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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Sat May 16 2026
NCZ005-170800-
RAWS 310540
36.38N 79.70W Elev. 858 ft
801 PM EDT Sat May 16 2026
Date 05/16/26 Sun 05/17/26 Mon 05/18/26 Tue
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 62 91 65 91 66
TEMP 69 65 62 66 80 89 89 81 72 70 66 69 82 90 91 85 74 70 66 69
DEWPT 52 53 55 59 61 59 60 62 62 62 62 64 65 61 59 60 60 60 61 63
MIN/MAX RH 79 35 88 35 87
RH 55 65 78 78 52 37 38 53 71 76 87 84 56 38 34 43 62 71 84 81
WIND DIR SW SW SW SW SW SW S S S S SW SW SW S S S S S SW SW
WIND SPD 5 5 5 5 5 4 5 3 4 4 4 4 5 8 9 4 5 6 5 5
CLOUDS SC B1 SC FW FW CL FW FW FW FW FW FW FW FW CL FW FW FW SC FW
CLOUDS(%) 48 52 44 24 8 5 6 25 8 6 17 19 16 8 5 9 11 10 26 17
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 0 0
MIX HGT <1 <1 <1 <1 3 6 7 <1 <1 <1 <1 1 4 6 8 <1
T WIND DIR SW S SW SW W S SW S S S S SW SW SW SW S
T WIND SPD 5 4 4 5 6 8 10 10 4 3 4 13 11 10 11 8
DISPERSION PR PR PR VP VP VP VP VP PR PR PR
ADI 4 3 3 6 27 62 91 5 2 2 2 18 58 73 92 4
MAX LVORI 3 3 4 4 2 1 1 2 3 4 6 4 1 1 1 2
STABILITY E E E A A A A G F F F A A B B F
CEILING None None None None None None None None None
STA PRES 29.33 29.37 29.42 29.38 29.43 29.48 29.52 29.47
Date 05/19Wed 05/20/26Thu 05/21/26Fri 05/22/26Sat 05/23/26
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 92 67 92 66 82 56 68 55 73
TEMP 90 86 72 71 92 84 72 70 80 72 62 59 65 65 59 58 69 69
DEWPT 57 56 59 63 58 62 64 66 63 62 60 58 60 59 59 58 62 62
RH 33 36 64 76 32 48 76 87 56 71 93 96 84 81100100 78 78
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW FW B1 B1 SC B1 B2 B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR 0 0 30 40 80 80 70 70 50
RAIN SHWRS SC SC IS SC O O NM NM NM NM NM SC SC
TSTMS SC IS IS SC 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