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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
431 PM EDT Mon Sep 21 2026
VAZ024-220800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
431 PM EDT Mon Sep 21 2026
Date 09/21/26 Tue 09/22/26 Wed 09/23/26 Thu
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 63 70 55 61 52
TEMP 76 70 68 67 66 65 68 69 67 63 60 59 57 56 59 60 60 58 57 56 55 53
DEWPT 70 68 66 65 64 64 67 67 64 62 60 59 57 55 58 58 57 58 57 56 54 53
MIN/MAX RH 98 91 99 91 100
RH 82 93 93 93 93 97 97 93 90 97100100100 96 96 93 90100100100 96100
WIND DIR SE E E E NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE
WIND SPD 3 3 1 1 1 1 2 3 4 5 5 4 5 6 5 5 5 6 5 4 5 6
WIND GUST 17 20 20 21 21 17 16 16 20 23 21 23 21
CLOUDS B2 B2 OV B2 B2 B2 OV OV OV OV OV OV B2 OV OV B2 B2 OV B2 B2 B2 B1
CLOUDS(%) 87 87 96 86 86 86 93 95 88 97 95 92 86 88 88 85 83 88 87 85 73 69
VSBY 9 8 5 2 2 2 3 3 3 4 3 3 3 6 6 6 6 10
POP 12HR 90 80 90 80 70
RAIN C D D C D D L L L L C C C
RAIN SHWRS NM NM O O O O SC NM O
TSTMS SC SC SC IS IS IS IS IS IS
MIX HGT 2 <1 <1 <1 <1 <1 1 1 1 1 1 1 1 1 2 2 2 2
T WIND DIR E E E E E E E NE NE NE NE NE NE NE NE NE NE NE
T WIND SPD 9 8 9 8 3 5 6 8 13 10 10 10 12 12 13 12 12 13
DISPERSION VP VP VP VP PR PR VP PR PR PR VP PR
ADI 23 4 4 4 2 6 10 15 21 7 7 7 8 19 23 22 23 9
MAX LVORI 3 6 7 8 8 9 6 5 4 8 8 8 8 5 5 5 4 8
STABILITY C F F F F C C C D E E E E D D D D E
CEILING 1000 600 300 400 800 900 1200 500 500
STA PRES 28.55 28.58 28.61 28.61 28.68 28.68 28.73 28.74
Date 09/24Fri 09/25/26Sat 09/26/26Sun 09/27/26Mon 09/28/26
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 64 48 72 46 74 47 76 49 77
TEMP 62 56 51 49 70 62 51 47 72 62 52 49 73 64 54 51 75 65
DEWPT 57 55 51 48 51 49 46 44 49 50 48 46 52 54 51 49 57 60
RH 84 96100 96 51 62 83 89 44 65 86 89 48 70 90 93 54 84
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B1 B1 SC FW FW FW FW FW FW FW FW FW SC SC SC FW SC
POP 12HR 30 0 0 0 0 0 0 5 0
RAIN C
$$
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