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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1031 PM EDT Mon Apr 27 2026
VAZ046-280800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
1031 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 46 66 51 70 50
TEMP 53 49 46 48 57 61 66 63 57 54 52 55 64 67 68 66 61 57 52 50
DEWPT 42 41 41 40 43 47 50 52 52 51 51 53 58 60 62 60 57 51 47 45
MIN/MAX RH 84 57 99 79 85
RH 66 74 83 74 59 60 56 67 83 90 96 93 81 78 81 81 87 80 83 83
WIND DIR SE S S SW S S SW S S S S S S S S SW W W NW NW
WIND SPD 4 3 3 2 5 6 5 3 2 2 2 3 5 8 9 6 6 8 8 9
WIND GUST 17 19
CLOUDS CL SC B2 B1 B2 B2 B1 B1 SC B1 B2 B2 OV OV OV B1 B1 SC SC FW
CLOUDS(%) 0 29 70 63 78 85 62 58 46 57 70 84 90100100 61 61 30 27 17
VSBY 10 10 10 10 10 10 10 10 10 5 6 10 3 3 3 10 10 10 10 10
POP 12HR 5 60 30 100 40
RAIN SHWRS IS NM SC IS SC SC O O O O SC SC
TSTMS SC SC
MIX HGT <1 <1 <1 <1 2 3 3 <1 <1 <1 <1 <1 2 2 2 <1
T WIND DIR SE S S S S S S S NE NE E S S S S S
T WIND SPD 11 12 3 13 6 12 9 6 1 1 1 4 11 14 13 10
DISPERSION VP VP VP VP VP VP VP PR PR PR PR
ADI 5 6 2 15 17 37 27 3 1 1 1 5 23 29 25 7
MAX LVORI 3 3 5 4 2 1 2 3 6 6 10 7 3 3 3 4
STABILITY F G G B C C C F F F F B C D D E
CEILING 13100 3700 900 None 1800 1200 1700 None
STA PRES 29.49 29.48 29.38 29.34 29.26 29.17 28.99
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 69 41 69 46 60 38 68 44 75
TEMP 66 60 47 46 67 62 51 47 57 55 46 43 65 62 49 49 73 67
DEWPT 37 34 35 37 38 40 41 41 41 38 35 34 34 37 37 41 43 43
RH 34 37 63 71 34 44 68 79 55 53 65 70 31 39 63 74 34 42
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW FW SC B1 B1 B1 B1 SC FW FW SC FW FW FW SC
POP 12HR 10 5 20 40 40 20 5 5 10
RAIN SHWRS IS SC 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
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