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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 PM EDT Mon Apr 27 2026
NCZ005-280800-
RAWS 310540
36.38N 79.70W Elev. 858 ft
731 PM EDT Mon Apr 27 2026
Date 04/27/26 Tue 04/28/26 Wed 04/29/26 Thu
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 45 69 54 71 51
TEMP 62 54 51 47 49 58 63 67 66 59 57 55 57 63 67 71 68 62 58 53 52
DEWPT 41 42 43 42 43 47 51 53 55 55 54 55 56 61 62 63 61 57 53 49 47
MIN/MAX RH 84 59 100 76 88
RH 46 64 74 83 80 67 65 61 68 87 90100 96 93 84 76 78 84 83 86 83
WIND DIR E SE SE SE S S SW SW S SW SW S S S S SW W W NW NW NW
WIND SPD 3 4 4 2 2 4 6 6 3 3 3 3 4 6 10 10 6 6 5 6 8
CLOUDS SC FW FW SC B2 B2 B2 B1 SC B1 B2 B1 OV OV OV OV B1 B1 SC SC FW
CLOUDS(%) 29 24 25 38 72 85 84 58 45 55 71 67 94 94 99 99 59 59 38 28 21
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 3 5 5 10
POP 12HR 5 50 40 100 40
RAIN SHWRS IS SC SC IS SC SC O O O O SC SC IS IS
TSTMS IS IS SC
MIX HGT <1 <1 <1 <1 <1 2 3 3 <1 <1 <1 <1 <1 1 2 3 <1
T WIND DIR E SE SE S S S S S S SW SW SW S SW SW SW W
T WIND SPD 10 4 8 4 11 12 12 16 12 13 9 5 10 10 18 23 12
DISPERSION VP VP VP VP VP VP VP VP PR PR PR PR
ADI 5 2 4 2 13 31 41 55 6 6 4 3 8 17 39 72 8
MAX LVORI 2 3 4 6 4 3 1 1 3 5 6 9 8 5 4 3 4
STABILITY G F F F B C C C F F F F C C C C E
CEILING None None 3400 1600 2600 2500 500 2500 None
STA PRES 29.47 29.46 29.43 29.34 29.30 29.22 29.14 28.98
Date 04/30Fri 05/01/26Sat 05/02/26Sun 05/03/26Mon 05/04/26
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 70 44 70 47 62 40 69 44 75
TEMP 67 62 48 48 67 63 52 49 58 56 46 44 65 62 50 50 72 67
DEWPT 39 36 37 38 39 42 45 46 44 39 36 35 35 37 38 41 44 44
RH 36 38 65 68 36 46 77 89 59 53 68 70 33 39 63 71 37 43
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW SC SC B1 B1 B2 B1 B1 SC FW FW FW FW FW FW FW
POP 12HR 10 5 20 50 40 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