Print This Forecast (Printer-Friendly)
EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 AM EDT Sun Apr 19 2026
VAZ018-200800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
231 AM EDT Sun Apr 19 2026
Date 04/18/26 Sun 04/19/26 Mon 04/20/26 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 46 59 40 56 33
TEMP 48 46 50 56 58 49 45 44 41 40 48 54 55 47 39 35 33 36
DEWPT 42 36 32 23 20 19 21 25 28 27 25 21 19 17 18 17 17 19
MIN/MAX RH 84 23 60 23 53
RH 80 68 50 27 23 30 38 47 59 59 40 27 24 30 42 47 51 50
WIND DIR NW NW NW NW NW NW W W NW NW NW NW NW NW NW W W W
WIND SPD 16 18 14 13 11 6 4 5 6 8 10 10 9 5 2 1 1 1
WIND GUST 41 46 41 36 32 24 20 19 23 27 29 28 26 20
CLOUDS B2 OV SC FW CL CL FW FW SC SC FW FW CL CL CL CL FW CL
CLOUDS(%) 81 88 45 20 4 5 7 22 32 30 15 7 3 4 4 5 7 4
VSBY 10 10 10 10 10 10 10 10 10 10 10 9 9 9 9 9 9
POP 12HR 80 20 5 0 0
RAIN SHWRS NM IS
TSTMS
MIX HGT 1 2 3 5 5 2 <1 <1 <1 3 5 7 7 2
T WIND DIR NW NW NW NW NW NW W W W NW NW NW NW NW
T WIND SPD 33 34 35 32 31 20 4 5 5 12 14 20 19 13
DISPERSION GD PR VP PR PR PR VP VP VP
ADI 30 69 90133130 14 2 3 4 44 83153144 6
MAX LVORI 3 1 1 1 1 2 2 2 3 1 1 1 1 2
STABILITY D D D C C E F F E B B B B F
CEILING 1300 None None None None None None None
STA PRES 27.67 27.75 27.80 27.87 27.88 27.94 27.93
Date 04/21Wed 04/22/26Thu 04/23/26Fri 04/24/26Sat 04/25/26
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 70 49 76 53 81 54 83 58 78
TEMP 66 61 53 55 74 67 55 55 79 70 56 57 81 72 61 60 75 68
DEWPT 29 34 36 40 45 41 45 47 45 43 44 46 47 47 46 49 52 51
RH 25 36 52 57 35 39 69 74 30 38 64 67 30 41 58 67 45 54
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW SC SC SC FW FW FW FW FW FW FW SC SC B1 B1 B2
POP 12HR 0 5 20 10 10 5 10 30 60
RAIN SHWRS IS IS SC SC NM
TSTMS 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
Radar
Current Weather
Rivers & Lakes
Satellite
Forecast Maps
Hour by Hour Forecast
Graphical Hazards
Winter Weather
Weather Briefing Page
Forecast Discussion
Text Products
Climate Plots
Submit A Storm Report
Fire Weather
Drought
Recreation Forecast
NOAA Weather Radio
Aviation
Follow us on X
Follow us on Facebook
Follow us on YouTube
RNK RSS Feed