
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
1231 PM EDT Sat Aug 1 2026
NCZ003-012000-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
1231 PM EDT Sat Aug 1 2026
Date Sat 08/01/26 Sun 08/02/26 Mon 08/03/26
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 82 69 78 69 81
TEMP 80 80 74 71 70 70 70 73 75 77 74 71 71 71 71 74 79 80 76
DEWPT 69 69 71 70 70 70 70 73 75 75 73 71 71 71 71 73 74 74 72
MAX/MIN RH 66 100 94 100 82
RH 69 69 90 97100100100100100 94 97100100100100 97 85 82 87
WIND DIR S S SE SE S SE SE S S S S S S S S S S S S
WIND SPD 6 6 3 6 8 6 5 5 5 5 4 4 4 4 3 4 5 4 3
CLOUDS OV OV OV B2 OV OV OV OV B2 OV B1 B2 B2 B2 B2 B1 B2 B2 B1
CLOUDS(%) 92 89 89 83 92 97 90 89 82 90 65 84 70 87 73 66 71 71 57
VSBY 10 10 7 10 10 7 4 5 7 5 7 4 7 7 7 7 7 7 7
POP 12HR 60 80 90 90 60
RAIN SHWRS IS NM O NM NM NM NM SC NM O SC O SC IS NM NM SC
TSTMS IS SC SC IS IS IS IS NM NM SC SC IS SC SC SC
MIX HGT 4 2 <1 <1 <1 <1 <1 2 3 2 <1 <1 <1 <1 <1 2 4 4 <1
T WIND DIR S S S SE S S SE S S S S S S S SW SW SW SW S
T WIND SPD 12 13 12 12 14 9 6 8 14 12 9 9 6 4 9 12 14 13 10
DISPERSION VP PR PR PR VP VP VP VP VP
ADI 46 33 6 8 13 6 5 18 44 29 6 6 5 3 11 30 53 51 5
MAX LVORI 1 3 6 6 5 8 9 5 4 4 6 8 9 9 7 4 4 3 6
STABILITY C C F E D E C C C C E E E E B C C C F
CEILING 2400 1200 300 300 1500 1100 300 800 2700
STA PRES 28.80 28.77 28.78 28.77 28.73 28.76 28.79 28.84 28.83
Date Tue 08/04/26Wed 08/05/26Thu 08/06/26Fri 08/07/26
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 80 67 80 68 81 68 83
TEMP 69 69 78 75 69 69 79 74 70 70 81 75 70 70 80 77
DEWPT 69 69 73 72 69 69 74 73 70 70 74 73 70 70 74 73
RH 100100 85 90100100 85 97100100 79 94100100 82 87
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 B1 B2 B1 B1 B1 B2 B1 B1 SC B2 SC SC SC B1
POP 12HR 40 80 40 70 30 60 20 40
RAIN SHWRS SC IS O SC IS NM SC NM IS SC
TSTMS SC IS SC SC 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