National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
1031 AM EDT Wed Jul 17 2024

NCZ001-172000-
RAWS 310141
36.40N  81.29W Elev. 3009 ft
1031 AM EDT Wed Jul 17 2024

Date             Wed 07/17/24            Thu 07/18/24            Fri 07/19/24
UTC 3hrly     09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00
EDT 3hrly     05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20

MAX/MIN TEMP                 84          64          76          58          74
TEMP                77 82 80 74 69 67 65 67 72 74 73 70 66 63 60 62 70 72 72 70
DEWPT               67 66 66 66 65 64 64 64 65 64 63 61 59 57 56 57 60 60 62 62
MAX/MIN RH                   59          97          72          87          67
RH                  71 58 62 76 87 90 97 90 79 71 71 73 78 81 87 84 71 66 71 76
WIND DIR             W  W  W  W  W  W NW NW NW NW NW  N  N  N  N  N  E SE SE SE
WIND SPD             8  8  8  5  5  4  4  4  4  5  4  4  4  3  3  3  3  4  3  3
CLOUDS              SC SC B1 B2 B2 B1 B1 B1 B2 B2 B2 B1 SC SC SC B1 B2 B2 B2 B2
CLOUDS(%)           31 48 67 82 79 60 59 58 71 78 78 67 49 50 47 55 72 71 71 70
VSBY                 7  7  6  4 10  7  6  7 10 10 10  5                        
POP 12HR                     50          50          60          20          50
RAIN SHWRS                SC SC SC SC SC SC NM NM SC IS IS       IS IS SC SC SC
TSTMS                     SC SC SC SC       IS NM SC                   IS IS   
LAL                  1  1  3  3  3  3  1  1  2  4  3  1  1  1  1  1  1  2  2   
HAINES               4  4  4  3  3  3  3  3  3  3  3  4  4  4  4  4  4  4  4  4
MIX HGT              3  5  4 <1 <1 <1 <1 <1  2  2  3 <1 <1 <1 <1 <1  4  5  4 <1
T WIND DIR           W SW SW SW  W NW NW NW NW NW  N  N  N  N  N NE  E SE  S SE
T WIND SPD           9  5 12  8  6 10 10 11  8  9 11 12 12  5  5  4  8  3  4  8
DISPERSION                   PR PR VP VP             VP VP VP VP             VP
ADI                 32 33 48  5  5  7  7  9 16 26 37  8  8  3  3  5 35 14 21  4
MAX LVORI            3  1  1  4  6  6  6  5  4  3  3  3  4  5  6  5  3  3  3  4
STABILITY            B  B  C  E  E  E  E  C  C  C  C  E  E  F  F  B  B  C  B  F
CEILING                    3000  6400   400   400  3400  None  None   800  1300
STA PRES                  27.18 27.18 27.20 27.25 27.25 27.29 27.31 27.36 27.34


Date          Sat 07/20/24Sun 07/21/24Mon 07/22/24Tue 07/23/24
UTC 6hrly     06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00
EDT 6hrly     02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20

MIN/MAX TEMP       62      73      61      76      62      76      63      76
TEMP          64 64 71 70 65 64 74 70 64 64 75 70 66 64 74 71
DEWPT         63 63 66 64 64 63 64 64 63 63 66 65 64 64 67 65
RH            97 97 84 81 97 97 71 81 97 97 74 84 93100 79 81
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B2 B2 B2 B2 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2
POP 12HR           30      60      40      60      50      60      50      60
RAIN SHWRS    SC SC SC NM SC IS SC NM SC IS SC NM SC SC SC NM
TSTMS               IS SC SC    IS SC SC    IS SC SC    IS SC

$$


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
LAL(CATEGORY).......................Lightning Activity Level
HAINES(CATEGORY)....................Haines Index
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