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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
225 AM EDT Tue Sep 22 2026
VAZ046-230800-
RAWS 441101
37.39N 78.80W Elev. 804 ft
225 AM EDT Tue Sep 22 2026
Date 09/21/26 Tue 09/22/26 Wed 09/23/26 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 64 70 56 61 53
TEMP 65 66 70 70 67 64 62 61 59 58 59 60 61 59 58 57 55 53
DEWPT 65 66 69 66 64 61 61 60 59 58 59 60 60 59 58 56 54 52
MIN/MAX RH 100 87 100 96 100
RH 100100 97 87 90 90 97 97100100100100 97100100 96 96 96
WIND DIR NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE N
WIND SPD 4 4 6 10 13 13 12 12 14 14 13 13 13 13 12 12 13 13
WIND GUST 24 26 24 24 25 25 25 26 25 25 24 24 25
CLOUDS OV B2 OV OV OV OV OV OV OV B2 B2 B2 OV OV B2 B2 B2 B2
CLOUDS(%) 89 80 89 89 92 89 95 93 95 85 85 85 93 92 81 81 82 74
VSBY 1 0 2 4 3 3 2 4 5 4 3 6 6 6 6 6 6
POP 12HR 90 80 90 70 50
RAIN L L C C C C C C C
RAIN SHWRS NM NM NM SC NM O O O O
TSTMS SC SC SC SC
Obvis PFPF+ PF PF PF PF
MIX HGT <1 <1 <1 1 1 <1 <1 1 1 1 2 2 2 1 <1 2 1 2
T WIND DIR E E E NE NE N N N N N NE NE NE NE N N N N
T WIND SPD 6 9 6 12 18 14 14 14 14 18 17 16 16 14 16 16 17 17
DISPERSION VP FR FR FR GD FR FR FR FR
ADI 5 10 9 19 29 13 13 13 13 27 30 29 30 13 14 18 19 30
MAX LVORI 9 7 6 4 4 5 5 5 5 4 4 4 4 5 5 5 5 4
STABILITY E D D D D D D D D D D D D D D D D D
CEILING 400 400 500 500 500 600 600 600 3100
STA PRES 29.33 29.38 29.41 29.47 29.48 29.54 29.56 29.57 29.54
Date 09/24Fri 09/25/26Sat 09/26/26Sun 09/27/26Mon 09/28/26
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 63 49 71 49 73 52 75 52 76
TEMP 62 59 51 51 69 61 52 51 71 62 54 53 72 64 54 54 74 65
DEWPT 56 55 51 48 50 50 45 46 50 51 49 48 53 55 51 51 58 59
RH 81 87100 89 51 67 77 83 47 67 83 83 51 73 90 90 57 81
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B2 B2 SC FW FW FW FW FW FW FW FW FW FW SC FW FW SC SC
POP 12HR 30 0 0 0 0 0 0 0 0
RAIN C
$$
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