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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 AM EDT Wed Jul 22 2026
VAZ046-230800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
131 AM EDT Wed Jul 22 2026
Date 07/21/26 Wed 07/22/26 Thu 07/23/26 Fri
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 73 85 63 76 61
TEMP 74 73 74 81 84 83 77 73 70 65 64 70 74 76 72 66 63 61 64
DEWPT 72 71 72 73 73 74 73 71 68 63 60 60 61 62 63 62 60 58 60
MIN/MAX RH 99 69 97 62 92
RH 93 93 93 77 70 74 87 93 93 93 87 71 64 62 73 87 90 90 87
WIND DIR SW SW SW SW SW SW SW SW N NE NE NE NE E E NE NE NE NE
WIND SPD 11 10 10 10 9 8 4 3 6 10 9 9 8 6 3 2 3 4 5
WIND GUST 24 21 20 19
CLOUDS B2 SC B1 B1 B1 B2 B1 B1 B1 B1 B1 B2 B2 B1 SC SC SC B1 B1
CLOUDS(%) 85 50 62 59 65 76 66 66 62 68 56 78 74 61 49 41 33 59 56
VSBY 7 7 8 9 10 10 10 7 6 10 10 10 7 7 10 10 7 7
POP 12HR 90 60 70 5 10
RAIN SHWRS O IS SC SC SC NM SC SC SC IS
TSTMS SC IS SC SC SC IS
MIX HGT <1 <1 <1 3 4 3 <1 <1 <1 <1 1 2 3 4 <1 <1 <1 <1 <1
T WIND DIR SW SW SW W W W S S NE NE NE NE NE NE NE N N NE NE
T WIND SPD 21 20 20 18 13 8 4 1 12 20 20 18 8 3 2 1 2 3 4
DISPERSION FR FR VP VP PR FR VP VP VP VP
ADI 20 19 16 57 52 31 3 1 8 19 34 52 27 15 1 1 1 2 5
MAX LVORI 5 5 5 3 3 3 6 8 6 4 4 3 2 2 3 6 7 6 5
STABILITY D D C C C B E F E D C C C B F F G E B
CEILING 1200 5800 5600 2700 2100 3400 17800 None None
STA PRES 29.08 29.15 29.17 29.21 29.29 29.39 29.37 29.42 29.44
Date 07/24Sat 07/25/26Sun 07/26/26Mon 07/27/26Tue 07/28/26
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 79 64 87 67 90 68 90
TEMP 78 72 65 66 77 75 66 68 85 81 69 71 89 81 71 71 88 80
DEWPT 63 64 64 65 67 67 66 67 71 71 68 69 71 71 68 69 72 71
RH 60 76 97 97 71 76100 97 63 72 97 93 56 72 90 93 59 74
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B2 B2 B2 B2 B1 SC SC SC SC SC SC SC SC B1 SC SC B1
POP 12HR 20 30 30 20 20 10 20 40 40
RAIN SHWRS IS IS SC SC SC SC IS IS IS IS SC IS SC
TSTMS IS IS 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