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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Mon Apr 27 2026
NCZ005-272000-
RAWS 310540
36.38N 79.70W Elev. 858 ft
801 AM EDT Mon Apr 27 2026
Date Mon 04/27/26 Tue 04/28/26 Wed 04/29/26
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 71 44 69 53 74
TEMP 60 69 71 65 54 51 46 48 59 65 68 66 58 57 54 57 65 70 73 70
DEWPT 43 41 41 42 43 43 43 44 48 51 52 53 54 54 54 55 60 61 61 61
MAX/MIN RH 33 94 57 100 68
RH 53 36 34 43 66 74 89 86 67 60 57 63 86 90100 93 84 73 66 73
WIND DIR NE NE E E SE SE SE S S SW SW SW S SW S S S S SW SW
WIND SPD 6 6 6 4 4 4 2 2 4 6 6 3 3 3 3 4 6 10 10 6
CLOUDS FW FW CL SC SC SC SC B2 B2 OV B2 SC SC B1 B1 OV OV OV OV B1
CLOUDS(%) 7 11 5 27 31 48 31 71 83 89 74 41 50 61 62 92 92 98 98 61
VSBY 10 10 10 10 10 10 10 10 9 10 10 10 10 10
POP 12HR 0 10 60 30 100
RAIN SHWRS NM NM SC SC SC SC O O O O SC
TSTMS IS SC SC
MIX HGT 3 4 4 <1 <1 <1 <1 <1 2 3 4 <1 <1 <1 <1 <1 2 2 3 <1
T WIND DIR NE NE E E E SE SE S NE S SW SW S SW S S S SW SW W
T WIND SPD 10 9 10 9 5 5 3 10 11 13 13 11 5 6 5 12 24 25 23 14
DISPERSION VP VP VP VP VP VP VP VP PR
ADI 40 42 54 4 3 4 2 12 22 46 49 5 3 3 3 10 60 58 68 10
MAX LVORI 1 1 1 2 3 4 7 5 3 1 1 3 6 6 9 6 4 3 1 3
STABILITY B B B F F E G B C C C F F F F C C C C E
CEILING None None None None 4300 1600 None 2200 800 1700
STA PRES 29.5 29.44 29.48 29.46 29.49 29.37 29.32 29.21 29.07 28.95
Date Thu 04/30/26Fri 05/01/26Sat 05/02/26Sun 05/03/26
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 52 69 42 70 44 66 40 70
TEMP 59 53 67 63 48 46 67 63 51 47 63 60 46 45 67 63
DEWPT 54 48 39 34 34 35 36 38 41 40 37 34 33 35 33 34
RH 83 83 36 34 58 65 32 39 68 76 38 37 60 68 28 34
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 SC SC FW FW SC FW SC B1 B1 B1 SC SC FW FW FW
POP 12HR 40 10 10 20 30 30 10 5
RAIN SHWRS SC IS SC SC SC 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