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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Tue Apr 28 2026
NCZ003-282000-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
801 AM EDT Tue Apr 28 2026
Date Tue 04/28/26 Wed 04/29/26 Thu 04/30/26
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 68 54 72 51 68
TEMP 57 62 68 66 61 58 56 57 61 66 72 68 61 57 53 52 61 65 67 61
DEWPT 52 54 56 56 56 55 55 57 60 63 62 60 55 51 48 46 44 40 37 37
MAX/MIN RH 64 100 71 85 33
RH 83 75 65 70 84 90 96100 97 90 71 76 81 80 83 80 53 40 33 41
WIND DIR S SW SW S SW SW SW S S SW SW W NW NW NW NW NW NW NW NW
WIND SPD 5 8 6 4 4 3 3 4 5 8 9 10 10 10 9 9 9 9 9 8
CLOUDS OV B2 B1 SC B1 B1 B2 OV OV OV OV B1 B1 SC SC SC SC FW FW FW
CLOUDS(%) 91 82 63 48 56 69 81 99 99 93 93 56 56 44 47 44 29 19 15 20
VSBY 6 10 10 10 10 7 8 7 4 6 10 10 10 10 10 10 10 10 10 10
POP 12HR 70 50 100 30 10
RAIN SHWRS IS O O O O SC SC
TSTMS SC SC
MIX HGT 2 3 3 <1 <1 <1 <1 <1 1 3 4 <1 <1 <1 <1 2 5 7 8 <1
T WIND DIR SW SW SW SW SW SW S S S S SW W NW NW NW NW NW NW NW NW
T WIND SPD 13 17 10 5 5 3 3 5 8 14 19 11 16 10 11 18 17 14 14 12
DISPERSION VP VP VP VP FR FR FR PR PR
ADI 29 50 34 4 4 2 2 4 15 47 72 10 14 9 10 45106117128 8
MAX LVORI 4 3 3 3 5 7 8 9 5 4 3 4 4 4 4 3 1 1 1 2
STABILITY C C C E E F F C C C C D D D D B B B B E
CEILING 2500 500 None 700 300 1100 None None None None
STA PRES 29.10 29.00 28.98 28.88 28.78 28.66 28.75 28.81 28.86 28.85
Date Fri 05/01/26Sat 05/02/26Sun 05/03/26Mon 05/04/26
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 44 68 47 60 38 67 41 73
TEMP 47 47 65 61 51 47 55 54 44 42 63 60 46 46 70 67
DEWPT 36 37 38 42 43 43 43 38 34 32 32 36 36 37 42 44
RH 65 68 37 49 74 86 64 54 68 67 31 41 68 71 36 43
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC B1 B2 B2 B2 B2 B1 SC FW FW FW FW FW FW FW
POP 12HR 5 20 50 50 10 5 5 10
RAIN SHWRS IS SC SC 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