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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
401 AM EDT Fri May 15 2026
NCZ005-152000-
RAWS 310540
36.38N 79.70W Elev. 858 ft
401 AM EDT Fri May 15 2026
Date Fri 05/15/26 Sat 05/16/26 Sun 05/17/26
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 76 52 85 62 91
TEMP 45 50 64 73 76 70 59 56 53 58 74 82 84 78 69 65 62 65 79 89 90 84
DEWPT 38 39 38 39 40 44 42 42 42 45 49 50 51 52 52 52 53 57 59 57 56 59
MAX/MIN RH 27 67 31 76 31
RH 76 66 38 29 27 39 53 59 66 62 41 33 32 40 55 63 72 75 50 34 32 43
WIND DIR W NW NW W W SW SW SW SW SW SW SW SW SW S SW SW SW SW SW S S
WIND SPD 4 4 5 4 3 1 2 2 3 4 8 10 10 4 5 5 6 6 5 5 6 3
CLOUDS CL CL CL CL FW FW SC FW FW FW FW FW FW SC SC SC SC SC SC SC FW FW
CLOUDS(%) 4 1 2 3 8 25 37 9 22 21 11 19 23 49 30 33 49 48 31 33 19 17
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 5 0 0 0
MIX HGT <1 <1 5 6 6 <1 <1 <1 <1 <1 4 6 6 <1 <1 <1 <1 <1 3 7 7 <1
T WIND DIR W NW N NW W S S S S SW SW SW SW SW SW SW SW SW W S S S
T WIND SPD 4 8 14 12 6 2 3 3 3 4 16 16 14 5 4 6 4 9 8 8 10 5
DISPERSION VP VP VP VP VP VP PR PR PR VP
ADI 2 9 88 95 53 1 2 2 2 4 70102100 4 2 3 3 11 34 64 81 3
MAX LVORI 4 3 1 1 1 2 2 3 3 3 1 1 1 2 3 3 3 3 1 1 1 2
STABILITY F A A A A G G G G A B B B E F F E B A A B G
CEILING None None None None None None None None None None
STA PRES 29.36 29.31 29.37 29.41 29.44 29.37 29.39 29.42 29.46 29.44
Date Mon 05/18/26Tue 05/19/26Wed 05/20/26Thu 05/21/26
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 65 92 64 92 67 92 66 85
TEMP 69 69 92 86 70 68 90 85 72 70 91 84 72 69 83 76
DEWPT 60 62 59 57 60 62 56 54 59 62 57 58 62 63 60 60
RH 73 78 33 37 71 81 32 35 64 76 32 41 71 81 46 58
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW CL CL CL CL CL FW FW FW FW SC B1 SC B1 B2
POP 12HR 5 5 5 0 0 20 30 60
RAIN SHWRS IS SC IS SC NM
TSTMS 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