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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
431 PM EDT Tue May 12 2026
VAZ046-130800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
431 PM EDT Tue May 12 2026
Date 05/12/26 Wed 05/13/26 Thu 05/14/26 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 50 76 49 67 45
TEMP 70 66 58 55 52 53 67 74 73 66 59 55 50 51 61 65 66 59 53 50 48 52
DEWPT 43 45 42 41 41 43 48 50 53 55 56 53 49 47 44 43 42 41 40 41 39 40
MIN/MAX RH 71 43 95 41 77
RH 38 47 55 59 66 69 50 43 49 68 90 93 96 86 53 45 42 51 61 71 71 63
WIND DIR SW S S S SW SW SW SW SW SW SW W W NW NW NW NW NW NW W W W
WIND SPD 9 6 8 9 10 11 13 12 10 6 4 5 5 8 10 11 12 8 5 5 5 5
WIND GUST 20 21 24 23 24 23 17 18 20 19
CLOUDS CL FW CL CL CL CL SC SC B1 B2 B2 SC CL CL SC B1 B1 FW FW CL CL CL
CLOUDS(%) 3 7 5 4 3 2 27 50 65 84 86 40 5 3 28 55 51 24 10 5 3 2
VSBY 10 10 10 10 9 10 10 10 10 10 8 10 10 10 10 10 10 10
POP 12HR 0 40 60 0 0
RAIN SHWRS SC SC NM
TSTMS IS IS
MIX HGT 7 <1 <1 <1 <1 1 3 7 5 <1 <1 <1 <1 2 6 7 6 <1
T WIND DIR SW S S S S SW SW SW SW W SW W NW NW NW NW NW NW
T WIND SPD 10 5 4 6 8 17 24 17 16 9 2 11 12 13 13 13 18 20
DISPERSION PR PR PR FR PR VP PR PR PR PR PR PR
ADI 78 3 3 5 5 28 80 80 66 6 2 5 6 32 88 47 63 14
MAX LVORI 1 2 3 3 3 3 1 1 1 3 7 6 6 4 1 1 1 2
STABILITY B F E E E C C C C E E F F B B D D E
CEILING None None None 10500 4800 None None None None
STA PRES 29.41 29.37 29.31 29.16 29.11 29.10 29.15 29.17
Date 05/15Sat 05/16/26Sun 05/17/26Mon 05/18/26Tue 05/19/26
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 74 52 87 62 89 63 92 66 93
TEMP 71 69 56 57 84 80 67 66 89 82 69 67 91 85 72 70 92 86
DEWPT 43 46 45 47 56 59 59 60 61 62 61 61 63 63 62 63 62 62
RH 36 44 66 69 38 49 75 81 39 51 76 81 40 48 71 78 37 45
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC SC SC FW SC SC SC SC SC SC SC SC FW FW FW FW SC
POP 12HR 0 0 10 10 10 10 10 5 10
$$
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