Print This Forecast (Printer-Friendly)
EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
901 PM EDT Fri Sep 18 2026
VAZ018-190800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
901 PM EDT Fri Sep 18 2026
Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon
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 76 66 80 66
TEMP 70 69 68 67 70 74 75 70 66 66 66 66 73 79 77 71 69 68 67 67
DEWPT 66 66 65 65 66 66 66 65 64 64 64 65 68 69 70 69 67 66 65 66
MIN/MAX RH 94 74 95 71 98
RH 87 90 90 93 87 76 74 84 93 93 93 97 84 72 79 93 93 93 93 97
WIND DIR N NE E E E SE SE SE SE SE SE S SW SW W SW W W W NW
WIND SPD 1 1 1 2 3 3 4 3 2 2 1 2 2 3 2 1 2 1 1 2
CLOUDS B1 B2 B2 OV B2 B2 B1 B2 B2 OV B2 OV B2 B2 B2 B1 B1 B1 SC B1
CLOUDS(%) 53 82 83 92 86 78 59 71 82 92 86 92 71 86 86 59 62 51 49 57
VSBY 10 6 3 2 9 10 10 9 9 7 10 10 10 3 3 7
POP 12HR 20 30 5 60 30
RAIN SHWRS IS IS IS NM NM SC SC SC
TSTMS SC SC IS
Obvis PF
MIX HGT <1 <1 <1 <1 1 2 2 <1 <1 <1 <1 <1 3 5 2 <1
T WIND DIR NW NW N NE E SE SE SE SE S S S SW W W W
T WIND SPD 3 3 2 3 5 5 3 6 6 4 3 6 11 12 10 6
DISPERSION VP VP VP VP VP VP VP VP VP VP VP
ADI 2 2 1 3 10 15 10 3 3 2 2 5 34 50 22 3
MAX LVORI 6 7 7 6 5 4 3 5 6 6 7 7 4 3 3 8
STABILITY F F F C C C C F F F F C C C C F
CEILING 400 100 5100 400 0 900 3800 7500
STA PRES 27.87 27.90 27.86 27.87 27.83 27.79 27.74
Date 09/21Tue 09/22/26Wed 09/23/26Thu 09/24/26Fri 09/25/26
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 83 63 70 57 64 56 66 55 71
TEMP 82 71 65 64 68 64 60 58 62 58 56 56 65 58 56 55 69 61
DEWPT 70 67 64 63 68 62 60 57 62 58 56 55 62 58 55 54 60 57
RH 67 87 97 97100 93100 96100100100 96 90100 96 96 73 87
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 OV B2 B2 OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1
POP 12HR 90 70 70 80 50 40 30 20 20
RAIN SHWRS SC O NM SC NM NM O NM SC SC SC SC SC SC IS IS IS
TSTMS IS 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