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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 AM EDT Fri May 15 2026
NCZ003-152000-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
401 AM EDT Fri May 15 2026
Date Fri 05/15/26 Sat 05/16/26 Sun 05/17/26
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 75 51 83 59 88
TEMP 43 48 63 71 75 69 59 54 52 56 71 79 82 77 68 63 60 63 76 85 87 82
DEWPT 37 38 38 39 41 44 43 44 44 46 49 51 52 53 53 52 52 54 58 57 57 59
MAX/MIN RH 29 74 36 77 35
RH 79 68 39 31 29 40 55 69 74 69 46 38 35 43 59 67 75 72 54 39 36 46
WIND DIR NW NW NW W SW S SW SW S SW SW SW SW S SW SW SW SW SW S S S
WIND SPD 5 4 4 4 3 3 2 2 2 2 6 9 8 6 6 4 4 3 4 5 6 5
CLOUDS CL CL CL CL FW SC FW FW SC SC FW FW SC OV SC SC B1 B1 SC FW FW FW
CLOUDS(%) 1 2 1 2 16 39 9 11 35 27 15 19 33 89 40 40 54 56 39 24 22 24
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 5 0 0 5
MIX HGT <1 <1 4 6 6 <1 <1 <1 <1 <1 3 5 5 <1 <1 <1 <1 <1 3 6 7 <1
T WIND DIR W W NW W SW SW S SW SW SW SW SW SW SW SW SW W SW SW S S S
T WIND SPD 3 3 8 9 8 5 2 2 2 3 14 13 12 6 4 4 2 1 6 6 10 8
DISPERSION PR VP VP VP VP PR PR VP VP PR
ADI 2 3 44 66 59 3 1 1 1 3 52 79 74 5 2 2 2 1 25 50 81 4
MAX LVORI 4 3 1 1 1 2 3 3 3 3 1 1 1 2 3 3 4 3 2 1 1 2
STABILITY F A A A A G G G G A B B B E F F E B A A B F
CEILING None None None None None None None None None None
STA PRES 29.04 28.99 29.05 29.09 29.12 29.06 29.08 29.10 29.15 29.13
Date Mon 05/18/26Tue 05/19/26Wed 05/20/26Thu 05/21/26
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 63 89 63 89 65 89 65 84
TEMP 66 67 87 84 69 67 86 83 70 68 86 82 69 67 81 76
DEWPT 58 60 59 57 58 60 56 54 57 60 58 58 61 61 59 60
RH 75 78 39 40 68 78 36 37 63 76 39 44 76 81 47 58
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW CL FW FW CL FW FW FW FW FW B1 B1 SC B1 B2
POP 12HR 5 5 5 5 5 30 30 60
RAIN SHWRS SC SC IS SC NM
TSTMS 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