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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1001 AM EDT Tue May 12 2026
NCZ005-122000-
RAWS 310540
36.38N 79.70W Elev. 858 ft
1001 AM EDT Tue May 12 2026
Date Tue 05/12/26 Wed 05/13/26 Thu 05/14/26
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 73 50 77 51 69
TEMP 63 71 73 67 57 55 51 54 68 75 74 67 60 56 51 53 61 67 68 63
DEWPT 45 42 41 44 42 42 44 47 52 52 54 56 57 54 50 48 44 42 41 41
MAX/MIN RH 32 79 43 96 37
RH 52 35 31 43 57 61 77 77 57 45 50 68 90 93 96 83 53 40 37 44
WIND DIR S S S S S S SW SW SW SW SW SW SW NW NW NW NW NW NW NW
WIND SPD 3 4 5 4 5 8 6 6 10 11 10 4 4 4 4 6 10 11 12 8
CLOUDS FW FW CL FW FW FW CL CL FW SC B1 B2 B2 FW FW CL FW FW FW FW
CLOUDS(%) 6 9 4 6 12 6 5 4 17 35 51 74 74 15 12 4 9 21 15 17
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 40 60 0
RAIN SHWRS IS NM NM
TSTMS IS IS
MIX HGT 3 7 7 <1 <1 <1 <1 <1 4 7 5 <1 <1 <1 <1 2 5 7 7 1
T WIND DIR SW S S S S S S SW SW SW SW SW W NW NW NW NW NW NW NW
T WIND SPD 2 6 10 4 6 6 8 14 18 19 20 9 3 10 8 20 19 18 20 10
DISPERSION VP PR PR PR VP VP VP VP PR
ADI 10 57 88 2 3 5 4 18 85 91 84 6 2 5 4 51114 85 99 7
MAX LVORI 2 1 1 2 3 3 4 3 1 1 1 3 6 7 6 4 1 1 1 2
STABILITY A A A F F E F B B C C E E F F B B C C E
CEILING None None None None 4900 4200 None None None
STA PRES 29.42 29.41 29.38 29.32 29.16 29.14 29.17 29.19 29.15
Date Fri 05/15/26Sat 05/16/26Sun 05/17/26Mon 05/18/26
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 46 76 54 86 62 90 64 91
TEMP 48 50 73 70 57 59 84 80 67 66 89 83 70 68 90 85
DEWPT 41 41 42 46 46 50 55 57 57 59 59 60 60 62 61 61
RH 77 71 33 42 67 72 37 45 70 78 37 46 71 81 38 45
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW CL FW FW SC FW FW FW SC SC FW SC SC SC FW FW
POP 12HR 0 0 5 5 10 10 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