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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Fri Jul 17 2026
VAZ046-172000-
RAWS 441101
37.39N 78.80W Elev. 804 ft
801 AM EDT Fri Jul 17 2026
Date Fri 07/17/26 Sat 07/18/26 Sun 07/19/26
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 94 73 96 73 91
TEMP 85 92 94 88 78 75 73 76 89 95 91 84 77 75 73 76 86 90 87 80
DEWPT 67 65 66 70 70 71 70 72 73 69 71 72 73 72 71 72 73 72 71 72
MAX/MIN RH 41 92 43 93 55
RH 55 41 40 55 76 87 90 87 59 43 52 67 87 90 93 87 65 56 59 77
WIND DIR NE E SE SE SE SE E S SW SW SW SW SW SW SW W W NW NE E
WIND SPD 5 3 3 2 3 2 1 2 6 11 10 8 6 6 6 5 5 5 5 3
CLOUDS B1 SC SC SC B1 B2 B2 B1 SC B1 B2 SC SC B1 B1 SC SC B2 B2 B1
CLOUDS(%) 51 48 40 41 55 74 77 60 49 55 83 50 50 54 53 46 44 77 77 54
VSBY 5 5 5 5 5 5 5 5 10 7 6 7 7 10 10 7 7 6 6 7
POP 12HR 0 20 60 30 60
RAIN SHWRS IS SC NM SC SC IS IS NM NM SC
TSTMS SC NM SC IS SC SC SC
Obvis K K K K K K K K
MIX HGT 3 5 6 <1 <1 <1 <1 <1 3 7 6 <1 <1 <1 <1 <1 4 5 3 <1
T WIND DIR NE NE S SE N NE N SE SW SW SW SW SW W W W W W W NW
T WIND SPD 6 1 2 5 2 3 0 1 13 16 18 12 6 8 11 9 4 9 10 3
DISPERSION VP VP VP VP PR PR PR PR VP
ADI 21 8 18 3 1 2 0 1 55 56 82 11 5 5 8 11 22 38 34 2
MAX LVORI 2 2 2 3 4 5 7 6 1 1 1 3 5 6 6 5 3 1 1 4
STABILITY C A A F F F F A B D C D E E E A A C C F
CEILING None None 4700 4300 None 4700 None None None 4700
STA PRES 29.37 29.29 29.30 29.28 29.24 29.13 29.13 29.11 29.15 29.12
Date Mon 07/20/26Tue 07/21/26Wed 07/22/26Thu 07/23/26
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 67 88 69 92 73 91 65 86
TEMP 70 70 86 82 71 72 90 86 75 75 88 83 69 68 84 80
DEWPT 70 67 70 70 70 71 73 72 71 71 69 65 62 61 61 61
RH 100 90 59 67 97 97 58 63 87 87 54 55 78 78 46 52
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 SC SC B1 SC SC SC B1 B1 B1 SC SC SC SC SC SC
POP 12HR 30 30 20 20 30 20 20 10
RAIN SHWRS SC SC IS IS SC IS IS IS
TSTMS SC SC IS 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