
A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >
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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1201 AM EDT Sun Aug 2 2026
VAZ012-030800-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
1201 AM EDT Sun Aug 2 2026
Date 08/01/26 Sun 08/02/26 Mon 08/03/26 Tue
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 65 81 63 80 62
TEMP 67 66 66 72 76 79 73 67 66 64 65 73 76 79 72 66 64 62 64
DEWPT 65 66 66 71 70 71 69 66 65 64 65 69 68 68 67 65 63 62 64
MIN/MAX RH 100 77 100 69 100
RH 93100100 97 82 77 87 97 97100100 87 76 69 84 97 97100100
WIND DIR S SE SE S S S S SW W W SW W SW W N N N E E
WIND SPD 4 3 3 3 4 3 2 1 1 1 1 1 2 1 1 0 0 1 1
WIND GUST 14
CLOUDS OV B2 B2 OV B2 B1 B1 B1 B1 B1 B1 SC B1 B2 B1 B1 B1 B1 B2
CLOUDS(%) 88 85 87 89 70 69 66 56 58 66 61 45 52 86 64 58 54 61 71
VSBY 7 7 6 7 6 6 6 1 1 1 1 10 7 6 6 7 10 10 6
POP 12HR 50 70 50 60 50
RAIN SHWRS IS SC SC IS SC SC SC IS SC NM SC IS SC
TSTMS IS IS SC SC SC IS SC SC IS
Obvis PF PF PF PF
MIX HGT <1 <1 1 2 3 3 1 <1 <1 <1 <1 2 4 3 <1
T WIND DIR S S S S S S S SW SW SW SW W SW SW SW
T WIND SPD 18 9 13 20 18 20 19 19 3 3 5 11 10 5 2
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 12 4 20 48 58 69 9 9 2 2 6 35 49 21 1
MAX LVORI 5 9 5 4 4 3 5 8 10 10 9 4 3 3 6
STABILITY E F B B C B F F F F A A B B F
CEILING 700 700 600 700 2700 None 2400 None
STA PRES 27.07 27.07 27.05 27.10 27.12 27.17 27.18
Date 08/04Wed 08/05/26Thu 08/06/26Fri 08/07/26Sat 08/08/26
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 79 63 82 63 84 64 84 64 84
TEMP 76 70 64 64 77 74 65 65 79 74 65 66 80 74 65 65 80 74
DEWPT 67 66 63 64 68 68 64 65 67 68 64 65 68 68 65 65 68 68
RH 74 87 97100 74 82 97100 67 82 97 97 67 82100100 67 82
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B2 B1 B1 B1 B2 SC SC SC B2 SC SC SC B2 SC SC SC B2
POP 12HR 70 10 70 10 60 10 60 20 60
RAIN SHWRS SC NM SC NM NM IS NM IS IS NM
TSTMS IS SC IS SC SC 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