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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
931 AM EDT Mon Jul 20 2026
VAZ018-202000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
931 AM EDT Mon Jul 20 2026
Date Mon 07/20/26 Tue 07/21/26 Wed 07/22/26
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 82 68 87 68 84
TEMP 75 79 80 73 70 70 69 72 81 85 82 75 73 72 70 69 78 82 81 72
DEWPT 67 67 68 68 68 68 68 70 73 73 73 71 69 68 68 68 70 68 67 64
MAX/MIN RH 63 97 67 97 61
RH 76 67 67 84 93 93 97 93 77 67 74 87 87 87 93 97 76 63 63 76
WIND DIR SE SE S SW S S W SW SW W SW SW W W W W W W NW NW
WIND SPD 2 3 5 2 2 1 2 4 6 6 8 6 6 8 6 6 6 6 8 4
WIND GUST 16 21 21 21 25 26 27 25 24 20 20 19 18
CLOUDS SC SC SC B1 B1 B2 B1 B1 B1 B2 B2 OV OV OV OV B1 B1 SC SC FW
CLOUDS(%) 42 49 49 57 58 72 56 52 62 73 80 90 90 93 93 63 63 47 33 11
VSBY 10 10 10 10 8 5 5 6 10 10 8 10 10 10 10 10 10 10 10 10
POP 12HR 60 40 70 90 40
RAIN SHWRS IS SC SC SC IS IS SC SC NM O O O O SC SC IS IS
TSTMS IS SC SC IS IS SC SC SC SC IS IS IS IS IS
Obvis PF PF
MIX HGT 3 4 3 <1 <1 <1 <1 1 4 4 4 <1 <1 <1 <1 1 3 4 4 <1
T WIND DIR SE S SE S S SW SW SW W W W SW SW W SW SW SW SW W NW
T WIND SPD 5 5 9 13 5 3 4 10 16 14 21 23 8 20 10 18 21 12 17 16
DISPERSION VP VP VP VP PR PR PR PR VP
ADI 20 27 30 6 3 2 2 14 59 57 76 15 5 19 7 32 71 58 90 7
MAX LVORI 3 3 3 5 6 7 8 5 3 1 3 4 5 4 6 4 3 1 1 4
STABILITY A B C F F F F C C C C E E D E C C B B F
CEILING None 1500 None 1100 3400 5900 1500 2200 None
STA PRES 27.72 27.71 27.67 27.70 27.66 27.63 27.61 27.63 27.66
Date Thu 07/23/26Fri 07/24/26Sat 07/25/26Sun 07/26/26
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 60 80 61 79 63 79 64 85
TEMP 63 62 78 71 64 63 76 71 66 65 77 72 66 66 83 76
DEWPT 59 58 62 62 58 59 64 63 60 61 65 65 62 63 67 67
RH 87 87 58 73 81 87 66 76 81 87 67 79 87 90 59 74
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW SC SC SC SC B1 B1 B2 B1 B1 B2 B1 SC SC SC
POP 12HR 10 10 20 20 30 30 20 20
RAIN SHWRS IS IS IS SC IS SC IS IS IS
TSTMS IS IS SC IS 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