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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Fri May 1 2026
NCZ018-020800-
RAWS 311941
36.22N 81.63W Elev. 3254 ft
801 PM EDT Fri May 1 2026
Date 05/01/26 Sat 05/02/26 Sun 05/03/26 Mon
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 41 56 34 60 40
TEMP 47 44 42 41 48 53 54 47 41 37 36 39 48 55 57 51 44 42 43 47
DEWPT 39 38 36 32 28 27 28 29 29 29 29 29 28 28 28 30 30 30 31 34
MIN/MAX RH 82 35 75 32 65
RH 74 79 79 70 46 36 36 49 62 72 75 67 46 35 33 44 57 62 62 60
WIND DIR NW NW NW NW NW NW NW NW NW NW NW NW NW W W W W W W W
WIND SPD 3 5 5 5 6 9 11 8 5 3 4 4 8 8 9 4 3 2 3 3
WIND GUST 18
CLOUDS B2 B2 OV OV OV SC FW FW FW FW FW FW FW CL CL CL FW FW FW SC
CLOUDS(%) 75 85 92 88 89 48 24 12 12 11 13 14 7 4 3 3 10 15 17 34
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 30 5 0 5
RAIN SHWRS SC IS IS
MIX HGT <1 <1 <1 1 3 5 6 2 <1 <1 <1 2 4 5 5 <1
T WIND DIR NW NW NW NW N N NW NW NW NW NW NW NW W W W
T WIND SPD 4 5 5 14 18 19 21 19 14 14 16 17 12 11 13 11
DISPERSION VP PR PR PR PR VP VP VP VP VP VP
ADI 4 10 12 19 58114147 13 8 6 4 46 66 72 85 4
MAX LVORI 3 4 4 3 1 1 1 2 2 3 3 1 1 1 1 2
STABILITY E E E B B B B E F G G A B B B F
CEILING 10900 700 8700 None None None None None None
STA PRES 26.75 26.75 26.75 26.73 26.82 26.87 26.92 26.87
Date 05/04Tue 05/05/26Wed 05/06/26Thu 05/07/26Fri 05/08/26
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 69 46 70 52 71 52 64 41 60
TEMP 65 60 49 49 69 64 55 53 67 64 57 54 61 55 44 43 58 53
DEWPT 42 45 43 43 42 43 45 49 54 54 52 52 50 43 39 38 39 38
RH 43 58 80 80 37 46 69 86 63 70 83 93 67 64 82 82 49 57
WIND SPD <15 <15 <15 <15 <15 <15 15> <15 <15
AVG CLOUDS SC SC SC SC FW SC B1 B1 B1 B2 B2 B2 B2 B1 SC SC SC SC
POP 12HR 10 5 5 40 60 70 60 20 20
RAIN SHWRS SC SC NM NM NM NM SC IS IS IS
TSTMS SC IS IS
$$
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