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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 AM EDT Sun Apr 19 2026
NCZ006-200800-
RAWS 310801
36.37N 79.29W Elev. 580 ft
131 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 58 67 41 66 35
TEMP 71 68 60 58 64 66 59 50 45 42 46 59 64 65 59 48 41 36 39
DEWPT 56 56 45 40 34 27 25 24 26 27 29 32 29 22 21 21 20 21 21
MIN/MAX RH 70 23 56 19 54
RH 59 65 58 51 32 23 27 36 47 55 51 36 27 19 23 34 42 54 48
WIND DIR SW W NW NW NW NW N NW SW SW W NW NW NW N N N NE NE
WIND SPD 3 5 12 10 8 9 4 2 2 2 3 6 9 9 5 3 2 2 2
WIND GUST 27 23 19 19
CLOUDS B1 B2 OV OV B1 SC CL CL FW CL FW FW SC FW FW CL CL CL CL
CLOUDS(%) 54 81 93 91 69 35 5 5 7 5 17 20 26 7 9 3 4 4 5
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 50 0 0 0
RAIN SHWRS IS
MIX HGT <1 <1 2 3 5 7 <1 <1 <1 <1 <1 7 7 8 <1
T WIND DIR SW SW NW N NW NW NW NW SW SW SW W NW NW N
T WIND SPD 8 8 28 14 20 20 9 4 3 3 4 16 10 18 13
DISPERSION VP PR VP VP VP VP PR VP VP VP
ADI 5 5 62 35 88151 4 2 2 2 4118 79153 6
MAX LVORI 3 3 1 1 1 1 2 2 2 3 2 1 1 1 2
STABILITY E E D D C B F G G G A B B B F
CEILING 8000 4400 None None None None None None
STA PRES 29.19 29.38 29.41 29.53 29.54 29.56 29.55
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 68 47 83 53 83 56 88 59 87
TEMP 64 63 53 53 81 76 60 57 81 76 62 59 85 79 66 63 85 77
DEWPT 25 30 31 34 39 41 46 49 49 48 49 50 47 47 50 52 52 54
RH 22 29 43 48 22 28 60 75 33 37 62 72 27 32 56 67 32 45
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS CL FW FW SC SC SC SC FW FW FW FW FW FW SC SC SC SC B1
POP 12HR 0 0 10 5 5 0 5 10 40
RAIN SHWRS IS SC
TSTMS 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
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