National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 PM EDT Thu Apr 18 2024

NCZ019-190800-
RAWS 312001
36.23N  81.32W Elev. 2380 ft
801 PM EDT Thu Apr 18 2024

Date           04/18/24      Fri 04/19/24            Sat 04/20/24            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                 57          76          54          69          46
TEMP                65 62 60 60 66 72 74 68 63 59 57 57 63 68 67 59 55 51 49 48
DEWPT               41 41 43 45 49 52 53 55 55 53 50 46 45 41 37 34 32 32 34 35
MIN/MAX RH                   58          46          80          33          61
RH                  41 46 53 58 54 49 48 63 75 80 77 67 52 37 33 39 41 48 56 60
WIND DIR             N NW NE  N  S SW  W  W NW  N  N  N NW NW NW NW NW  N  N NE
WIND SPD             2  2  2  1  3  4  8  6  5  5  4  5  6 10 10  9  6  4  3  2
CLOUDS              FW SC SC B2 OV B2 B1 B1 B1 B1 B1 B2 B1 B1 SC SC SC SC B1 B2
CLOUDS(%)            7 35 47 84 97 79 67 62 62 57 64 71 57 57 44 43 50 50 64 74
VSBY                10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10            
POP 12HR                     20          50          30          10          20
RAIN SHWRS                   IS SC SC SC SC                            IS IS IS
TSTMS                                 SC SC                                    
LAL                  1  1  1  1  1  1  3  3  1  1  1  1  1  1  1  1            
HAINES               5  5  5  5  4  4  3  3  3  3  3  3  4  4  4  4            
MIX HGT             <1 <1 <1 <1  2  4  4 <1 <1 <1 <1 <1  3  5  5 <1            
T WIND DIR          NW NW NW NW SW SW SW  W NW  N  N  N  N NW NW NW            
T WIND SPD           1  2  2  2 13 13 11  3  9 12 12 12 11 12 12 16            
DISPERSION          VP VP VP             PR PR PR VP             PR PR VP VP   
ADI                  1  1  1  2 28 50 42  2  6  8  8 15 43 74 72 14            
MAX LVORI            2  2  2  3  2  1  1  3  3  4  4  3  1  1  1  2            
STABILITY            G  G  F  A  B  C  C  E  E  E  E  B  B  B  B  D            
CEILING              None 23700  5700  2200  3000 19000 15800  None  None      
STA PRES            27.94 27.91 27.89 27.83 27.86 27.90 27.93 27.91            


Date           04/21Mon 04/22/24Tue 04/23/24Wed 04/24/24Thu 04/25/24
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       57      42      61      42      70      50      71      45      67
TEMP          55 52 46 45 57 55 47 47 64 63 56 54 67 62 52 49 63 61
DEWPT         39 39 36 34 36 39 35 37 41 43 44 45 44 42 38 38 38 39
RH            55 61 68 65 45 55 63 68 43 48 64 71 43 48 59 66 39 44
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B2 B2 B2 B1 SC SC FW FW FW FW SC SC SC SC FW SC SC SC
POP 12HR           30      20      10       0       0      10      20       5      10
RAIN SHWRS    IS SC 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
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