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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 PM EDT Tue Jul 21 2026
NCZ001-220800-
RAWS 310141
36.40N 81.29W Elev. 3009 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 64 75 59 68 56
TEMP 76 74 73 69 67 66 70 73 74 71 67 65 62 61 65 66 68 65 61 59 57 59
DEWPT 69 67 67 67 66 66 68 68 68 67 65 63 61 61 62 63 63 61 60 59 57 58
MIN/MAX RH 100 80 100 85 100
RH 79 79 81 93 97100 93 84 82 87 93 93 97100 90 90 84 87 97100100 96
WIND DIR SW SW SW SW W W W SW W W N N N N E E SE E E E E E
WIND SPD 10 8 6 5 5 4 5 5 5 3 2 2 2 2 4 4 5 4 2 1 1 2
CLOUDS B2 B2 B2 B2 OV OV B2 OV B2 B2 B2 B2 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2
CLOUDS(%) 77 80 80 82 92 92 78 92 75 79 72 73 68 65 78 75 75 70 71 74 78 77
VSBY 3 6 7 5 3 3 3 3 5 6 7 7 7 6 6 6 6 7 7 7 7
POP 12HR 70 70 40 60 40
RAIN SHWRS NM SC SC SC NM NM NM NM SC SC SC IS SC SC SC NM NM SC SC SC SC SC
TSTMS NM SC SC SC SC SC SC SC SC SC IS IS IS
MIX HGT 3 1 <1 <1 <1 <1 2 2 2 <1 <1 <1 <1 1 2 2 2 2
T WIND DIR SW W SW SW SW W SW SW W NW N NW N N NE E E E
T WIND SPD 10 2 6 6 9 9 9 6 3 1 2 4 12 10 10 5 6 4
DISPERSION PR PR PR PR VP VP VP VP VP VP VP VP
ADI 32 2 5 5 6 7 22 20 9 1 1 2 6 14 23 15 19 3
MAX LVORI 3 5 5 6 6 8 5 4 4 6 7 8 9 5 4 5 4 6
STABILITY C D E E E C C C C F F F F B C C C E
CEILING 1400 200 1100 800 700 800 1100 500 500
STA PRES 27.11 27.09 27.17 27.17 27.16 27.20 27.29 27.30
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 67 58 67 60 78 62 80 62 79
TEMP 66 65 63 61 66 66 63 63 75 74 66 65 79 76 67 65 77 74
DEWPT 63 62 62 61 66 65 63 63 65 66 64 64 65 65 63 63 64 64
RH 90 90 97100100 97100100 71 76 93 97 62 69 87 93 64 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B2 B2 B2 B1 SC SC B1 FW SC SC SC B1 SC SC B1
POP 12HR 50 80 70 30 30 10 20 30 30
RAIN SHWRS SC SC NM O NM NM SC IS SC IS SC IS IS SC
TSTMS SC IS 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