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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Wed May 13 2026
VAZ024-140800-
RAWS 441631
37.63N 79.51W Elev. 865 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 49 78 47 67 43
TEMP 50 53 71 76 72 65 58 53 48 49 59 64 65 59 52 47 44 48
DEWPT 40 42 49 52 55 55 53 49 45 44 41 41 40 39 40 40 39 40
MIN/MAX RH 69 43 88 40 82
RH 68 66 46 43 55 70 83 86 89 83 51 43 40 47 63 76 82 74
WIND DIR SW SW SW SW W W W W W NW NW NW NW NW NW NW NW NW
WIND SPD 3 3 6 6 3 2 2 2 3 5 9 9 10 6 2 2 2 2
WIND GUST 17 13 12 18 19 21 23 13
CLOUDS CL CL FW B1 B2 B1 SC FW FW FW SC B1 SC FW FW FW FW CL
CLOUDS(%) 3 2 17 66 84 68 30 16 7 7 48 62 47 18 16 12 11 2
VSBY 10 10 10 10 9 10 6 6 10 10 8 9 9 9
POP 12HR 0 80 50 0 5
RAIN SHWRS SC O SC IS
TSTMS IS SC IS
MIX HGT <1 1 3 4 2 <1 <1 <1 <1 2 5 6 6 2
T WIND DIR S SW SW SW W S W NW NW NW NW NW NW NW
T WIND SPD 6 11 17 17 9 5 6 12 9 13 19 18 23 12
DISPERSION VP VP VP VP VP PR VP VP VP
ADI 3 16 76 67 24 3 3 6 4 40116 81100 6
MAX LVORI 3 3 1 1 2 3 5 5 5 4 1 1 1 2
STABILITY 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 78 52 88 59 92 63 93 64 93
TEMP 75 70 55 56 84 79 64 63 91 82 68 66 92 85 70 67 91 86
DEWPT 42 44 42 47 57 59 56 58 59 60 58 60 61 62 60 61 62 61
RH 31 39 61 72 40 50 75 84 34 47 70 81 36 46 71 81 38 43
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC SC SC SC SC SC SC SC SC FW SC FW FW SC FW SC SC
POP 12HR 0 0 10 10 20 10 10 20 10
RAIN SHWRS IS IS
TSTMS 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