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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 PM EDT Tue Sep 22 2026
VAZ024-230800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
401 PM EDT Tue Sep 22 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 61 51 64 44
TEMP 67 62 60 59 58 57 58 60 60 56 56 55 54 52 57 62 62 58 51 49 46 45
DEWPT 64 61 58 58 56 55 56 56 55 55 53 53 52 50 51 51 51 51 48 46 44 43
MIN/MAX RH 96 86 93 66 96
RH 90 97 93 96 93 93 93 87 84 96 90 93 93 93 80 67 67 77 89 89 93 93
WIND DIR NE NE NE NE N N NE NE NE NE NE NE NE N NE NE NE NE N N N N
WIND SPD 5 5 4 4 5 6 5 5 5 5 5 4 5 6 6 5 5 4 3 2 3 4
WIND GUST 18 19 20 21 20 16 16 16 18 23 21 21 21 17 13 13 14 17
CLOUDS OV OV OV OV OV B2 OV OV OV OV OV OV B2 B2 B2 B2 B1 B1 SC FW CL CL
CLOUDS(%) 94 97 91 88 90 82 91 92 91 97 93 89 85 71 87 80 59 51 34 15 1 0
VSBY 3 2 1 1 2 1 2 4 4 5 5 6 6
POP 12HR 90 70 80 30 0
RAIN L D L D L C C C C L L L C C
RAIN SHWRS NM
TSTMS SC
MIX HGT 1 1 1 1 1 1 1 2 1 1 <1 1 1 1 2 2 2 <1
T WIND DIR NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE
T WIND SPD 13 12 12 11 12 13 14 14 13 13 14 12 16 16 16 13 14 12
DISPERSION PR VP VP PR PR PR VP PR VP VP VP VP
ADI 21 8 8 8 8 18 23 26 22 9 10 8 11 24 30 29 30 8
MAX LVORI 4 8 8 8 8 5 5 4 4 8 7 8 6 5 4 3 1 4
STABILITY D E E E E D D D D E E E E D D D D E
CEILING 400 400 500 1200 500 500 500 500 None
STA PRES 28.69 28.71 28.77 28.76 28.75 28.71 28.71 28.70
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 74 46 76 48 77 49 79 51 80
TEMP 72 61 50 47 74 63 52 50 75 64 54 51 77 66 56 53 79 69
DEWPT 45 45 44 43 47 49 47 46 51 52 50 49 54 57 53 52 59 62
RH 38 56 80 86 38 60 83 86 43 65 86 93 45 73 90 96 50 78
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW FW FW SC FW FW SC SC SC SC SC SC SC FW SC
POP 12HR 0 0 0 0 0 0 5 5 5
$$
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