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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
258 AM EDT Sun Sep 13 2026
VAZ046-140800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
258 AM EDT Sun Sep 13 2026
Date 09/12/26 Sun 09/13/26 Mon 09/14/26 Tue
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 68 89 67 83 55
TEMP 69 70 81 87 88 78 73 70 68 69 79 81 83 75 66 61 57 57
DEWPT 69 70 73 72 71 71 69 68 66 67 68 67 64 61 57 53 51 51
MIN/MAX RH 100 57 95 53 85
RH 100100 77 61 57 79 87 93 93 93 69 63 53 62 73 75 80 80
WIND DIR SW SW W NW NW E NW W W N NE NE NE NE NE NE N N
WIND SPD 3 4 5 4 4 2 2 3 3 4 9 8 8 6 5 4 4 4
CLOUDS B1 B1 SC SC FW SC FW SC FW FW FW SC FW FW FW FW FW FW
CLOUDS(%) 69 55 30 29 25 30 16 33 10 9 25 38 9 7 9 13 23 18
VSBY 2 3 10 10 10 10 9 9 7 10 10 10 10 10 10 10 10 10
POP 12HR 70 20 0 5 0
RAIN SHWRS IS
TSTMS
MIX HGT <1 <1 2 5 4 <1 <1 <1 <1 <1 3 5 5 <1 <1 <1 <1 <1
T WIND DIR NW SW N N W S W W W NW N N N NE NE NE N N
T WIND SPD 5 1 4 4 2 2 2 3 4 4 13 10 11 14 9 8 3 5
DISPERSION VP VP VP VP VP PR PR VP VP
ADI 3 1 14 24 11 1 1 2 2 5 46 57 67 7 4 4 2 6
MAX LVORI 9 10 4 2 2 4 6 7 6 6 3 1 1 3 3 4 5 4
STABILITY F D B B B G G G G B C B B F F F F B
CEILING 300 None None None None None None None None
STA PRES 29.23 29.27 29.20 29.24 29.26 29.35 29.38 29.50 29.56
Date 09/15Wed 09/16/26Thu 09/17/26Fri 09/18/26Sat 09/19/26
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 81 56 86 60 89 63 90 64 87
TEMP 79 72 59 59 83 76 64 62 86 78 67 65 88 80 69 65 85 76
DEWPT 58 58 57 57 64 63 60 60 63 62 61 61 66 66 64 63 66 66
RH 49 61 93 93 53 64 87 93 46 58 81 87 48 62 84 93 53 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW CL FW CL FW CL CL FW FW FW SC SC SC SC B1
POP 12HR 0 0 0 0 0 0 20 10 30
RAIN SHWRS IS SC
$$
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