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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 AM EDT Thu Apr 30 2026
VAZ046-010800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
131 AM EDT Thu Apr 30 2026
Date 04/29/26 Thu 04/30/26 Fri 05/01/26 Sat
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 53 69 41 69 47
TEMP 58 54 55 63 68 67 60 51 46 42 45 59 66 69 63 55 51 47 48
DEWPT 54 51 50 46 42 39 37 36 36 35 36 37 37 37 39 40 42 42 43
MIN/MAX RH 95 35 78 31 83
RH 86 90 83 54 39 36 42 56 68 76 70 44 34 31 41 57 71 83 83
WIND DIR W W W NW NW NW NW NW NW NW NW SW SW SW S N N NE NE
WIND SPD 6 5 8 10 11 13 6 5 3 2 2 5 8 8 4 3 3 3 5
WIND GUST 21 24 17
CLOUDS B1 B2 B2 SC SC SC FW FW SC SC SC SC FW SC B2 B2 B2 B2 B2
CLOUDS(%) 69 84 70 35 31 28 9 13 29 42 49 37 22 46 76 74 82 84 86
VSBY 10 6 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 30 0 0 5 30
RAIN SHWRS SC SC SC
TSTMS
MIX HGT <1 <1 <1 5 7 7 <1 <1 <1 <1 <1 5 6 8 <1
T WIND DIR W NW NW NW NW NW NW NW NW NW N SW SW SW S
T WIND SPD 4 6 14 13 10 12 12 14 5 3 10 1 8 12 3
DISPERSION PR PR PR PR VP VP VP VP VP VP
ADI 3 5 16 81 76 60 6 7 3 2 12 7 56101 2
MAX LVORI 6 5 4 1 1 1 2 3 3 4 3 2 1 1 2
STABILITY E E B B B C F F G F A A B B E
CEILING 15800 None None None None None None 7300
STA PRES 29.10 29.14 29.12 29.24 29.29 29.29 29.21
Date 05/02Sun 05/03/26Mon 05/04/26Tue 05/05/26Wed 05/06/26
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 60 38 67 40 75 51 79 50 80
TEMP 57 56 45 43 64 59 45 46 72 68 56 55 76 70 56 55 76 72
DEWPT 45 43 37 36 32 34 33 36 40 45 47 49 48 48 46 49 50 53
RH 64 62 73 76 30 39 62 68 31 43 72 80 37 45 69 80 40 51
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 B1 SC CL FW CL CL FW SC FW SC FW SC SC SC SC SC
POP 12HR 50 20 0 0 10 10 20 5 20
RAIN SHWRS SC SC IS IS IS
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