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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
831 PM EDT Wed Apr 30 2025
NCZ001-010800-
RAWS 310142
36.40N 81.46W Elev. 4608 ft
831 PM EDT Wed Apr 30 2025
Date 04/30/25 Thu 05/01/25 Fri 05/02/25 Sat
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 57 68 56 69 53
TEMP 60 60 59 60 64 66 67 60 60 58 57 57 63 67 66 62 58 55 54 56
DEWPT 54 53 53 52 52 51 53 54 53 52 51 53 53 52 53 53 52 51 51 52
MIN/MAX RH 82 59 85 58 90
RH 81 78 80 75 65 58 61 81 78 80 80 86 70 59 63 72 80 86 90 86
WIND DIR S SW SW SW S S S S S SW SW W W SW SW SW SW W W SW
WIND SPD 5 8 8 6 11 13 14 13 14 14 13 12 12 10 8 9 10 10 10 10
WIND GUST 25 25
CLOUDS B1 B1 SC B1 SC SC B2 SC B1 B1 B1 B1 B1 B1 B1 SC SC SC B1 B1
CLOUDS(%) 55 64 49 55 35 46 71 42 58 53 55 64 58 56 59 45 49 40 57 64
VSBY 10 9 9 9 10 10 10 10 10 10 9 7 10 10 10 10
POP 12HR 70 40 30 60 40
RAIN SHWRS IS SC SC SC IS SC SC SC SC SC NM SC SC SC SC NM
TSTMS IS SC SC IS IS IS SC SC SC SC IS IS
MIX HGT <1 <1 <1 <1 4 4 2 <1 <1 <1 <1 <1 3 4 3 <1
T WIND DIR S SW SW W SW SW SW S SW SW W SW SW SW SW S
T WIND SPD 3 2 4 3 14 16 12 5 10 9 5 8 13 11 12 9
DISPERSION PR PR PR FR GD GD FR PR FR FR FR
ADI 2 2 4 3 54 58 26 5 9 8 5 9 34 45 41 8
MAX LVORI 3 4 4 4 1 1 2 4 4 4 5 4 3 1 1 3
STABILITY E D D C C C D D D D D D D C C D
CEILING 14500 None None 800 None 400 800 None None
STA PRES 26.76 26.76 26.76 26.70 26.69 26.69 26.69 26.67
Date 05/03Sun 05/04/25Mon 05/05/25Tue 05/06/25Wed 05/07/25
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 62 45 60 43 59 45 62 47 65
TEMP 59 57 48 48 58 55 47 48 55 55 48 49 60 57 48 53 64 60
DEWPT 51 47 46 44 41 42 42 44 43 45 44 44 45 45 44 45 46 47
RH 75 69 93 86 53 61 83 86 64 69 86 83 58 64 86 74 52 62
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 B1 B1 SC SC SC SC SC SC SC SC SC FW FW SC SC SC
POP 12HR 80 40 40 30 40 30 30 20 30
RAIN SHWRS NM O SC SC SC SC SC SC SC SC SC IS SC SC IS IS IS SC
TSTMS IS SC SC IS 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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