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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
931 AM EDT Wed May 13 2026
NCZ005-132000-
RAWS 310540
36.38N 79.70W Elev. 858 ft
931 AM EDT Wed May 13 2026
Date Wed 05/13/26 Thu 05/14/26 Fri 05/15/26
UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20
MAX/MIN TEMP 77 52 69 45 77
TEMP 68 75 76 70 62 58 53 53 61 67 69 63 53 48 46 50 65 73 76 70
DEWPT 47 49 50 52 55 54 49 46 42 41 40 40 40 40 40 42 43 42 41 46
MAX/MIN RH 39 88 36 82 28
RH 47 40 40 53 78 86 86 77 49 39 35 43 61 74 79 74 45 33 28 42
WIND DIR SW SW SW W W NW NW NW NW NW NW NW NW NW W W NW W W SW
WIND SPD 9 9 9 3 3 4 6 9 10 10 11 6 4 3 4 4 5 5 5 2
CLOUDS FW FW SC B1 B1 SC FW CL FW FW FW FW FW CL CL CL FW FW FW FW
CLOUDS(%) 6 14 33 58 64 43 21 4 16 17 23 14 7 3 3 3 9 8 14 22
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 5 40 0 5 0
RAIN SHWRS SC SC
MIX HGT 4 6 7 <1 <1 <1 <1 2 5 7 7 <1 <1 <1 <1 1 5 6 6 <1
T WIND DIR SW SW SW SW SW NW NW NW NW NW NW NW NW W W NW NW W W S
T WIND SPD 16 12 12 9 3 13 13 20 18 17 20 11 3 4 4 12 13 11 11 1
DISPERSION VP VP VP PR PR VP VP VP VP
ADI 73 90 96 4 2 6 6 61107128 97 5 2 2 2 19 86 85 82 1
MAX LVORI 1 1 1 2 4 5 5 3 1 1 1 2 3 3 5 3 1 1 1 2
STABILITY B B B F F F F B B B C F F G F A A A A G
CEILING None 5200 None None None None None None None
STA PRES 29.15 29.10 29.11 29.17 29.18 29.26 29.28 29.32 29.28
Date Sat 05/16/26Sun 05/17/26Mon 05/18/26Tue 05/19/26
UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20
MIN/MAX TEMP 53 86 61 91 64 92 65 91
TEMP 56 58 83 79 66 65 90 83 69 68 90 84 71 68 90 84
DEWPT 45 49 54 58 57 59 58 61 61 63 61 62 63 64 60 61
RH 66 72 37 49 73 81 34 47 76 84 38 48 76 87 37 46
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC FW SC SC SC SC FW SC FW FW FW FW FW SC SC
POP 12HR 0 5 10 10 30 5 10 5
RAIN SHWRS SC
TSTMS 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