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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Thu Jul 23 2026
VAZ046-232000-
RAWS 441101
37.39N 78.80W Elev. 804 ft
801 AM EDT Thu Jul 23 2026
Date Thu 07/23/26 Fri 07/24/26 Sat 07/25/26
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 76 61 77 63 78
TEMP 70 74 75 71 66 63 62 63 72 77 77 73 68 65 63 65 70 75 77 73
DEWPT 59 60 61 63 61 60 59 61 63 64 64 65 64 64 63 65 66 66 66 66
MAX/MIN RH 60 95 64 100 69
RH 68 62 62 76 84 90 90 93 73 64 64 76 87 97100100 87 74 69 79
WIND DIR NE NE E E NE N NE NE NE E E E E E NE NE NE NE SE SW
WIND SPD 9 6 5 2 1 2 3 4 5 5 5 2 2 2 2 2 3 3 3 1
CLOUDS B1 B1 B1 SC SC FW SC SC B1 B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 SC
CLOUDS(%) 62 56 61 37 34 23 47 48 51 66 80 72 85 76 78 79 84 81 71 43
VSBY 10 10 10 10 10 8 7 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 5 0 50 30
RAIN SHWRS IS IS SC SC SC SC IS IS IS
MIX HGT 2 4 4 <1 <1 <1 <1 <1 3 5 4 <1 <1 <1 <1 <1 2 3 3 <1
T WIND DIR NE NE E S SW N N NE E E NE E E N N NE N N N E
T WIND SPD 16 9 6 5 2 2 3 5 18 12 11 9 8 6 4 10 9 8 4 1
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 45 33 26 3 1 1 2 6 61 51 44 4 4 3 2 11 20 28 15 1
MAX LVORI 1 1 2 3 5 6 7 6 3 1 1 4 6 8 9 7 4 3 3 4
STABILITY C C C G G G F A C C C F F F F B B B B F
CEILING 4000 None None None None 4300 4300 5100 6100 7700
STA PRES 29.43 29.41 29.44 29.41 29.42 29.40 29.40 29.37 29.38 29.31
Date Sun 07/26/26Mon 07/27/26Tue 07/28/26Wed 07/29/26
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 63 84 65 87 68 89 68 87
TEMP 65 66 81 76 67 68 85 80 71 71 86 81 70 71 85 80
DEWPT 65 66 69 70 67 68 70 71 69 70 74 72 70 70 70 70
RH 100100 67 82100100 61 74 93 97 68 74100 97 61 72
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B1 SC SC SC FW FW SC SC SC SC B1 B1 SC SC B1
POP 12HR 20 20 20 5 20 50 40 30
RAIN SHWRS IS IS IS IS IS SC SC SC
TSTMS IS IS IS 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