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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Tue Apr 28 2026
NCZ005-282000-
RAWS 310540
36.38N 79.70W Elev. 858 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 70 55 73 52 70
TEMP 59 66 70 67 60 59 57 58 63 69 72 69 62 56 52 54 63 68 70 63
DEWPT 51 53 54 55 55 55 56 58 62 63 63 62 57 53 50 48 45 40 37 37
MAX/MIN RH 56 100 72 91 31
RH 75 63 57 65 84 87 96100 97 81 73 78 84 90 93 80 52 36 30 38
WIND DIR S SW SW S SW S S S S S SW W NW NW NW NW NW NW NW NW
WIND SPD 5 8 8 3 3 3 3 4 8 10 10 5 5 5 6 8 10 10 10 5
CLOUDS B2 B2 B1 SC SC B1 B2 OV OV OV OV B1 B1 SC SC SC SC FW FW FW
CLOUDS(%) 83 84 52 33 41 62 75 98 98 98 98 59 59 47 47 33 26 24 10 24
VSBY 7 10 10 10 10 8 10 10 6 5 7 10 10 10 10 10 10 10 10 10
POP 12HR 60 30 100 40 10
RAIN SHWRS IS O O O O SC SC
TSTMS SC SC
MIX HGT 2 3 3 <1 <1 <1 <1 <1 2 2 3 <1 <1 <1 <1 1 5 8 9 <1
T WIND DIR SW SW SW SW SW SW S S S S SW SW NW NW NW NW NW NW NW NW
T WIND SPD 14 20 13 12 10 4 3 9 12 16 19 8 16 13 13 23 21 16 16 11
DISPERSION VP VP VP VP PR PR PR PR PR
ADI 32 65 48 6 5 2 2 7 26 46 64 5 11 9 9 40129127143 5
MAX LVORI 3 1 1 3 5 6 8 8 4 3 3 4 4 5 5 3 1 1 1 2
STABILITY C C C G F F F C C C C E E E E B B B B F
CEILING 3400 None None 1500 1300 1700 3100 None None None
STA PRES 29.41 29.33 29.30 29.21 29.11 28.96 29.04 29.12 29.17 29.16
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 70 48 60 39 67 43 75
TEMP 47 48 67 62 52 48 56 55 45 44 64 61 48 48 72 68
DEWPT 37 38 38 42 44 45 45 42 36 35 33 35 36 38 42 44
RH 68 68 34 48 74 89 66 61 70 70 31 38 63 68 34 42
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC B1 B1 B2 B2 B2 B2 B1 SC FW FW FW FW CL 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