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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
231 PM EDT Fri May 15 2026
NCZ005-160800-
RAWS 310540
36.38N 79.70W Elev. 858 ft
231 PM EDT Fri May 15 2026
Date 05/15/26 Sat 05/16/26 Sun 05/17/26 Mon
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 51 84 62 90 65
TEMP 75 69 58 55 52 57 74 82 83 77 69 66 63 65 79 88 89 83 72 68 65 69
DEWPT 38 42 42 42 43 46 50 50 52 54 53 53 55 58 60 58 58 61 61 61 62 63
MIN/MAX RH 72 32 79 34 89
RH 26 37 55 61 71 67 43 33 34 45 57 63 75 78 52 36 35 47 68 78 90 81
WIND DIR W SW SW SW SW SW SW SW SW SW SW SW SW SW SW S S S S S SW SW
WIND SPD 5 2 2 2 2 3 8 9 9 4 6 6 5 6 5 5 6 3 3 4 4 4
CLOUDS CL CL FW FW FW FW FW FW SC SC SC B1 B1 B1 SC FW FW FW SC FW FW FW
CLOUDS(%) 5 2 10 7 11 20 12 13 38 39 29 66 69 56 35 18 16 20 27 14 8 6
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 0 5
MIX HGT 6 <1 <1 <1 <1 <1 3 5 5 <1 <1 <1 <1 1 3 7 8 <1
T WIND DIR W SW S S SW SW SW SW SW SW SW SW SW SW W S S S
T WIND SPD 8 2 3 4 3 5 17 14 16 6 6 5 4 6 9 4 9 5
DISPERSION VP VP VP VP VP PR PR PR VP VP VP VP
ADI 60 1 2 2 2 6 70 92100 3 3 4 3 9 37 39 76 3
MAX LVORI 1 2 2 3 3 3 1 1 1 2 3 3 4 4 1 1 1 2
STABILITY A G G G G A B B B F F E E B A A B G
CEILING None None None None None None 14200 None None None
STA PRES 29.31 29.35 29.39 29.41 29.33 29.35 29.37 29.43 29.40
Date 05/18Tue 05/19/26Wed 05/20/26Thu 05/21/26Fri 05/22/26
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 91 64 91 67 90 65 78 58 75
TEMP 90 86 71 68 90 85 72 71 89 82 70 67 77 71 63 61 73 70
DEWPT 60 59 59 62 57 56 60 64 60 62 63 63 60 61 59 58 58 59
RH 37 40 66 81 33 37 66 79 38 51 78 87 56 71 87 90 59 68
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS CL CL CL CL FW FW FW FW SC B1 B1 B1 B1 B2 B1 B1 B1 B1
POP 12HR 5 0 5 5 30 40 60 40 40
RAIN SHWRS SC SC IS SC NM SC SC SC SC
TSTMS SC IS IS 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