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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Fri May 1 2026
VAZ046-012000-
RAWS 441101
37.39N 78.80W Elev. 804 ft
801 AM EDT Fri May 1 2026
Date Fri 05/01/26 Sat 05/02/26 Sun 05/03/26
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 70 48 60 39 66
TEMP 61 66 70 62 57 54 50 48 55 58 60 55 49 44 40 43 55 63 65 59
DEWPT 34 36 37 40 43 43 42 42 42 41 40 41 40 37 34 34 32 31 31 33
MAX/MIN RH 29 78 48 80 27
RH 36 33 30 44 59 66 74 80 61 53 47 59 71 76 79 70 41 30 28 37
WIND DIR SE S SW SW W NW N N NE NE NE N NW NW NW NW NW W W W
WIND SPD 4 6 9 4 5 4 4 5 5 5 5 4 4 5 5 5 8 8 6 3
CLOUDS SC FW SC B1 B2 B1 B2 OV OV B2 B2 B1 B1 SC FW FW CL CL CL CL
CLOUDS(%) 28 9 33 62 86 64 87 91 89 87 78 68 59 37 14 6 5 3 2 4
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 20 40 20 0
RAIN S C C C C S S
MIX HGT 4 6 7 <1 1 <1 <1 2 4 6 6 <1 <1 <1 <1 2 6 7 7 <1
T WIND DIR SE S SW S S SW N N N N N N NW NW NW NW NW W W SW
T WIND SPD 4 11 16 13 11 3 6 11 10 11 8 3 20 9 5 13 10 13 13 3
DISPERSION VP PR VP VP VP VP PR PR VP
ADI 25 74124 9 8 2 5 31 45 74 57 2 14 4 3 31 68103108 2
MAX LVORI 2 1 1 2 3 3 3 3 1 1 1 3 3 4 5 3 1 1 1 2
STABILITY A B B E E E E C B B B E E F F A B B B G
CEILING None None 15700 5900 9100 13800 None None None None
STA PRES 29.30 29.20 29.20 29.21 29.19 29.15 29.24 29.34 29.38 29.30
Date Mon 05/04/26Tue 05/05/26Wed 05/06/26Thu 05/07/26
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 41 77 53 81 58 77 55 72
TEMP 45 46 73 70 59 56 78 73 64 60 74 71 61 57 70 64
DEWPT 33 36 42 44 45 47 48 48 51 54 57 55 53 51 45 43
RH 62 68 33 39 60 72 35 41 63 81 55 57 75 80 41 46
WIND SPD <15 <15 <15 15> <15 15> <15 <15
AVG CLOUDS FW FW FW FW FW SC FW SC B1 B1 B1 B2 B1 B1 B1 B1
POP 12HR 0 5 0 5 30 60 50 40
RAIN SHWRS SC SC NM SC SC SC SC
TSTMS IS IS 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