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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
501 PM EDT Thu Mar 19 2026
NCZ005-200800-
RAWS 310540
36.38N 79.70W Elev. 858 ft
501 PM EDT Thu Mar 19 2026
Date 03/19/26 Fri 03/20/26 Sat 03/21/26 Sun
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 39 71 52 77 52
TEMP 56 47 44 41 40 58 69 70 64 60 57 54 52 65 74 76 69 61 58 55 53
DEWPT 35 35 36 35 36 41 39 39 39 40 43 45 47 52 51 48 50 50 50 50 50
MIN/MAX RH 86 31 83 37 91
RH 45 63 73 79 85 53 33 32 40 47 59 71 83 63 44 37 51 67 75 83 89
WIND DIR S SW SW SW SW SW SW SW SW SW SW SW W W NW W SW S SW SW W
WIND SPD 2 2 2 2 2 5 10 11 8 9 8 6 5 5 5 4 2 2 3 3 3
CLOUDS FW CL CL FW FW FW SC B2 B1 B1 B1 B1 B1 B2 B1 B1 SC FW SC FW SC
CLOUDS(%) 19 2 5 8 7 22 29 78 64 67 66 68 65 72 66 63 31 17 26 23 35
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 5 20 5 5
RAIN SHWRS IS IS
MIX HGT <1 <1 <1 <1 <1 2 5 5 <1 <1 <1 <1 <1 2 5 5 <1
T WIND DIR S S S SW SW SW SW SW SW SW SW SW W NW N S SE
T WIND SPD 2 2 3 3 2 10 17 21 9 11 11 10 5 11 4 3 3
DISPERSION VP VP VP VP PR PR PR PR VP VP VP VP
ADI 1 1 2 2 2 22 68 88 8 10 10 7 4 32 19 15 2
MAX LVORI 2 3 3 5 5 2 1 1 2 2 2 3 5 1 2 2 2
STABILITY G G G G B B C C D D D E C C C C G
CEILING None None None 16600 9800 14800 14800 None None
STA PRES 29.44 29.42 29.40 29.26 29.19 29.13 29.18 29.14
Date 03/22Mon 03/23/26Tue 03/24/26Wed 03/25/26Thu 03/26/26
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 83 59 75 39 60 42 62 44 71
TEMP 81 73 64 60 72 64 47 40 57 53 47 44 61 58 50 47 67 68
DEWPT 53 52 52 51 44 32 28 26 24 26 29 35 38 38 39 41 45 47
RH 38 48 65 72 37 30 47 57 28 35 49 70 42 47 66 79 45 47
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW SC SC FW FW FW FW SC B1 B2 B1 B1 B1 SC SC SC
POP 12HR 0 5 10 10 5 10 20 10 10
RAIN SHWRS 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