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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Wed Apr 2 2025
NCZ006-030800-
RAWS 310801
36.37N 79.29W Elev. 580 ft
801 PM EDT Wed Apr 2 2025
Date 04/02/25 Thu 04/03/25 Fri 04/04/25 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 61 80 66 88 65
TEMP 62 62 62 62 69 76 79 77 72 70 68 66 76 85 88 82 72 70 67 65
DEWPT 58 60 61 62 65 65 65 65 64 63 63 64 65 64 62 62 62 62 61 61
MIN/MAX RH 100 61 91 42 87
RH 87 93 97100 87 69 62 67 76 78 84 93 69 50 42 51 71 76 81 87
WIND DIR SE S S S S SW SW S S S SW SW SW SW SW SW S S SW S
WIND SPD 6 6 8 8 10 11 10 5 5 8 8 8 9 10 8 3 2 3 3 4
WIND GUST 17 18 18 18 20 23 21 16 18 18 19
CLOUDS OV OV OV OV OV OV B2 SC SC B1 B2 B2 B1 SC SC SC SC B1 B1 B1
CLOUDS(%) 100100100100100100 72 45 47 67 84 85 65 44 39 40 36 61 65 63
VSBY 5 7 10 8 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 10 0 10 10
DRIZZLE S S S
RAIN S S S
Obvis PF
MIX HGT <1 <1 <1 <1 2 3 3 <1 <1 <1 <1 <1 3 4 4 <1
T WIND DIR S S S S S SW SW S S SW SW SW SW SW SW SW
T WIND SPD 11 10 11 10 17 25 24 10 9 9 11 10 17 16 16 13
DISPERSION PR PR PR PR PR PR PR VP VP VP VP
ADI 10 9 10 11 32 59 60 7 6 8 10 12 38 60 84 6
MAX LVORI 5 6 7 7 4 1 1 3 4 4 4 5 3 1 1 2
STABILITY D D D D D D D E E D D D D C B G
CEILING 700 700 800 1900 31000 12800 1300 None None
STA PRES 29.54 29.54 29.59 29.53 29.57 29.59 29.65 29.60
Date 04/05Sun 04/06/25Mon 04/07/25Tue 04/08/25Wed 04/09/25
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 87 67 86 59 69 42 59 32 61
TEMP 85 82 71 67 86 75 65 59 68 61 50 42 57 52 38 33 57 54
DEWPT 63 58 58 60 58 58 59 50 45 40 33 29 26 25 25 25 27 27
RH 48 44 63 78 39 55 81 72 43 46 52 60 30 35 59 72 31 35
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 SC B1 B1 B2 B2 OV OV B2 B2 B2 SC FW FW FW FW FW FW
POP 12HR 5 0 40 70 60 30 10 0 5
RAIN SHWRS SC NM NM NM SC SC IS
TSTMS IS 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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