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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
201 PM EDT Mon Apr 20 2026
NCZ006-210800-
RAWS 310801
36.37N 79.29W Elev. 580 ft
201 PM EDT Mon Apr 20 2026
Date 04/20/26 Tue 04/21/26 Wed 04/22/26 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 30 71 47 85 52
TEMP 66 55 46 40 35 37 53 65 70 62 55 53 51 52 73 82 84 74 63 57 54 57
DEWPT 30 23 21 21 21 22 24 25 28 31 32 32 34 38 44 43 42 43 44 45 44 46
MIN/MAX RH 67 20 60 23 71
RH 26 29 37 46 56 54 32 22 21 31 41 44 52 59 35 25 23 33 50 64 69 67
WIND DIR NW N N NE NE NE E SW SW S S SW SW SW SW W W NW W W W W
WIND SPD 12 6 3 2 1 2 2 3 5 4 4 4 5 5 9 11 9 4 2 1 2 2
CLOUDS FW FW CL FW CL FW FW FW FW SC SC SC SC FW FW FW FW SC SC FW FW FW
CLOUDS(%) 18 6 4 7 5 6 6 8 15 31 50 46 37 25 23 16 20 33 33 17 11 8
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 10 5
MIX HGT 8 <1 <1 <1 <1 <1 4 5 5 <1 <1 <1 <1 <1 3 9 11 <1
T WIND DIR NW N N NE NE E S SW SW S S S SW SW W W W W
T WIND SPD 19 8 8 4 3 5 1 6 12 6 5 8 8 9 28 26 23 14
DISPERSION PR VP VP VP VP VP VP PR VP VP VP VP
ADI 96 4 4 2 2 6 5 41 74 3 4 5 4 9111139200 7
MAX LVORI 1 2 2 2 3 3 2 1 1 2 2 2 2 2 1 1 1 2
STABILITY C F G G G A A A A F E E F A B C B F
CEILING None None None None None None None None None None
STA PRES 29.56 29.64 29.71 29.74 29.59 29.53 29.48 29.43 29.38
Date 04/23Fri 04/24/26Sat 04/25/26Sun 04/26/26Mon 04/27/26
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 87 55 87 60 85 57 80 54 75
TEMP 84 76 63 60 85 79 64 63 84 74 64 58 78 74 60 57 72 71
DEWPT 47 48 47 50 48 47 48 51 53 56 56 56 54 52 54 53 56 56
RH 28 37 56 69 28 32 56 65 34 53 75 93 43 46 81 86 57 59
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC SC FW FW SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B2 B2
POP 12HR 5 5 5 5 40 50 50 40 40
RAIN SHWRS SC SC SC SC SC SC SC SC 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