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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 AM EDT Thu May 21 2026
VAZ012-212000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
401 AM EDT Thu May 21 2026
Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26
UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20
MAX/MIN TEMP 75 54 64 53 69
TEMP 61 62 72 72 68 66 62 59 57 55 59 62 64 61 58 56 56 56 62 67 69 66
DEWPT 58 61 63 64 63 62 60 58 56 55 59 59 60 58 57 56 54 56 60 62 63 63
MAX/MIN RH 66 100 86 100 82
RH 90 97 73 76 84 87 93 96 96100100 90 87 90 96100 93100 93 84 81 90
WIND DIR N N SE SE N E E E E E E SE SE E SE SE SE SE SE S S S
WIND SPD 0 0 1 1 1 1 2 2 2 3 3 3 3 4 4 3 3 3 3 3 3 2
CLOUDS B2 B2 B1 OV OV OV OV OV OV OV B2 OV OV OV B2 OV OV OV OV OV OV B2
CLOUDS(%) 82 81 67 95 94 93 95 93 90 89 83 92 91 93 86 96 96 96 96 92 92 78
VSBY 5 7 10 6 4 3 3 4 5 5 5 3 3 3 10 10 10 10 10 10 10 10
POP 12HR 100 80 90 90 90
RAIN SHWRS IS SC O O O SC SC SC SC SC O O O O O O O O O O SC
TSTMS SC SC SC IS
Obvis F F F F F PF
MIX HGT <1 <1 2 2 1 <1 <1 <1 <1 <1 1 1 1 1 <1 <1 <1 <1 1 2 2 1
T WIND DIR W W W NE N N E E E E E E E E SE SE SE SE SE S S S
T WIND SPD 4 1 2 2 3 9 12 10 8 6 8 8 9 9 11 8 5 5 6 11 13 11
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 2 1 6 5 5 4 6 5 4 7 13 14 17 6 8 4 3 6 11 31 34 5
MAX LVORI 6 8 3 4 5 5 6 6 8 8 5 5 4 5 8 9 8 8 5 4 3 5
STABILITY F B B B B F F F F B B B B E E F F B B B B F
CEILING 200 200 200 200 200 200 200 100 200 900
STA PRES 27.32 27.29 27.33 27.33 27.37 27.35 27.37 27.37 27.40 27.35
Date Sun 05/24/26Mon 05/25/26Tue 05/26/26Wed 05/27/26
UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20
MIN/MAX TEMP 56 81 58 76 59 77 58 76
TEMP 60 61 75 71 63 61 75 71 63 62 75 71 63 61 75 71
DEWPT 60 61 64 63 59 61 64 64 61 62 65 64 61 61 63 63
RH 100100 69 76 87100 69 79 93100 71 79 93100 66 76
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 OV B2 B2 B2 OV B2 B1 B2 OV B1 B1 B2 OV
POP 12HR 30 80 40 90 40 90 40 90
RAIN SHWRS SC SC O SC IS NM O SC IS O O SC IS NM O
TSTMS SC SC IS SC IS IS SC IS IS 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