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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 PM EDT Tue Jul 21 2026
VAZ018-220800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
401 PM EDT Tue Jul 21 2026
Date 07/21/26 Wed 07/22/26 Thu 07/23/26 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 68 84 61 76 59
TEMP 79 75 73 70 69 70 77 81 81 72 68 66 63 63 69 74 75 70 63 61 60 62
DEWPT 73 70 69 69 68 69 71 69 68 65 62 61 60 59 61 62 62 61 58 57 56 57
MIN/MAX RH 98 64 88 64 89
RH 82 84 87 97 97 97 82 67 65 79 81 84 90 87 76 66 64 73 84 87 87 84
WIND DIR SW W W W W W W W W NW NW NW N NE E E SE SE SE E E E
WIND SPD 8 6 8 6 5 5 5 5 5 4 3 2 2 3 3 3 3 3 2 1 1 2
WIND GUST 25 25 27 26 20 18 18 17 16 16
CLOUDS B1 OV B2 OV B1 SC SC B1 B1 SC B1 B1 B1 B1 B2 B1 B1 SC SC SC B1 B2
CLOUDS(%) 63 99 81 93 67 44 34 57 55 40 56 56 64 58 72 68 53 37 34 50 61 73
VSBY 6 3 3 6 6 10 7 7 7 7 7 10 7 7 7 7 7 7 7 10 10
POP 12HR 90 30 20 20 20
RAIN SHWRS SC O NM NM SC IS IS SC IS IS IS IS IS IS IS IS IS IS
TSTMS SC NM SC IS IS IS SC
MIX HGT 2 1 <1 <1 <1 1 3 4 4 <1 <1 <1 <1 1 2 3 4 1
T WIND DIR SW SW SW SW W W NW W W SW N N N NE E SE SE SE
T WIND SPD 24 11 8 9 9 8 11 9 9 8 2 8 9 11 5 2 3 5
DISPERSION PR PR PR PR VP VP VP VP VP VP VP VP
ADI 64 8 7 6 6 14 48 36 36 4 1 4 4 19 17 9 15 3
MAX LVORI 3 4 5 6 6 5 3 3 3 4 5 5 5 4 3 3 2 3
STABILITY C E D E E A A C C F F F F B B B B G
CEILING 1300 1600 None None None 4300 1300 None None
STA PRES 27.63 27.62 27.69 27.69 27.73 27.79 27.88 27.88
Date 07/24Sat 07/25/26Sun 07/26/26Mon 07/27/26Tue 07/28/26
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 75 62 73 64 83 67 87 68 86
TEMP 75 69 65 63 71 68 65 66 81 75 69 69 84 77 70 70 84 76
DEWPT 63 62 61 62 68 66 64 65 69 68 65 66 69 68 65 65 67 65
RH 66 78 87 97 90 93 97 97 67 79 87 90 61 74 84 84 57 69
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 B2 B2 SC SC SC SC SC SC SC B1 B1 B1 B1 B1
POP 12HR 20 50 50 20 20 20 30 30 30
RAIN SHWRS IS IS SC SC SC SC IS IS IS IS SC SC SC IS SC
TSTMS IS SC IS IS SC 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