
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
801 AM EDT Sun Aug 2 2026
NCZ003-022000-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
801 AM 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 80 69 81 68 80
TEMP 73 76 78 75 71 71 70 70 75 80 80 75 70 69 68 69 74 78 78 74
DEWPT 73 75 75 73 71 71 70 70 73 73 72 72 70 69 68 69 71 72 72 71
MAX/MIN RH 90 100 76 100 79
RH 100 97 91 94100100100100 94 79 77 90100100100100 90 82 82 90
WIND DIR S S S S S SW SW SW SW SW SW S S N NE NE E SE SE E
WIND SPD 5 6 5 5 4 3 3 3 3 5 4 2 2 2 3 4 4 4 3 2
CLOUDS OV B2 OV B2 B2 OV B2 B2 B1 SC B2 B1 B1 B1 B1 B1 B1 B2 B2 B2
CLOUDS(%) 90 86 95 70 76 89 84 86 65 48 83 63 57 59 66 64 62 83 83 75
VSBY 5 10 7 8 5 4 2 3 10 10 10 7 7 7 7 7 7 7 7 7
POP 12HR 90 60 50 40 70
RAIN SHWRS NM O O NM SC IS IS SC SC SC IS IS SC SC NM NM NM
TSTMS NM NM NM SC SC IS SC SC IS SC SC SC
MIX HGT 2 2 3 <1 <1 <1 <1 <1 2 4 4 <1 <1 <1 <1 <1 2 4 3 <1
T WIND DIR S S S S S S SW SW SW S S S S S SE S S S S S
T WIND SPD 11 13 16 9 8 10 9 9 9 8 10 9 8 9 6 8 11 11 12 8
DISPERSION PR VP VP VP VP VP VP VP VP
ADI 25 40 48 6 5 5 4 12 25 39 37 4 4 4 3 8 31 41 40 4
MAX LVORI 4 4 4 6 9 9 9 7 5 3 3 6 9 9 9 8 4 3 3 6
STABILITY C C C E E F F B B A C F F F F C C C B F
CEILING 300 2300 2100 1500 800 2700 2700 2700 500 1400
STA PRES 28.75 28.72 28.75 28.78 28.83 28.81 28.86 28.89 28.94 28.94
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 81 68 83 68 82 69 83
TEMP 68 69 78 76 70 70 81 77 70 70 80 76 70 70 81 77
DEWPT 68 69 73 72 70 70 74 72 70 70 74 73 70 70 74 73
RH 100100 85 87100100 79 85100100 82 90100100 79 87
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B1 B1 B2 SC SC B1 B2 SC B1 B1 B1 SC SC B1 B1
POP 12HR 60 60 20 60 30 50 20 50
RAIN SHWRS NM IS IS NM IS IS NM SC IS SC IS IS SC
TSTMS SC IS SC IS SC IS 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