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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Fri Apr 17 2026
NCZ006-172000-
RAWS 310801
36.37N 79.29W Elev. 580 ft
801 AM EDT Fri Apr 17 2026
Date Fri 04/17/26 Sat 04/18/26 Sun 04/19/26
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 87 59 92 64 65
TEMP 79 86 87 80 68 65 60 61 82 90 92 83 76 73 66 64 64 62 63 58
DEWPT 55 50 49 50 50 49 50 52 55 54 53 54 54 55 54 51 46 39 33 28
MAX/MIN RH 27 73 27 65 31
RH 44 29 27 35 52 56 69 72 40 30 27 37 46 53 65 63 52 43 32 32
WIND DIR NW NW NW NW SW N N N S SW SW S S SW SW NW NW NW NW NW
WIND SPD 4 5 5 1 1 0 0 0 2 6 8 4 5 5 5 9 10 10 9 5
WIND GUST 16 19 24 19
CLOUDS SC CL FW FW FW FW SC FW SC SC SC B1 B1 B2 B2 OV OV B2 B1 SC
CLOUDS(%) 40 3 9 17 8 19 45 20 28 42 35 51 55 74 78 91 88 85 66 26
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 20 60
RAIN SHWRS IS IS NM NM SC SC
MIX HGT 5 8 8 <1 <1 <1 <1 <1 4 8 8 <1 <1 <1 <1 2 3 3 7 <1
T WIND DIR NW NW NW N S W NW SE SW SW SW S S S SW W NW NW NW NW
T WIND SPD 16 13 12 2 2 2 1 1 11 14 17 8 6 8 9 19 28 11 24 10
DISPERSION VP VP VP VP VP PR PR PR PR
ADI 105135124 1 1 1 1 1 62125147 5 5 5 6 53 93 39184 5
MAX LVORI 1 1 1 2 2 3 4 3 1 1 1 2 2 2 3 3 1 1 1 2
STABILITY A A A G G G F A A B B E E E E C C C B F
CEILING None None None None None None 6000 14700 2100 18900
STA PRES 29.37 29.33 29.35 29.35 29.35 29.25 29.21 29.18 29.36 29.40
Date Mon 04/20/26Tue 04/21/26Wed 04/22/26Thu 04/23/26
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 42 68 37 72 50 82 54 84
TEMP 45 44 65 61 44 41 68 66 55 54 80 75 61 58 82 77
DEWPT 26 27 25 23 26 25 28 31 33 35 39 39 41 47 47 47
RH 47 51 22 23 49 52 22 27 43 48 23 27 48 67 29 35
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW CL FW FW FW FW FW FW FW SC SC SC SC FW FW FW
POP 12HR 10 0 0 0 0 5 5 10
$$
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