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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
331 AM EDT Sun May 17 2026
VAZ018-172000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
331 AM EDT Sun May 17 2026
Date Sun 05/17/26 Mon 05/18/26 Tue 05/19/26
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 90 64 92 66 93
TEMP 61 65 81 88 87 77 71 67 65 69 84 90 90 80 74 69 66 70 85 90 92 84
DEWPT 54 58 61 58 60 62 59 56 56 60 62 58 57 57 55 54 54 58 59 55 54 54
MAX/MIN RH 37 74 32 69 27
RH 78 78 51 36 40 60 66 68 73 73 48 34 33 45 51 59 65 66 41 31 28 36
WIND DIR W W W SW SW SW W W W W S S S S SW SW SW W SW SW S S
WIND SPD 1 1 1 3 3 1 2 2 2 1 2 5 6 4 4 3 2 1 3 4 6 3
WIND GUST 16 20 18 17 16 12 14 19 17
CLOUDS SC FW FW FW SC FW FW CL CL FW CL FW FW FW FW FW FW FW FW SC SC SC
CLOUDS(%) 46 23 8 15 39 17 6 5 4 10 2 20 13 22 23 20 17 14 13 26 27 34
VSBY 6 10 10 10 10 10 10 10 5 10 10 10 10 10 10 10 10 10 9 10 10 10
POP 12HR 10 5 5 0 5
MIX HGT <1 <1 4 7 5 <1 <1 <1 <1 <1 5 7 7 <1 <1 <1 <1 <1 5 8 9 <1
T WIND DIR W W W SW S SW SW SW W W W S S S SW SW W W W SW W W
T WIND SPD 3 3 6 6 11 6 3 4 3 3 4 5 9 8 6 5 3 4 9 8 10 2
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 2 3 33 55 78 3 2 2 2 3 26 50 71 4 3 3 2 4 55 79 92 1
MAX LVORI 4 4 1 1 1 3 3 3 3 3 2 1 1 2 2 3 3 3 1 1 1 2
STABILITY F A A A A G G G G A A A B F F G G A A A B G
CEILING None None None None None None None None None None
STA PRES 27.94 27.89 27.94 27.98 28.02 27.98 28.00 28.00 28.02 27.95
Date Wed 05/20/26Thu 05/21/26Fri 05/22/26Sat 05/23/26
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 67 89 64 75 57 69 57 73
TEMP 70 71 88 77 68 66 73 68 61 58 67 63 60 59 70 67
DEWPT 52 57 60 61 59 60 60 56 51 51 55 54 53 54 61 59
RH 53 61 39 58 73 81 64 65 70 77 65 72 78 83 73 75
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW SC B2 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR 5 70 50 70 60 70 60 70
RAIN SHWRS NM SC SC NM NM NM SC NM NM NM SC SC NM
TSTMS SC 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