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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1031 PM EDT Tue May 12 2026
NCZ003-130800-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
1031 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 46 76 47 67 42
TEMP 55 51 48 51 67 73 73 67 59 54 49 48 58 64 66 58 52 48 45 50
DEWPT 42 40 39 41 48 52 55 56 53 48 43 40 40 41 41 40 40 38 36 37
MIN/MAX RH 75 47 81 39 75
RH 61 66 71 68 50 48 53 68 80 80 80 74 51 43 40 51 63 68 70 61
WIND DIR SW SE SE SE S SW W SW NW NW NW NW NW NW NW NW NW NW NW NW
WIND SPD 1 1 1 1 6 6 6 3 3 6 5 11 12 11 11 6 2 2 2 2
WIND GUST 14 24 21 26 28 24 25 21 12
CLOUDS FW CL CL CL FW SC B2 B1 SC FW FW FW FW FW FW FW FW FW CL FW
CLOUDS(%) 9 4 3 5 14 49 74 61 48 10 7 8 12 13 19 12 11 9 5 11
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 40 20 0 0
RAIN SHWRS SC IS
TSTMS IS
MIX HGT <1 <1 <1 <1 4 6 3 <1 <1 <1 <1 3 4 6 6 <1
T WIND DIR S S SW SW SW SW SW W W NW NW NW NW NW NW NW
T WIND SPD 4 5 6 10 13 11 12 10 8 13 11 17 24 23 23 13
DISPERSION VP VP VP VP VP PR PR PR VP VP VP
ADI 2 3 3 10 59 76 42 5 4 6 5 57 92100104 6
MAX LVORI 3 3 3 3 1 1 1 3 5 4 4 3 1 1 1 2
STABILITY G G G A B B C F F F F C C C C F
CEILING None None 4300 None None None None None
STA PRES 28.19 28.14 28.00 27.96 27.96 28.00 28.03
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 77 53 85 58 89 60 90 62 90
TEMP 73 70 56 59 83 79 63 64 87 81 66 66 87 83 68 66 88 83
DEWPT 40 46 44 47 58 60 57 57 60 62 58 58 61 62 59 60 61 62
RH 30 42 64 64 43 52 81 78 40 53 75 75 42 49 73 81 40 49
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW SC SC FW FW SC SC SC B1 SC FW FW SC FW FW FW B1
POP 12HR 0 0 20 10 30 10 20 5 30
RAIN SHWRS IS SC IS SC
TSTMS IS SC 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
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