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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
131 AM EDT Thu May 1 2025
NCZ001-020800-
RAWS 310141
36.40N 81.29W Elev. 3009 ft
131 AM EDT Thu May 1 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 58 74 57 73 54
TEMP 61 60 61 68 71 73 66 64 60 58 59 69 72 71 66 61 57 55 58
DEWPT 56 56 57 57 55 55 56 55 55 54 56 56 56 57 57 55 54 54 55
MIN/MAX RH 92 52 92 56 97
RH 84 87 87 68 57 53 70 73 84 86 90 63 57 61 73 81 90 96 90
WIND DIR S SW S S S S S S SW SW SW SW SW SW SW W W W SW
WIND SPD 2 2 3 9 12 13 8 6 5 5 5 6 8 6 4 3 3 3 4
WIND GUST 23
CLOUDS B1 B1 B1 SC B1 B2 SC B1 B1 B1 B1 B1 B1 B1 SC B1 SC B1 B1
CLOUDS(%) 58 51 52 39 55 74 44 60 51 52 59 56 57 57 47 55 42 55 66
VSBY 10 9 9 10 10 10 10 10 10 8 7 10 10 10 10
POP 12HR 60 40 30 60 40
RAIN SHWRS IS SC IS IS SC SC SC SC SC NM SC SC SC SC NM
TSTMS SC SC IS IS IS SC SC SC SC IS
MIX HGT <1 <1 <1 3 5 4 <1 <1 <1 <1 <1 4 5 2 <1
T WIND DIR SW SW W SW SW S SW SW SW SW SW SW SW SW S
T WIND SPD 2 3 3 11 18 18 5 8 6 4 2 12 11 14 10
DISPERSION VP VP PR PR PR PR VP VP VP VP
ADI 1 2 3 47 75 50 5 5 5 3 2 46 49 38 7
MAX LVORI 5 5 5 1 1 1 3 3 4 6 7 1 1 1 3
STABILITY F F A B C D D E E E C C C C E
CEILING 2700 None 6600 None None None None None
STA PRES 27.28 27.28 27.21 27.21 27.20 27.21 27.19
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 67 47 64 44 63 46 67 48 70
TEMP 64 62 52 50 64 60 50 50 61 59 51 52 65 62 52 53 69 64
DEWPT 55 50 48 47 44 45 45 47 47 47 47 47 48 48 46 48 49 50
RH 73 65 86 89 48 58 83 89 60 64 86 83 54 60 80 83 49 60
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 SC 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 SC 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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