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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
132 AM EDT Tue Mar 17 2026
VAZ046-180800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
132 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 28 44 24 43 29
TEMP 31 29 28 35 41 42 35 29 27 25 26 35 41 43 39 34 33 31 31
DEWPT 17 15 14 15 13 11 9 9 10 10 11 10 11 13 16 17 18 19 21
MIN/MAX RH 81 28 55 29 66
RH 56 55 55 43 31 28 33 42 48 52 52 35 29 29 39 49 53 61 66
WIND DIR W W W W W W W NW W NW N SE S S S S S SW SW
WIND SPD 14 11 9 11 13 13 9 5 3 2 2 4 5 6 3 3 4 4 4
WIND GUST 26 21 24 25 27 20
CLOUDS FW FW FW FW SC SC FW CL SC SC SC SC SC SC B1 B1 B1 B1 B1
CLOUDS(%) 20 18 13 12 29 36 7 1 30 38 28 36 50 47 52 51 60 64 62
VSBY 10 10 10 10 10 9 8 10 10 10 10 10
POP 12HR 80 0 0 0 0
RAIN SHWRS
SNOWSHWRS
TSTMS
MIX HGT 2 3 4 5 7 8 <1 <1 <1 <1 1 3 5 5 <1
T WIND DIR W W W W W W W NW NW NW E S S S S
T WIND SPD 27 26 20 16 19 20 18 17 11 5 5 5 10 12 4
DISPERSION GD FR PR PR VP VP VP VP VP VP
ADI 31 18 74 66 93 74 12 8 5 3 8 24 59 75 2
MAX LVORI 1 2 1 1 1 1 2 2 2 2 2 2 1 1 2
STABILITY D E C C C D E F G G B B B B F
CEILING None None None None None None None None
STA PRES 29.24 29.36 29.39 29.54 29.60 29.63 29.55
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 37 67 47 70 48 73 44 63
TEMP 55 53 42 39 64 60 51 49 67 63 54 50 70 65 51 44 59 56
DEWPT 33 36 35 35 41 41 42 42 45 43 42 41 42 40 35 31 28 28
RH 43 52 76 85 43 49 71 77 45 48 64 71 36 40 54 60 30 34
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC FW SC B1 B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC
POP 12HR 0 5 5 20 10 10 5 10 5
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