Print This Forecast (Printer-Friendly)
EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Mon May 18 2026
VAZ018-190800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
801 PM EDT Mon May 18 2026
Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu
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 64 88 66 88 64
TEMP 71 67 64 67 81 88 88 82 75 71 67 71 84 87 83 75 70 67 65 67
DEWPT 56 55 55 58 59 56 55 57 54 52 52 57 61 60 62 63 63 61 61 62
MIN/MAX RH 77 32 62 40 87
RH 59 65 73 73 47 34 33 43 48 51 59 61 46 40 49 66 78 81 87 84
WIND DIR SW SW W W W SW W SW SW W W W W W W NW W N N E
WIND SPD 8 8 4 4 3 6 6 3 5 3 3 2 5 5 5 3 2 0 0 1
WIND GUST 18 18 13 14 16 16 13 12 18 17 16 16
CLOUDS FW SC SC FW SC SC B1 B1 SC SC FW FW FW B2 B2 B1 B1 B2 B2 OV
CLOUDS(%) 14 36 36 25 46 49 54 66 37 46 23 13 10 74 74 66 59 81 81 95
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 7 6 2 0 2
POP 12HR 0 5 0 60 80
RAIN SHWRS SC NM SC SC SC NM O
TSTMS SC SC IS
MIX HGT <1 <1 <1 <1 5 8 8 <1 <1 <1 <1 <1 5 8 3 <1
T WIND DIR SW SW SW W W SW SW S SW SW W W W W NW NW
T WIND SPD 6 5 4 4 10 11 11 2 5 6 6 16 21 14 13 11
DISPERSION PR PR VP VP PR VP VP VP VP VP VP
ADI 3 3 2 4 59106107 1 3 3 3 19135 73 57 5
MAX LVORI 2 2 3 3 1 1 1 2 2 2 3 2 1 1 1 3
STABILITY F F G A A A A F G F G A A C B F
CEILING None None None 23000 None None None 9500 6600
STA PRES 28.00 27.99 28.01 27.93 27.92 27.91 27.90 27.88
Date 05/21Fri 05/22/26Sat 05/23/26Sun 05/24/26Mon 05/25/26
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 73 55 66 57 74 62 80 64 80
TEMP 72 63 58 57 63 62 59 59 72 69 65 65 77 72 66 66 78 73
DEWPT 62 56 51 51 54 54 53 55 63 62 59 61 65 65 61 62 65 64
RH 71 78 77 80 72 75 80 87 73 78 81 87 67 79 84 87 64 73
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B2
POP 12HR 90 80 80 60 80 60 70 50 70
RAIN SHWRS O O NM O O NM NM SC NM O NM SC SC NM SC IS SC NM
TSTMS IS SC SC SC IS 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