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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Thu Sep 24 2026
VAZ046-250800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
801 PM EDT Thu Sep 24 2026
Date 09/24/26 Fri 09/25/26 Sat 09/26/26 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 48 73 50 78 52
TEMP 52 50 48 49 63 69 72 62 55 53 51 51 69 74 76 66 57 54 52 53
DEWPT 49 46 43 42 43 43 43 43 43 43 42 44 48 48 48 49 48 47 47 48
MIN/MAX RH 89 36 76 36 85
RH 89 86 83 77 48 39 35 50 64 69 71 77 47 40 37 54 72 77 83 83
WIND DIR NE N N N N N N N N N NW NW N N N N NW NW NW W
WIND SPD 8 6 8 9 13 11 10 5 5 6 6 6 9 10 9 3 4 4 5 5
WIND GUST 19 17
CLOUDS FW SC FW FW CL FW FW FW CL CL CL CL CL FW CL CL CL CL FW FW
CLOUDS(%) 25 33 9 12 3 15 15 9 0 0 2 0 4 6 5 2 3 4 9 14
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 0 0
MIX HGT <1 <1 <1 <1 3 4 4 <1 <1 <1 <1 <1 4 5 6 <1
T WIND DIR NE N N N N N N N NW NW NW NW N NW NW NW
T WIND SPD 9 8 8 8 20 19 17 4 3 4 4 5 11 11 16 6
DISPERSION PR PR PR PR PR PR PR VP VP VP PR
ADI 6 4 5 9 63 70 65 2 2 2 2 6 42 48 71 3
MAX LVORI 5 6 4 4 1 1 1 2 3 3 3 4 1 1 1 2
STABILITY E F E C C C C F F F F B C C C G
CEILING None None None None None None None None None
STA PRES 29.50 29.44 29.42 29.34 29.36 29.33 29.30 29.22
Date 09/27Mon 09/28/26Tue 09/29/26Wed 09/30/26Thu 10/01/26
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 79 55 80 55 81 55 83 61 84
TEMP 77 69 58 56 75 70 59 57 78 70 58 57 79 74 64 62 80 75
DEWPT 50 51 51 51 56 57 56 56 59 58 57 56 61 61 60 61 65 64
RH 39 53 77 83 52 63 90 96 52 66 96 96 54 64 87 97 60 69
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW SC SC B1 B1 SC SC FW FW CL FW FW SC SC SC SC SC
POP 12HR 0 0 0 0 0 0 5 10 20
RAIN SHWRS 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