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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
101 AM EDT Tue May 12 2026
NCZ006-130800-
RAWS 310801
36.37N 79.29W Elev. 580 ft
101 AM EDT Tue May 12 2026
Date 05/11/26 Tue 05/12/26 Wed 05/13/26 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 43 77 51 79 50
TEMP 47 44 46 65 73 76 69 58 56 52 55 72 78 75 69 60 56 51 53
DEWPT 46 43 46 48 44 43 45 44 44 45 49 53 52 55 58 58 56 51 49
MIN/MAX RH 100 32 81 41 100
RH 96 96100 54 35 31 42 59 64 77 80 51 40 50 68 93100100 86
WIND DIR N N N N S S S S S S SW SW SW SW SW SW W W NW
WIND SPD 0 0 0 0 3 4 3 3 5 4 4 9 10 9 3 2 2 3 4
WIND GUST 21
CLOUDS SC B1 B2 CL FW CL FW CL FW CL CL FW B1 B1 B2 B2 SC FW FW
CLOUDS(%) 48 68 76 5 8 4 7 4 6 3 5 10 69 69 82 82 30 14 8
VSBY 3 0 1 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 0 0 0 60 70
RAIN SHWRS IS SC NM SC
TSTMS SC SC
Obvis F F F
MIX HGT <1 <1 <1 3 7 7 <1 <1 <1 <1 1 5 7 4 <1
T WIND DIR SW W W S SW SW S S S SW SW SW SW SW SW
T WIND SPD 1 2 1 2 4 9 4 4 8 8 17 20 20 21 5
DISPERSION VP VP VP VP PR VP VP VP VP VP
ADI 1 1 1 9 39 81 2 2 4 4 30115 99 85 3
MAX LVORI 10 10 10 2 1 1 2 3 3 4 3 1 1 1 3
STABILITY G F A A A A G G F F A B C C F
CEILING 35000 None None None None None 3500 400
STA PRES 29.56 29.60 29.52 29.51 29.47 29.41 29.25
Date 05/14Fri 05/15/26Sat 05/16/26Sun 05/17/26Mon 05/18/26
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 72 43 75 50 88 61 91 63 92
TEMP 69 62 47 47 71 68 54 56 85 80 66 65 89 83 69 67 91 85
DEWPT 43 43 43 43 42 48 46 50 54 58 56 59 58 60 59 61 60 61
RH 39 50 86 86 35 49 74 80 35 47 70 81 35 46 70 81 36 45
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW CL CL FW SC SC SC FW SC SC SC FW SC FW FW FW
POP 12HR 0 0 0 0 5 20 5 5 10
RAIN SHWRS IS
TSTMS 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