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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
501 AM EDT Sun Jul 19 2026
NCZ001-192000-
RAWS 310142
36.40N 81.46W Elev. 4608 ft
501 AM EDT Sun Jul 19 2026
Date Sun 07/19/26 Mon 07/20/26 Tue 07/21/26
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 75 63 74 65 76
TEMP 66 67 72 71 67 66 65 65 64 67 70 70 67 67 66 66 66 68 71 72 69
DEWPT 64 64 65 65 65 64 63 63 63 64 65 65 65 64 63 63 64 65 66 66 65
MAX/MIN RH 77 94 84 94 80
RH 93 90 79 81 93 93 93 93 97 90 84 84 93 90 90 90 93 90 84 81 87
WIND DIR W W W W NW NW NW NW SW S S S SW S SW W W W SW SW SW
WIND SPD 13 9 8 8 8 6 5 3 3 3 4 4 4 5 6 8 8 9 9 9 11
CLOUDS B2 B2 B1 B1 B1 FW SC B1 B1 B1 B2 B1 B2 B1 SC B1 B1 B1 B2 B2 B2
CLOUDS(%) 72 72 61 55 51 16 36 60 63 61 79 65 77 60 49 54 61 61 76 76 73
VSBY 10 10 10 10 10 10 5 2 3 10 10 10 10 10 3 10 10 10 10 10 10
POP 12HR 40 20 70 40 60
RAIN SHWRS SC SC IS IS NM SC SC SC SC SC NM NM NM
TSTMS SC SC IS SC SC SC IS IS SC SC SC
Obvis PF
MIX HGT 1 2 3 3 <1 <1 <1 <1 <1 3 3 2 <1 <1 <1 <1 <1 3 3 3 <1
T WIND DIR NW NW W W W NW NW NW NW S SW SW S S SW W SW SW SW S S
T WIND SPD 12 11 9 5 6 3 3 3 1 3 8 4 6 3 2 5 4 13 17 19 8
DISPERSION PR PR PR VP VP PR PR PR FR
ADI 18 29 29 20 6 2 2 2 1 11 24 13 5 2 2 5 5 45 55 64 7
MAX LVORI 5 4 3 3 5 7 7 7 7 5 4 4 6 6 7 6 6 4 4 3 5
STABILITY D C C B D F F F B B C C E E E D C C C C D
CEILING 8900 None None 5200 500 500 500 None 500 400
STA PRES 26.72 26.68 26.70 26.69 26.71 26.69 26.67 26.66 26.67 26.61
Date Wed 07/22/26Thu 07/23/26Fri 07/24/26Sat 07/25/26
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 65 74 59 71 58 70 60 71
TEMP 67 65 70 67 62 59 68 65 60 58 67 64 61 60 69 66
DEWPT 64 63 64 62 60 57 58 57 56 56 59 59 59 58 61 61
RH 90 93 81 84 93 93 70 75 87 93 75 84 93 93 76 84
WIND SPD 15> <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B2 B1 SC SC SC B1 SC SC B1 B1 B1 B1 B1 B1
POP 12HR 70 60 20 30 20 30 30 50
RAIN SHWRS NM NM NM SC IS SC IS IS SC IS SC SC SC
TSTMS SC IS SC IS IS 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
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