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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Wed Jul 22 2026
VAZ046-230800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
801 PM EDT Wed Jul 22 2026
Date 07/22/26 Thu 07/23/26 Fri 07/24/26 Sat
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 63 76 60 79 62
TEMP 70 67 65 65 71 74 73 71 65 62 61 63 72 77 78 73 67 64 62 65
DEWPT 70 67 63 59 58 59 60 63 62 61 59 61 63 63 64 64 64 63 62 64
MIN/MAX RH 100 59 96 62 99
RH 100100 93 81 63 59 64 76 90 97 93 93 73 62 62 73 90 97100 97
WIND DIR SW NE NE NE NE NE NE E NE NE N NE NE E E NE E E N NE
WIND SPD 3 5 10 9 9 8 5 3 2 2 3 4 6 6 5 2 2 1 2 2
WIND GUST 20 19
CLOUDS B2 B2 B2 B2 B2 B2 B2 SC FW FW B1 SC B2 B2 B2 B2 B2 B2 B2 B2
CLOUDS(%) 72 77 79 72 77 72 70 31 13 17 57 32 72 79 83 79 82 74 78 78
VSBY 6 7 7 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 60 10 5 10 20
RAIN SHWRS SC SC SC IS IS IS IS IS
TSTMS
MIX HGT <1 <1 <1 1 3 3 4 <1 <1 <1 <1 <1 3 3 4 <1
T WIND DIR SW NW NE NE NE NE NE NE N N N NE E E E E
T WIND SPD 10 5 20 23 19 11 5 3 2 2 3 4 10 5 4 8
DISPERSION VP PR FR VP VP VP VP VP VP VP VP
ADI 5 4 19 38 56 38 21 2 1 1 2 5 34 20 17 4
MAX LVORI 9 9 5 3 1 1 2 4 7 7 8 6 3 2 2 3
STABILITY F E D C C C C G G G F A C C C F
CEILING 10300 2000 2700 4300 None None 5900 3500 3500
STA PRES 29.24 29.31 29.41 29.40 29.43 29.43 29.46 29.39
Date 07/25Sun 07/26/26Mon 07/27/26Tue 07/28/26Wed 07/29/26
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 79 63 84 66 87 67 90 67 87
TEMP 76 72 65 66 81 77 67 69 85 80 70 70 87 81 70 70 84 79
DEWPT 65 66 64 66 69 71 67 69 70 71 68 69 72 71 68 68 69 69
RH 69 81 97100 67 82100100 61 74 93 97 61 72 93 93 61 72
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B1 B1 B1 SC SC SC SC SC SC B1 SC SC B1 SC SC SC SC
POP 12HR 20 30 20 20 20 30 40 30 30
RAIN SHWRS IS IS SC SC IS IS IS SC IS SC SC SC
TSTMS IS IS IS SC 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