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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 PM EDT Tue May 12 2026
NCZ005-130800-
RAWS 310540
36.38N 79.70W Elev. 858 ft
731 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 49 77 51 69 45
TEMP 67 56 54 50 53 67 75 76 69 61 57 52 53 62 67 69 61 54 50 48 52
DEWPT 43 41 41 41 45 49 50 51 54 56 54 49 46 43 41 41 41 40 40 40 40
MIN/MAX RH 76 41 89 36 78
RH 42 57 61 71 74 52 41 42 59 84 90 89 77 50 39 36 48 59 68 74 63
WIND DIR S S S SW SW SW SW SW SW SW NW NW NW NW NW NW NW NW NW W W
WIND SPD 4 5 8 5 5 10 10 10 4 4 5 5 8 10 11 12 8 4 3 4 4
CLOUDS CL CL CL CL CL FW FW SC B1 B2 SC FW CL FW FW FW FW FW FW CL CL
CLOUDS(%) 4 5 4 3 2 16 24 32 69 74 34 11 4 13 23 17 16 11 7 4 4
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 20 40 0 0
RAIN SHWRS SC SC
MIX HGT <1 <1 <1 <1 <1 3 6 7 <1 <1 <1 <1 2 5 7 7 <1
T WIND DIR S S S SW SW SW SW SW W SW NW NW NW NW NW NW NW
T WIND SPD 5 4 6 5 12 14 12 12 10 3 13 12 16 19 18 20 12
DISPERSION VP PR PR PR VP VP PR PR PR VP VP VP
ADI 3 2 5 3 12 63 88 91 7 2 6 6 45116 86 99 8
MAX LVORI 2 3 3 3 3 1 1 1 3 5 5 6 3 1 1 1 2
STABILITY F F E F A B B B E E F F B B C C E
CEILING None None None None 5300 None None None None
STA PRES 29.40 29.37 29.31 29.14 29.09 29.11 29.15 29.18
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 76 54 87 62 90 65 91 67 92
TEMP 72 71 57 59 85 80 67 66 89 83 70 68 90 85 72 70 91 85
DEWPT 40 45 45 48 55 58 58 60 60 61 61 62 61 61 62 64 61 61
RH 31 39 64 67 36 47 73 81 38 47 73 81 38 45 71 81 37 45
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW FW FW SC SC SC SC SC FW FW FW FW FW FW FW
POP 12HR 0 0 5 10 10 10 5 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