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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 PM EDT Mon May 4 2026
NCZ001-050800-
RAWS 310142
36.40N 81.46W Elev. 4608 ft
401 PM EDT Mon May 4 2026
Date 05/04/26 Tue 05/05/26 Wed 05/06/26 Thu
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 49 66 53 66 54
TEMP 64 58 54 52 51 52 60 64 64 59 58 57 55 54 56 63 65 61 59 59 57 55
DEWPT 39 40 40 40 38 38 37 39 40 43 45 47 48 50 53 56 57 57 57 56 56 55
MIN/MAX RH 64 38 90 75 100
RH 40 51 59 63 61 59 42 40 41 55 62 69 77 86 90 78 75 87 93 90 96100
WIND DIR W SW SW SW SW SW S S S S S S S S SW SW SW W SW W W W
WIND SPD 11 10 12 13 12 10 13 18 18 19 18 20 19 18 17 14 13 13 13 13 13 13
WIND GUST 25 24
CLOUDS FW FW SC SC FW FW FW SC B1 B1 B1 B2 B2 B2 B2 OV OV OV OV OV OV OV
CLOUDS(%) 25 14 28 45 19 11 18 42 69 68 62 71 81 87 82 92 92 92 92 97 97 92
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 10 60 90 100
RAIN SHWRS NM NM NM NM O O O O O O O
TSTMS SC SC SC IS IS
MIX HGT 6 <1 <1 <1 <1 <1 3 5 5 2 <1 <1 <1 <1 2 2 2 <1
T WIND DIR SW S S SW SW SW S S S S S S S S SW SW W W
T WIND SPD 13 13 9 8 5 5 23 27 25 24 17 18 13 9 18 13 28 11
DISPERSION FR FR FR FR GD GD GD GD FR FR FR FR
ADI 62 9 6 5 4 6 80112 75 27 15 16 12 10 33 26 60 10
MAX LVORI 1 2 3 3 3 2 1 1 1 2 2 3 4 5 4 4 3 5
STABILITY C E E E E B C C D D D D D D D D D D
CEILING None None None 11200 300 300 300 400 1200
STA PRES 26.65 26.66 26.66 26.61 26.61 26.56 26.58 26.61
Date 05/07Fri 05/08/26Sat 05/09/26Sun 05/10/26Mon 05/11/26
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 58 37 57 43 61 47 65 51 65
TEMP 57 52 43 41 55 52 46 48 57 56 50 50 62 60 54 55 62 59
DEWPT 53 43 38 35 35 38 38 40 43 43 42 44 46 48 47 50 53 50
RH 86 71 82 79 47 59 73 74 59 62 74 80 56 64 77 83 72 72
WIND SPD 15> <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS OV B2 B1 B1 FW SC FW SC SC SC FW SC FW SC SC B1 B1 B2
POP 12HR 90 30 10 20 30 5 20 30 60
RAIN SHWRS O O SC IS IS IS SC IS IS SC SC NM
TSTMS IS SC IS 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