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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1031 PM EDT Tue May 12 2026
VAZ024-130800-
RAWS 441631
37.63N 79.51W Elev. 865 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 49 76 47 66 42
TEMP 58 54 51 53 69 74 72 65 58 53 48 48 59 64 65 58 51 48 45 50
DEWPT 43 41 41 43 50 54 57 56 53 49 45 44 43 42 42 40 40 39 38 39
MIN/MAX RH 70 48 90 42 81
RH 57 61 68 69 51 50 59 73 83 86 89 86 55 45 43 51 66 71 76 66
WIND DIR SW SW SW SW SW SW SW SW W NW W NW NW NW NW NW NW NW NW NW
WIND SPD 3 4 4 3 5 6 5 3 2 2 3 6 10 10 11 6 3 2 2 2
WIND GUST 14 17 16 16 17 16 13 19 23 21 24 23
CLOUDS FW CL CL CL SC B1 B2 B2 SC FW CL CL SC B1 SC FW FW FW CL CL
CLOUDS(%) 8 5 4 4 27 57 83 76 44 17 4 3 44 55 49 20 11 7 4 3
VSBY 10 10 10 10 10 10 9 10 6 6 10 10 8 9 9 9
POP 12HR 0 50 40 0 0
RAIN SHWRS SC SC SC IS
TSTMS IS SC IS
MIX HGT <1 <1 <1 1 3 4 2 <1 <1 <1 <1 2 5 6 6 2
T WIND DIR S S S SW SW SW W S W NW NW NW NW NW NW NW
T WIND SPD 5 5 6 11 17 17 9 5 6 12 9 13 19 18 23 12
DISPERSION VP VP VP VP VP VP VP PR VP VP VP
ADI 3 3 3 16 76 67 24 3 3 6 4 40116 81100 6
MAX LVORI 3 3 3 3 1 1 2 3 5 5 5 4 1 1 1 2
STABILITY G F F A A C C F F G G B B C C F
CEILING None None 4300 None None None None None
STA PRES 28.54 28.49 28.37 28.32 28.32 28.36 28.38
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 76 52 87 60 90 63 92 66 93
TEMP 73 69 55 56 85 80 65 64 88 82 68 66 90 85 71 69 91 85
DEWPT 43 47 44 48 59 61 58 59 62 63 59 60 63 64 61 62 63 64
RH 34 45 66 74 41 52 78 84 42 53 73 81 41 50 71 78 40 50
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC SC SC FW SC B1 SC SC SC SC SC FW FW FW FW FW B1
POP 12HR 0 0 20 30 30 10 10 5 30
RAIN SHWRS IS SC SC SC
TSTMS IS SC 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