
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
131 PM EDT Sun Aug 2 2026
VAZ046-022000-
RAWS 441101
37.39N 78.80W Elev. 804 ft
131 PM EDT Sun Aug 2 2026
Date Sun 08/02/26 Mon 08/03/26 Tue 08/04/26
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 83 70 86 68 82
TEMP 80 81 76 73 73 72 72 79 85 84 77 72 71 69 69 77 81 80 76
DEWPT 73 73 74 73 72 72 72 75 74 73 75 72 71 69 69 71 72 72 72
MAX/MIN RH 86 100 72 100 73
RH 79 77 94100 97100100 88 70 70 94100100100100 82 74 77 87
WIND DIR S S S S S S SW SW SW S SE NE NE NE NE NE NE E E
WIND SPD 8 8 6 5 6 5 5 5 5 5 3 2 2 4 5 6 5 5 3
WIND GUST 17 16 17
CLOUDS B1 B2 B2 OV OV OV B2 B2 B1 B1 B1 B2 B1 B2 B2 B2 B2 B2 B1
CLOUDS(%) 67 75 72 91 89 91 87 70 65 55 56 76 55 77 81 70 76 79 67
VSBY 9 10 10 6 6 5 3 10 10 10 10 5 10 10 10 10 6 6 6
POP 12HR 70 80 40 60 40
RAIN SHWRS SC SC O NM SC SC SC SC SC SC SC
TSTMS SC SC SC SC SC SC IS SC SC SC
MIX HGT 3 2 <1 <1 <1 <1 1 3 4 4 <1 <1 <1 <1 <1 2 3 3 <1
T WIND DIR S S S S S S S SW SW W NE NE N NE NE NE NE NE NE
T WIND SPD 20 16 11 13 10 9 9 11 8 5 4 3 3 17 14 11 6 5 5
DISPERSION PR PR PR PR VP VP VP VP VP
ADI 61 44 8 9 7 6 14 33 30 21 2 2 2 12 15 29 21 19 3
MAX LVORI 4 4 8 8 8 8 5 4 3 3 6 10 10 7 5 4 3 3 6
STABILITY C C E E E E C C C C F F F E C C C C F
CEILING 2100 2000 100 600 None 3800 3000 2200 1900
STA PRES 29.07 29.08 29.08 29.11 29.11 29.19 29.25 29.32 29.31
Date Wed 08/05/26Thu 08/06/26Fri 08/07/26Sat 08/08/26
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 67 84 69 87 70 87 70 88
TEMP 69 70 83 77 71 72 86 79 72 72 87 79 72 72 87 78
DEWPT 69 70 75 75 71 72 77 75 72 72 76 75 72 72 76 75
RH 100100 77 94100100 75 88100100 70 88100100 70 91
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B1 B2 B1 B1 B1 B1 SC SC SC B1 SC SC SC B1
POP 12HR 50 60 20 30 10 30 20 40
RAIN SHWRS SC SC SC NM IS SC SC IS SC
TSTMS SC IS SC IS SC SC 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