Print This Forecast (Printer-Friendly)
EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 AM EDT Fri Sep 18 2026
VAZ018-190800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
131 AM EDT Fri Sep 18 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 70 87 66 77 65
TEMP 71 71 72 80 85 86 78 73 71 69 67 70 74 76 70 66 67 66 66
DEWPT 67 66 66 70 69 68 68 67 65 66 66 68 68 68 65 63 64 64 64
MIN/MAX RH 91 56 100 75 95
RH 87 84 81 72 59 55 71 81 81 90 97 93 82 76 84 90 90 93 93
WIND DIR NW NW NW NW NW NW N NE E E E E SE SE SE SE SE SE S
WIND SPD 5 4 6 5 5 5 3 2 3 2 3 3 3 3 3 2 2 1 1
CLOUDS FW FW SC B1 B1 B1 SC B1 B2 B2 OV B2 B2 B1 B1 B2 B2 B1 B1
CLOUDS(%) 23 25 33 52 54 52 45 56 77 73 88 83 76 64 66 72 70 60 66
VSBY 9 8 7 8 8 8 8 6 4 6 6 6 6 6 10 10 10 10 10
POP 12HR 5 50 20 50 10
RAIN SHWRS IS SC IS IS IS IS SC SC
TSTMS IS IS
MIX HGT <1 <1 <1 3 5 3 <1 <1 <1 <1 <1 1 2 2 <1
T WIND DIR W NW NW NW NW NW NE NE NE E E SE S S SE
T WIND SPD 4 6 5 9 13 13 9 4 2 3 6 6 4 5 5
DISPERSION PR VP VP VP VP VP VP VP VP VP
ADI 2 3 6 36 41 31 4 2 1 2 7 13 10 14 3
MAX LVORI 6 6 5 3 1 1 5 6 7 7 6 5 4 3 5
STABILITY G G B B D D F F F F C C C C F
CEILING None None None 1000 100 1000 1600 1600
STA PRES 27.92 27.92 27.85 27.88 27.88 27.90 27.86
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 84 66 83 63 73 59 68 57 70
TEMP 82 71 68 66 82 69 66 64 72 64 62 59 65 62 60 57 67 63
DEWPT 70 68 65 65 70 67 64 63 69 64 61 58 64 59 57 55 63 58
RH 67 90 90 97 67 93 93 97 90100 97 96 97 90 90 93 87 84
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B2 B1 B1 B1 OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1
POP 12HR 60 20 90 80 80 70 60 40 30
RAIN SHWRS NM IS SC O O SC NM O NM SC NM SC SC IS IS SC
TSTMS SC SC IS 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