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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
331 AM EDT Wed May 13 2026
NCZ001-132000-
RAWS 310142
36.40N 81.46W Elev. 4608 ft
331 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 65 42 54 41 66
TEMP 47 49 57 62 61 55 52 49 45 43 43 51 51 48 45 42 41 44 53 63 65 58
DEWPT 36 38 43 45 46 48 47 44 39 34 33 34 34 33 34 35 35 34 33 32 34 39
MAX/MIN RH 52 83 48 79 30
RH 65 66 59 54 58 77 83 83 79 70 67 52 52 56 65 76 79 68 46 31 31 49
WIND DIR SW W W W W W NW NW NW NW NW NW NW NW NW NW NW NW NW W W W
WIND SPD 10 8 12 12 14 18 17 20 20 31 25 20 23 24 16 13 12 11 8 5 6 5
CLOUDS FW FW SC B1 B1 B1 SC SC SC SC FW FW FW CL FW FW FW FW FW FW FW SC
CLOUDS(%) 9 7 27 53 60 51 40 29 27 45 17 13 15 5 13 21 10 8 9 22 25 26
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 30 0 5 0
RAIN SHWRS IS SC
TSTMS IS
MIX HGT <1 <1 5 6 4 1 1 1 1 2 3 4 4 1 <1 1 <1 1 3 4 3 <1
T WIND DIR SW SW W W W W NW NW NW NW NW NW NW NW NW NW NW NW NW W W W
T WIND SPD 8 8 14 14 18 11 26 14 19 26 28 25 26 20 25 23 12 20 13 8 10 3
DISPERSION FR GD GD GD GD GD GD FR FR PR
ADI 5 8 59 49 49 10 30 13 18 58 88 98104 23 23 21 11 40 57 41 35 2
MAX LVORI 3 3 1 1 1 4 4 4 3 3 1 1 1 2 3 3 4 3 1 1 1 2
STABILITY E B C D D D D D D C C C C D D D D C B A B F
CEILING None None None None None None None None None None
STA PRES 26.70 26.60 26.57 26.55 26.59 26.61 26.66 26.67 26.73 26.72
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 52 74 58 82 60 83 61 82
TEMP 52 58 71 67 59 61 75 71 61 63 76 72 63 63 76 72
DEWPT 39 44 51 53 50 51 52 54 53 54 54 55 55 55 54 55
RH 61 59 49 61 72 70 45 55 75 72 46 55 75 75 46 55
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC B1 SC SC FW SC FW FW FW SC FW FW FW B1
POP 12HR 5 30 10 20 10 20 10 30
RAIN SHWRS SC IS IS SC
TSTMS SC IS 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