SE S S S S S S S S S S S S S SW S
T WIND SPD 2 2 2 3 16 16 17 13 9 10 11 12 13 11 11 9
DISPERSION VP VP VP FR FR PR PR PR VP PR PR
ADI 1 1 1 3 59 73 75 12 8 9 8 14 43 40 36 6
MAX LVORI 3 4 5 5 1 1 1 2 3 4 4 5 3 3 3 6
STABILITY F F F A B C C D D D E C C C C E
CEILING None None 22300 4200 4200 9000 1000 2200 13700
STA PRES 29.26 29.25 29.25 29.20 29.20 29.19 29.20 29.18
Date 08/03Tue 08/04/26Wed 08/05/26Thu 08/06/26Fri 08/07/26
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 83 68 85 68 86 69 89 70 89
TEMP 81 76 71 70 83 79 70 70 84 79 72 71 86 81 72 72 88 81
DEWPT 77 74 71 70 75 73 70 70 75 74 72 71 74 74 72 72 75 74
RH 88 94100100 77 82100100 74 85100100 68 79100100 66 79
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B1 SC B1 B1 SC SC B1 B1 SC B1 B1 B1 SC SC SC B1
POP 12HR 70 40 50 20 30 20 30 20 30
RAIN SHWRS NM NM SC IS SC IS SC IS SC IS SC
TSTMS SC IS SC IS SC IS SC 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