Print This Forecast (Printer-Friendly)
EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Wed Sep 23 2026
VAZ018-240800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
231 AM EDT Wed Sep 23 2026
Date 09/22/26 Wed 09/23/26 Thu 09/24/26 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 55 58 50 63 43
TEMP 56 55 55 55 55 53 55 55 53 52 55 60 62 55 50 48 46 45
DEWPT 54 54 53 53 54 52 51 49 48 47 49 49 47 48 45 43 41 40
MIN/MAX RH 100 92 98 58 86
RH 93 96 93 93 96 96 86 80 83 83 80 67 58 77 83 83 83 82
WIND DIR E E E E E E NE NE NE NE NE E NE NE NE N N NW
WIND SPD 8 8 6 6 6 6 8 8 8 8 5 4 4 3 4 4 4 4
WIND GUST 26 25 20 18 18 21 23 24 25 24 17 14 16 14 17
CLOUDS OV B2 OV B2 OV B2 OV OV OV B2 B2 B2 B1 CL FW FW CL CL
CLOUDS(%) 89 87 88 83 88 85 93 93 89 83 86 86 62 3 17 10 2 3
VSBY 3 2 4 3 3 5 4 7 8 10 10 10 10 10
POP 12HR 50 60 80 40 0
RAIN C C C C C D C
RAIN SHWRS SC SC NM
TSTMS
MIX HGT 1 1 1 1 1 1 1 1 1 1 2 2 2 <1
T WIND DIR NE NE NE NE NE NE NE NE NE NE N NE NE NE
T WIND SPD 11 11 13 13 12 12 12 13 14 13 12 12 13 11
DISPERSION PR PR PR PR PR VP VP VP VP
ADI 10 16 21 22 20 8 14 15 17 21 21 24 28 5
MAX LVORI 6 5 5 5 5 8 5 5 5 5 5 3 3 4
STABILITY D D D D D E D D D D D D D F
CEILING 100 200 200 200 200 200 None None
STA PRES 27.98 28.03 28.02 28.02 27.97 27.98 27.96
Date 09/25Sat 09/26/26Sun 09/27/26Mon 09/28/26Tue 09/29/26
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 71 45 75 48 73 50 75 50 79
TEMP 71 58 49 46 74 60 51 49 71 60 53 51 73 62 54 51 76 66
DEWPT 43 43 41 41 46 47 45 45 49 48 47 46 53 51 49 48 58 57
RH 36 57 74 83 37 62 80 86 46 64 80 83 49 67 83 89 54 73
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS CL CL CL CL CL CL CL FW FW FW FW FW FW FW FW FW FW FW
POP 12HR 0 0 0 0 0 0 0 0 0
$$
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