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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1231 AM EDT Mon May 11 2026
NCZ003-120800-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
1231 AM EDT Mon May 11 2026
Date 05/10/26 Mon 05/11/26 Tue 05/12/26 Wed
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 57 63 42 74 47
TEMP 61 58 57 60 60 60 59 52 47 45 49 64 70 73 67 55 51 48 53
DEWPT 51 51 54 54 52 52 49 45 39 36 41 42 44 44 46 45 43 43 45
MIN/MAX RH 92 69 79 35 80
RH 70 77 90 81 75 75 69 77 74 70 74 45 39 35 47 69 74 83 74
WIND DIR NW N E NE NE NE E NW NW NW N N S S S N N N SW
WIND SPD 3 3 4 6 4 4 2 2 3 3 0 0 2 4 1 0 0 0 1
CLOUDS B1 B2 OV OV OV B2 SC CL FW FW FW FW FW FW FW FW FW FW B1
CLOUDS(%) 62 84100100 92 75 47 5 15 20 11 7 13 16 15 9 10 19 51
VSBY 10 10 9 8 8 9 10 9 10 5 10 10 10 10 10 10 10 10 10
POP 12HR 50 80 0 0 0
RAIN SHWRS IS NM O NM SC
TSTMS IS
MIX HGT <1 <1 1 2 2 2 <1 <1 <1 <1 <1 5 7 6 <1
T WIND DIR N N NE E NE NE NW W NW NW NW N SW SW S
T WIND SPD 3 4 8 9 14 8 1 2 3 5 4 5 3 9 4
DISPERSION VP VP VP VP VP VP VP VP VP VP
ADI 2 2 11 16 27 24 1 1 2 3 4 37 27 71 2
MAX LVORI 4 5 5 4 3 3 4 5 4 5 3 1 2 1 2
STABILITY F F D D D B F G G G A A A A G
CEILING 7000 900 1300 None None None None None
STA PRES 28.14 28.22 28.22 28.26 28.28 28.30 28.27
Date 05/13Thu 05/14/26Fri 05/15/26Sat 05/16/26Sun 05/17/26
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 74 48 70 44 77 52 85 56 87
TEMP 71 68 54 51 68 63 48 49 73 70 55 58 82 78 62 62 85 80
DEWPT 54 56 49 45 43 43 40 40 43 48 46 47 54 57 54 54 57 58
RH 55 65 83 80 40 48 74 71 34 45 72 67 38 48 75 75 39 47
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B2 SC FW CL FW FW CL FW FW SC SC SC SC SC SC FW SC
POP 12HR 50 20 0 0 0 5 20 10 10
RAIN SHWRS SC SC IS IS
TSTMS SC 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