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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1231 AM EDT Mon May 11 2026
NCZ001-120800-
RAWS 310142
36.40N 81.46W Elev. 4608 ft
1231 AM EDT Mon May 11 2026
Date 05/10/26 Mon 05/11/26 Tue 05/12/26 Wed
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 51 55 39 62 48
TEMP 55 53 51 52 51 52 50 46 43 41 43 52 59 61 56 49 49 48 51
DEWPT 47 46 49 46 46 45 42 30 32 30 32 35 37 38 40 40 40 40 42
MIN/MAX RH 92 65 80 41 74
RH 74 77 93 80 83 77 74 53 65 65 65 52 44 42 55 71 71 74 71
WIND DIR W W NW NW NW NW NW N N N NW S S S S S S S SW
WIND SPD 5 4 6 9 6 9 8 6 5 4 4 5 4 5 6 9 11 10 13
CLOUDS B1 B2 OV OV OV B2 SC CL CL CL CL CL FW FW CL CL FW FW B1
CLOUDS(%) 68 87100100 92 77 30 4 5 3 1 2 11 10 2 4 21 15 62
VSBY 10 9 8 8 9 9 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 70 0 0 0
RAIN SHWRS IS NM NM NM SC
TSTMS IS IS
MIX HGT <1 <1 <1 2 2 3 1 <1 <1 <1 <1 5 6 5 <1
T WIND DIR W NW NW NW E NE NW NW NW NW NW NW SW SW S
T WIND SPD 4 4 6 5 2 4 9 3 3 3 3 6 3 9 9
DISPERSION PR VP PR PR PR VP PR PR FR FR
ADI 4 4 8 9 6 14 6 2 2 2 4 41 24 55 4
MAX LVORI 3 4 5 5 7 4 4 3 3 3 3 1 2 1 3
STABILITY D D D D C C E E F F A A A A F
CEILING 5100 500 500 None None None None None
STA PRES 26.73 26.76 26.75 26.81 26.83 26.85 26.82
Date 05/13Thu 05/14/26Fri 05/15/26Sat 05/16/26Sun 05/17/26
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 62 45 56 42 65 51 72 57 75
TEMP 61 57 50 47 54 51 43 45 62 58 52 56 70 66 59 60 73 69
DEWPT 48 48 45 42 38 37 36 37 39 43 41 44 49 52 50 51 52 54
RH 62 72 83 83 54 59 76 73 43 57 66 64 47 61 72 72 48 59
WIND SPD 15> <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 SC FW FW FW FW FW FW FW FW SC SC SC SC SC FW SC
POP 12HR 50 20 0 0 0 5 10 10 20
RAIN SHWRS SC SC IS IS
TSTMS SC 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