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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
501 AM EDT Mon Jul 20 2026
VAZ046-202000-
RAWS 441101
37.39N 78.80W Elev. 804 ft
501 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 84 69 89 70 87
TEMP 70 77 83 83 78 73 72 70 72 82 87 85 80 76 73 71 73 81 86 85 79
DEWPT 67 70 72 72 73 72 71 70 72 76 77 77 75 74 73 71 73 75 73 72 71
MAX/MIN RH 68 100 71 100 64
RH 90 79 70 70 85 97 97100100 82 72 77 85 94100100100 82 65 65 77
WIND DIR NE NE E SE SE SE SW SW SW SW SW SW SW SW SW SW SW W W W SW
WIND SPD 4 4 4 4 3 3 3 4 8 10 13 13 12 11 10 10 10 10 10 8 5
WIND GUST 24 24 24 23 21 21
CLOUDS B1 B1 B1 B1 SC B2 B1 B2 B1 B1 B2 B2 B2 B2 OV OV B2 B2 B1 B1 B1
CLOUDS(%) 61 66 60 59 48 80 67 74 64 65 80 74 84 84 93 93 75 75 67 67 51
VSBY 10 10 10 10 10 9 7 7 9 10 10 10 10 6 3 3 10 10 10 3 10
POP 12HR 50 70 70 90 60
RAIN SHWRS IS IS SC IS SC SC SC NM SC O O O O NM NM SC SC SC
TSTMS IS SC IS SC IS SC SC SC SC SC IS SC SC IS
Obvis PF
MIX HGT 1 2 4 4 <1 <1 <1 <1 1 3 3 2 1 <1 <1 <1 1 3 4 4 <1
T WIND DIR NE E SE SE SE SE S S SW W SW SW SW SW S W SW SW SW S SW
T WIND SPD 12 8 2 5 12 11 9 9 12 18 23 20 17 6 6 19 14 28 27 10 9
DISPERSION VP VP VP VP FR FR FR FR PR
ADI 18 22 8 20 6 5 4 6 19 58 58 57 15 6 6 18 28 98108 37 6
MAX LVORI 5 3 3 3 5 9 9 8 5 4 3 3 4 6 8 5 4 3 1 3 4
STABILITY C C C C F F F E C C D C D D D D C C C C E
CEILING 2800 2600 4100 3200 1200 10900 4500 1700 1700 2500
STA PRES 29.26 29.21 29.19 29.15 29.16 29.13 29.10 29.12 29.12 29.13
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 64 81 62 82 64 81 65 86
TEMP 68 66 79 73 64 65 80 75 66 66 79 75 66 68 85 80
DEWPT 65 61 63 64 62 62 64 64 63 64 67 67 64 66 69 70
RH 90 84 58 73 93 90 58 69 90 93 67 76 93 93 59 72
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 SC SC SC FW SC B1 B1 B1 B2 B1 B1 B1 SC SC SC
POP 12HR 30 10 20 10 20 20 10 20
RAIN SHWRS SC IS IS IS IS IS IS IS IS
TSTMS IS IS 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