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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
901 PM EDT Tue Jul 28 2026
VAZ046-290800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
901 PM EDT Tue Jul 28 2026
Date 07/28/26 Wed 07/29/26 Thu 07/30/26 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 67 86 63 86 64
TEMP 73 71 68 69 79 85 85 78 71 67 64 67 78 84 85 80 71 67 64 68
DEWPT 70 67 65 67 66 65 64 63 62 61 60 62 62 63 63 63 63 61 60 63
MIN/MAX RH 92 48 88 46 88
RH 90 87 90 93 64 51 50 60 73 81 87 84 58 49 48 56 76 81 87 84
WIND DIR W NW W NW NW NW NW NW NW NW W W NW NW N NE N NW NW N
WIND SPD 5 3 5 5 6 6 9 8 5 4 4 4 5 5 5 2 3 2 3 2
CLOUDS FW CL CL CL CL SC SC SC CL CL CL CL CL FW FW SC SC FW FW FW
CLOUDS(%) 16 3 5 4 2 28 37 29 2 1 4 3 3 20 23 29 39 16 9 15
VSBY 10 10 8 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 10 0 0 0 0
MIX HGT <1 <1 <1 <1 4 6 6 <1 <1 <1 <1 <1 5 7 7 <1
T WIND DIR W W NW NW N NW NW NW NW NW W NW N NW NW NW
T WIND SPD 8 8 6 9 11 10 14 12 5 4 3 9 5 8 10 2
DISPERSION PR VP PR PR PR VP VP VP VP VP VP
ADI 4 4 3 9 56 69104 8 3 2 2 9 34 66 89 1
MAX LVORI 8 8 8 6 1 1 1 2 3 5 6 4 1 1 1 3
STABILITY F F F A B B B E F F F A A A A G
CEILING None None None None None None None None
STA PRES 28.97 29.04 29.05 29.13 29.17 29.20 29.17
Date 07/31Sat 08/01/26Sun 08/02/26Mon 08/03/26Tue 08/04/26
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 87 67 86 69 83 70 82 69 85
TEMP 85 82 70 70 85 79 71 71 82 77 71 71 80 76 70 71 83 78
DEWPT 64 65 66 67 67 68 69 70 72 72 71 71 74 74 70 71 74 73
RH 50 56 87 90 55 69 93 97 72 85100100 82 94100100 74 85
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW SC B1 B2 B1 B2 OV B2 B2 B2 B2 B1 B1 B1 SC B1
POP 12HR 5 0 10 20 50 50 50 40 40
RAIN SHWRS IS IS SC SC SC IS SC SC SC IS IS SC
TSTMS IS SC IS SC IS 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