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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Tue May 12 2026
NCZ001-130800-
RAWS 310142
36.40N 81.46W Elev. 4608 ft
801 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 47 64 42 53 39
TEMP 50 48 47 50 57 61 60 56 52 49 45 43 43 50 52 48 45 42 41 45
DEWPT 37 37 37 39 44 47 48 49 47 43 39 35 34 34 34 34 34 34 34 34
MIN/MAX RH 69 57 82 50 77
RH 61 65 68 66 62 60 64 77 83 80 79 73 70 54 50 58 65 73 76 65
WIND DIR S S SW W W W W W NW NW NW NW NW NW NW NW NW NW NW NW
WIND SPD 12 13 11 10 13 13 16 17 17 18 19 29 27 21 23 23 17 13 12 12
CLOUDS CL CL FW FW B1 B1 B1 B1 B1 SC B1 SC SC SC FW FW FW FW FW FW
CLOUDS(%) 3 3 15 23 59 58 63 51 62 42 51 35 28 31 19 6 10 14 14 13
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 40 30 0 0
RAIN SHWRS SC SC
TSTMS IS
MIX HGT <1 <1 <1 <1 5 5 4 2 <1 2 2 2 3 4 5 3
T WIND DIR S S SW SW W W W W NW NW NW NW NW NW NW NW
T WIND SPD 4 6 9 8 14 17 18 11 23 24 25 29 31 25 26 23
DISPERSION FR FR FR GD GD GD GD GD GD FR FR
ADI 4 6 6 8 44 53 49 13 21 27 28 77102 99107 31
MAX LVORI 3 3 3 3 1 1 1 4 3 3 3 3 3 1 1 1
STABILITY D D E B D D D D D D D C C C C D
CEILING None None None 1700 None None None None None
STA PRES 26.79 26.73 26.70 26.60 26.55 26.54 26.57 26.60
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 65 53 78 59 81 61 83 62 82
TEMP 61 58 53 58 71 68 61 62 75 71 63 63 76 72 64 65 76 72
DEWPT 35 41 39 45 53 54 52 53 53 55 53 54 54 56 55 55 55 57
RH 38 53 59 62 53 61 72 72 46 57 70 72 46 57 73 70 48 59
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW SC SC SC SC SC SC SC FW FW B1 FW SC SC B1
POP 12HR 0 0 20 10 20 5 30 10 40
RAIN SHWRS IS IS SC IS SC
TSTMS IS IS SC 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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