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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 PM EDT Tue Jul 21 2026
NCZ003-220800-
RAWS 310302
36.35N 80.48W Elev. 1076 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 72 81 65 72 61
TEMP 87 84 81 75 73 72 74 77 79 76 71 69 68 66 68 69 71 68 65 64 63 62
DEWPT 72 71 71 71 70 72 74 74 74 72 71 69 67 66 66 65 65 64 64 63 62 62
MIN/MAX RH 100 84 100 81 100
RH 61 65 72 87 90100100 90 85 87100100 97100 93 87 81 87 97 97 97100
WIND DIR SW SW SW SW SW SW SW SW SW W SW NW N NE NE E E E NE NE NE NE
WIND SPD 11 12 14 14 13 10 6 6 4 2 3 3 5 9 8 8 6 5 5 5 6 8
WIND GUST 24
CLOUDS B2 B2 B2 OV B2 OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B2 B2 B2
CLOUDS(%) 82 79 86 88 74 89 70 76 84 83 74 83 72 75 80 73 77 67 68 77 75 81
VSBY 6 6 7 6 7 4 4 4 3 3 3 3 4 6 6 6 6 6 6 6 6
POP 12HR 40 60 70 60 50
RAIN SHWRS SC IS SC SC SC SC SC SC NM NM NM NM SC NM NM SC SC SC SC SC SC SC
TSTMS SC IS SC SC SC SC SC SC NM SC SC IS IS
MIX HGT 4 <1 <1 <1 <1 1 2 2 2 <1 <1 <1 <1 1 2 3 3 1
T WIND DIR SW NW SW SW SW SW SW SW N NE E N N NE NE NE NE NE
T WIND SPD 25 6 2 6 10 16 14 10 6 3 3 3 3 9 17 13 11 9
DISPERSION FR GD GD FR VP VP VP PR PR PR PR PR
ADI 98 6 2 6 9 20 33 26 16 2 2 2 2 17 44 40 35 6
MAX LVORI 1 3 3 5 5 5 4 4 4 7 10 10 9 5 4 4 3 5
STABILITY C D D D D C C C C F F F E C C C C E
CEILING 3000 1100 1200 1900 1200 2400 2200 4000 5400
STA PRES 28.79 28.78 28.88 28.87 28.87 28.89 29.02 29.05
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 73 63 72 64 83 68 88 69 87
TEMP 70 71 66 65 70 70 66 66 80 78 69 70 85 81 71 71 84 80
DEWPT 67 67 66 65 70 69 66 66 71 71 68 69 71 70 68 68 70 69
RH 90 87100100100 97100100 74 79 97 97 63 69 90 90 63 69
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 B2 B2 B1 SC SC B1 SC SC SC SC SC SC SC SC
POP 12HR 40 60 70 30 30 10 20 20 20
RAIN SHWRS SC SC SC NM NM NM SC IS SC IS IS IS IS IS
TSTMS IS SC IS SC 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
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