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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1031 PM EDT Tue May 12 2026
NCZ006-130800-
RAWS 310801
36.37N 79.29W Elev. 580 ft
1031 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 48 79 51 71 44
TEMP 57 54 49 53 69 76 78 71 62 58 53 53 63 68 70 62 54 50 48 52
DEWPT 42 43 42 46 51 50 51 54 56 55 50 47 44 42 41 41 41 41 40 41
MIN/MAX RH 79 38 92 35 82
RH 57 66 77 77 53 40 39 55 81 90 89 80 50 39 35 46 61 71 74 66
WIND DIR S S S SW SW S SW SW SW NW NW NW NW NW NW NW NW NW W W
WIND SPD 3 5 3 3 8 8 8 3 2 2 3 5 9 10 10 5 2 1 2 2
WIND GUST 19 20
CLOUDS CL CL CL CL FW FW FW B2 B2 B1 FW FW FW SC SC FW FW FW CL CL
CLOUDS(%) 3 4 2 3 8 18 23 76 70 52 18 10 8 31 29 20 9 8 3 4
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 20 40 0 0
RAIN SHWRS SC SC
TSTMS IS
MIX HGT <1 <1 <1 <1 4 6 7 <1 <1 <1 <1 2 5 7 7 <1
T WIND DIR S S S SW SW SW SW S S NW NW NW NW NW NW NW
T WIND SPD 4 6 5 6 13 11 11 3 4 14 10 13 19 19 20 11
DISPERSION VP PR VP VP VP VP VP PR VP VP VP
ADI 2 3 3 7 63 81 85 2 2 7 5 42117145157 5
MAX LVORI 3 3 3 4 1 1 1 2 5 5 6 3 1 1 1 2
STABILITY G F G A B B B F F F G A B B B F
CEILING None None None 5000 None None None None
STA PRES 29.47 29.41 29.24 29.18 29.19 29.24 29.26
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 54 89 62 92 65 93 67 94
TEMP 73 71 57 59 87 81 68 67 91 84 70 69 92 86 72 70 93 86
DEWPT 41 47 46 49 54 59 57 60 60 62 61 63 62 62 62 64 61 61
RH 31 42 67 69 32 47 68 78 36 48 73 81 37 45 71 81 35 43
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW FW FW SC SC SC SC SC SC SC FW FW FW FW FW
POP 12HR 0 0 5 10 10 10 5 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
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