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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 AM EDT Mon May 18 2026
NCZ003-190800-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
131 AM EDT Mon May 18 2026
Date 05/17/26 Mon 05/18/26 Tue 05/19/26 Wed
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 88 60 90 62
TEMP 66 63 67 80 86 87 81 72 67 62 67 82 87 89 83 72 67 63 68
DEWPT 60 61 62 62 62 59 59 57 57 57 59 60 56 55 56 55 55 54 56
MIN/MAX RH 94 39 85 32 73
RH 81 93 84 54 45 39 47 59 70 84 75 47 35 32 40 55 65 72 65
WIND DIR N N N S S S S SW N N N S S S S SW N N N
WIND SPD 0 0 0 2 5 5 3 1 0 0 0 4 8 8 3 1 0 0 0
WIND GUST 16 18 14 13
CLOUDS CL CL CL CL FW FW FW FW FW SC SC FW FW FW FW FW FW FW FW
CLOUDS(%) 4 3 2 4 13 6 18 19 21 28 33 18 16 20 25 22 23 15 19
VSBY 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
Obvis PF
MIX HGT <1 <1 <1 4 6 7 <1 <1 <1 <1 <1 3 7 8 <1
T WIND DIR SW W SW SW S S S SW W NW W W SW SW SW
T WIND SPD 4 2 3 8 12 13 12 5 2 2 2 9 11 10 10
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 2 1 3 38 87 98 6 3 1 1 2 37 83 82 5
MAX LVORI 4 6 5 1 1 1 2 3 3 5 4 1 1 1 2
STABILITY G G A A B B G G G G A A B B G
CEILING None None None None None None None None
STA PRES 28.32 28.38 28.33 28.36 28.35 28.36 28.28
Date 05/20Thu 05/21/26Fri 05/22/26Sat 05/23/26Sun 05/24/26
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 88 62 77 55 70 57 76 60 81
TEMP 86 80 67 65 74 71 60 57 66 68 60 59 72 72 64 62 77 74
DEWPT 62 67 63 62 66 62 56 55 61 61 58 58 67 67 62 62 68 69
RH 45 65 87 90 76 73 87 93 84 78 93 96 84 84 93100 74 84
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW B1 B1 B1 B2 OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B2
POP 12HR 50 50 80 80 70 70 70 60 80
RAIN SHWRS SC SC SC NM O O NM NM NM NM SC SC NM NM SC SC O
TSTMS SC SC IS SC IS SC IS SC 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