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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1232 AM EDT Tue Mar 17 2026
VAZ024-180800-
RAWS 441631
37.63N 79.51W Elev. 865 ft
1232 AM EDT Tue Mar 17 2026
Date 03/16/26 Tue 03/17/26 Wed 03/18/26 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 26 41 21 44 27
TEMP 29 27 26 33 39 40 32 27 24 22 23 33 41 44 40 35 32 29 28
DEWPT 15 14 14 15 13 10 9 9 10 10 11 12 13 16 18 19 20 21 23
MIN/MAX RH 90 30 62 31 81
RH 55 57 60 47 34 28 37 46 54 59 59 41 31 32 41 52 61 72 81
WIND DIR W W W W W W W W W W N S S S S S S SW W
WIND SPD 10 8 6 9 11 10 5 2 2 1 1 2 4 4 2 2 1 1 1
WIND GUST 29 24 19 21 25 25 19 12
CLOUDS FW SC FW FW SC SC FW FW SC SC SC SC SC B1 B2 B1 B1 B1 B1
CLOUDS(%) 23 26 22 16 46 44 7 10 49 29 40 35 33 53 70 53 59 53 51
VSBY 10 10 10 10 10 10 6 10 10 10 10 6
POP 12HR 80 5 0 0 5
RAIN SHWRS
SNOWSHWRS
MIX HGT 4 4 4 5 7 7 3 2 1 1 2 3 5 5 1
T WIND DIR W NW NW W W W W W NW NW E S S S S
T WIND SPD 33 28 23 19 21 23 14 14 12 5 2 5 11 13 4
DISPERSION FR PR PR VP VP VP VP VP VP VP
ADI 22 19112 84102108 7 7 6 3 5 24 65 43 2
MAX LVORI 2 2 1 1 1 1 2 2 3 3 3 2 1 1 2
STABILITY E E B C C C F G F G A B B D F
CEILING None None None None None None None 6400
STA PRES 28.38 28.50 28.54 28.68 28.73 28.76 28.68
Date 03/19Fri 03/20/26Sat 03/21/26Sun 03/22/26Mon 03/23/26
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 59 36 68 45 70 46 73 42 64
TEMP 57 53 41 38 65 61 50 48 67 63 53 48 69 63 48 42 60 55
DEWPT 35 37 35 35 43 43 42 42 46 44 43 41 42 40 35 30 28 27
RH 43 54 79 89 45 51 74 80 47 50 69 77 37 43 60 62 29 34
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 SC FW B1 B1 B1 B1 B2 B1 B1 B1 SC SC SC B1 SC SC
POP 12HR 0 5 5 20 10 10 10 10 5
RAIN SHWRS IS 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