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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 PM EDT Wed May 13 2026
NCZ005-140800-
RAWS 310540
36.38N 79.70W Elev. 858 ft
231 PM EDT Wed May 13 2026
Date 05/13/26 Thu 05/14/26 Fri 05/15/26 Sat
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 51 68 46 77 52
TEMP 77 72 62 58 53 53 61 65 67 62 52 48 46 51 65 73 76 70 59 55 52 57
DEWPT 49 51 54 54 50 47 42 41 40 40 39 40 40 42 42 41 42 47 45 45 45 47
MIN/MAX RH 91 37 80 28 77
RH 37 48 75 86 89 80 49 41 37 44 61 74 79 71 43 31 30 44 60 69 77 69
WIND DIR SW W W NW NW NW NW NW NW NW NW W W W NW W W SW SW SW SW SW
WIND SPD 9 3 3 4 5 9 10 11 11 6 4 4 4 4 5 5 4 2 2 2 3 5
CLOUDS SC B1 B1 SC FW CL CL FW FW FW FW CL CL CL FW FW FW FW FW FW FW SC
CLOUDS(%) 33 58 65 43 21 2 2 25 10 7 6 5 4 3 8 16 8 25 11 19 24 33
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 40 0 0 0 0
RAIN SHWRS SC SC
MIX HGT 7 <1 <1 <1 <1 2 5 7 7 <1 <1 <1 <1 1 5 6 6 <1
T WIND DIR SW SW SW NW NW NW NW NW NW NW NW W W NW NW W W S
T WIND SPD 12 9 3 13 13 20 18 17 20 11 3 4 4 12 13 11 11 1
DISPERSION VP VP VP PR PR VP VP VP VP VP VP VP
ADI 96 4 2 6 6 61107128 97 5 2 2 2 19 86 85 82 1
MAX LVORI 1 2 4 5 5 3 1 1 1 2 3 3 5 3 1 1 1 2
STABILITY B F F F F B B B C F F G F A A A A G
CEILING None 5200 None None None None None None None None
STA PRES 29.15 29.10 29.11 29.17 29.18 29.26 29.28 29.32 29.28
Date 05/16Sun 05/17/26Mon 05/18/26Tue 05/19/26Wed 05/20/26
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 85 61 87 63 88 65 87 66 87
TEMP 83 80 66 65 86 80 67 66 88 82 69 68 87 82 70 69 87 81
DEWPT 52 56 55 58 58 60 60 62 61 62 61 63 60 61 61 64 61 62
RH 34 44 68 78 39 51 78 87 40 51 76 84 40 49 73 84 42 53
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC SC SC SC FW FW FW FW FW FW FW FW SC SC SC B1
POP 12HR 5 5 5 5 5 0 5 10 40
RAIN SHWRS SC
TSTMS 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