Print This Forecast (Printer-Friendly)
EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
931 PM EDT Thu Sep 17 2026
VAZ024-180800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
931 PM EDT Thu Sep 17 2026
Date 09/17/26 Fri 09/18/26 Sat 09/19/26 Sun
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 91 65 79 64
TEMP 71 70 68 69 85 91 86 75 71 70 68 66 71 76 79 74 69 67 66 66
DEWPT 67 67 67 68 70 70 70 71 70 69 66 65 65 66 66 66 65 65 66 66
MIN/MAX RH 100 50 97 63 100
RH 87 90 97 97 61 50 59 87 97 97 93 97 81 71 64 76 87 93100100
WIND DIR W W NW W NE N NE NE E E E NE E E SE SE N N N N
WIND SPD 1 1 1 1 1 3 2 1 1 1 1 2 2 3 2 1 0 0 0 0
CLOUDS SC B1 OV OV SC B2 B2 B1 B2 B2 B1 B1 B2 B2 B2 B1 B2 B2 B1 B1
CLOUDS(%) 38 65 90 90 43 71 75 60 82 81 64 62 82 78 72 60 77 77 62 51
VSBY 10 1 0 0 10 6 6 7 3 7 6 7 7 10 10 10
POP 12HR 10 80 70 20 10
RAIN SHWRS NM NM SC NM SC SC IS IS
TSTMS SC SC IS
Obvis PF F+ F+
MIX HGT <1 <1 <1 <1 3 5 2 <1 <1 <1 <1 <1 2 2 2 <1
T WIND DIR NW NW NW NW NW NW NW NE NE NE NE NE E SE S SE
T WIND SPD 3 3 3 3 6 8 3 11 3 3 8 4 5 1 5 8
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 2 2 2 3 28 32 9 5 2 2 4 4 12 3 16 4
MAX LVORI 7 7 8 8 2 1 3 5 8 8 8 7 4 3 2 4
STABILITY G G G A A C C F F F F C C C C F
CEILING 8000 None 3400 3000 1700 3600 2600 2600
STA PRES 28.61 28.61 28.55 28.59 28.59 28.61 28.57
Date 09/20Mon 09/21/26Tue 09/22/26Wed 09/23/26Thu 09/24/26
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 66 85 63 73 56 64 54 67
TEMP 84 78 69 67 82 74 66 64 70 66 60 57 63 58 56 55 65 61
DEWPT 71 71 68 67 71 69 66 64 69 65 60 57 62 58 56 55 61 60
RH 65 79 97100 69 84100100 97 97100100 97100100100 87 97
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 B1 B1 SC B2 B2 B2 B1 B2 B2 B2 B1 B1 B1 B1 B1 B1
POP 12HR 50 20 70 60 60 60 40 30 20
RAIN SHWRS SC IS IS IS NM NM SC SC NM NM SC SC SC SC IS IS IS
TSTMS SC IS SC IS 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