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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Wed May 13 2026
NCZ003-140800-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
231 AM EDT Wed May 13 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 77 47 67 43
TEMP 47 51 67 73 74 68 59 54 49 48 57 63 65 62 52 46 44 48
DEWPT 39 41 47 50 53 55 53 48 43 39 40 41 40 40 40 39 38 39
MIN/MAX RH 84 45 82 38 80
RH 74 68 49 44 48 63 80 80 80 71 53 44 40 44 63 76 79 71
WIND DIR N N S SW SW W NW NW NW NW NW NW NW NW NW NW NW NW
WIND SPD 0 0 5 5 4 2 3 4 6 11 11 11 10 5 2 2 2 2
WIND GUST 13 21 23 25 23 21 19 16
CLOUDS FW CL FW SC B1 B1 SC FW CL CL CL CL FW FW FW FW CL FW
CLOUDS(%) 6 1 8 27 60 52 40 13 3 3 4 5 11 8 9 6 5 7
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 20 20 0 5
RAIN SHWRS IS
TSTMS IS
MIX HGT <1 <1 4 6 3 <1 <1 <1 <1 3 4 6 6 <1
T WIND DIR SW SW SW SW SW W W NW NW NW NW NW NW NW
T WIND SPD 6 10 13 11 12 10 8 13 11 17 24 23 23 13
DISPERSION VP VP VP VP PR PR VP VP VP
ADI 3 10 59 76 42 5 4 6 5 57 92100104 6
MAX LVORI 3 3 1 1 1 3 5 4 4 3 1 1 1 2
STABILITY G A B B C F F F F C C C C F
CEILING None None None 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 52 85 57 89 59 90 60 89
TEMP 73 70 54 57 81 78 62 62 86 81 65 65 87 83 66 65 87 83
DEWPT 42 48 44 48 57 60 55 56 59 61 58 58 61 63 60 59 61 62
RH 33 45 69 72 44 54 78 81 40 51 78 78 42 51 81 81 42 49
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW SC SC SC B1 SC SC FW FW SC SC FW FW FW FW FW SC
POP 12HR 0 5 10 10 20 10 10 20 20
RAIN SHWRS IS IS IS
TSTMS IS IS
$$
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