Print This Forecast (Printer-Friendly)
EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Tue May 19 2026
VAZ018-192000-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
801 AM EDT Tue May 19 2026
Date Tue 05/19/26 Wed 05/20/26 Thu 05/21/26
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 93 68 91 66 75
TEMP 85 91 91 81 75 72 68 72 85 90 86 76 71 67 66 67 71 73 70 63
DEWPT 60 56 56 57 54 52 52 57 61 59 60 62 62 61 61 62 64 64 63 57
MAX/MIN RH 30 62 35 85 72
RH 43 31 31 44 48 49 57 59 45 35 42 62 73 81 84 84 79 73 78 81
WIND DIR W W SW SW W W W W W W W NW NW N N NE E E E E
WIND SPD 2 3 4 2 3 3 3 2 5 5 5 3 2 0 0 1 3 4 3 4
WIND GUST 12 12 14 16 13 12 18 16 17 16 17
CLOUDS SC SC B1 B1 SC B1 FW FW FW B1 B1 B1 B1 B2 B2 OV OV OV OV OV
CLOUDS(%) 36 39 51 66 42 52 22 11 19 57 57 64 64 73 76 98 98 94 94 94
VSBY 10 10 10 10 10 10 10 10 10 10 10 7 6 2 0 2 9 9 9 10
POP 12HR 5 5 40 60 100
RAIN SHWRS SC SC SC SC NM NM O O O O O
TSTMS SC SC IS IS SC IS IS
MIX HGT 4 8 7 <1 <1 <1 <1 <1 5 8 4 <1 <1 <1 <1 <1 2 2 2 1
T WIND DIR W SW SW SW SW SW W W W W NW NW NW N NW NW E E E E
T WIND SPD 9 11 11 3 5 4 6 10 20 11 10 10 6 4 3 3 3 9 8 5
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 51104 54 2 3 2 3 11127 56 40 5 3 2 2 5 7 20 17 4
MAX LVORI 1 1 1 2 2 2 3 2 1 1 1 3 3 5 5 5 4 3 3 4
STABILITY A A C F F F G A A C C F F F F B B C B E
CEILING None 4700 None None None 4000 800 100 100 100
STA PRES 27.98 27.93 27.91 27.91 27.90 27.85 27.88 27.89 27.93 27.95
Date Fri 05/22/26Sat 05/23/26Sun 05/24/26Mon 05/25/26
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 56 66 57 72 62 79 63 79
TEMP 59 57 64 62 61 60 70 69 65 66 78 73 66 66 77 73
DEWPT 52 53 57 54 54 57 63 62 59 61 65 63 60 61 65 63
RH 78 86 78 75 78 90 78 78 81 84 64 71 81 84 67 71
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS OV B2 B2 B2 B2 B2 B2 OV B1 B1 B2 B2 B1 B1 B2 B2
POP 12HR 90 70 60 80 50 80 50 70
RAIN SHWRS O O NM SC NM SC SC O SC IS SC O SC SC NM
TSTMS IS IS IS SC SC IS 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