National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
947 PM EDT Sat Jun 23 2018

NCZ006-240900-
RAWS 310801
36.37N  79.29W Elev. 580 ft
947 PM EDT Sat Jun 23 2018

Date           06/23/18      Sun 06/24/18            Mon 06/25/18            Tue
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                 70          91          71          90          68
TEMP                77 73 71 74 84 88 90 84 78 75 73 75 83 87 89 82 76 73 71 72
DEWPT               72 69 69 69 70 70 70 71 71 70 70 70 69 69 70 70 69 67 66 65
MIN/MAX RH                   92          53          94          54          89
RH                  85 87 93 84 63 55 52 65 79 84 90 84 63 55 54 67 79 81 84 79
WIND DIR            SW SW SW  W  W  W SW SW  W  W  W NW NW NW NW  N  N NE NE NE
WIND SPD             2  2  2  3  8  9  9  3  3  2  1  1  3  5  5  3  2  4  5  8
CLOUDS              FW SC SC SC SC SC B1 B1 B1 SC SC SC SC B1 B1 B1 B1 B1 B1 B1
CLOUDS(%)           23 34 37 31 28 49 59 52 57 37 35 42 49 54 55 54 54 55 61 64
VSBY                 7  7  7  7  7  6  6  4  6  7  7  7                        
POP 12HR                     10          40          20          20          20
RAIN SHWRS                         IS SC IS                IS IS IS IS         
TSTMS                              IS SC IS                IS IS IS IS         
Obvis                     PF                                                   
LAL                  1  1  1  1  1  2  3  2  1  1  1  1  1  2  2               
HAINES               4  3  3  3  4  4  4  4  4  3  4  5  4  4  4  3            
MIX HGT             <1 <1 <1 <1  3  5  5 <1 <1 <1 <1 <1  3  4  5  2            
T WIND DIR          SW SW SW  W  W  W  W SW  W  W  W NW NW  W  W NW            
T WIND SPD           3  3  3  4 17 14 13  3  3  2  1  1  3  6  6 12            
DISPERSION          VP VP VP             VP VP VP VP             VP VP VP PR   
ADI                  2  2  2  4 53 61 55  1  1  1  1  1 14 21 22  6            
MAX LVORI            5  6  7  6  1  1  1  3  4  5  7  6  2  2  2  3            
STABILITY            F  F  G  C  C  C  C  F  F  G  G  B  B  D  D  F            
CEILING                    None  None  None  None  None  None  None  None      
STA PRES                  29.25 29.30 29.28 29.32 29.38 29.42 29.40            


Date           06/26 Wed 06/27/18 Thu 06/28/18 Fri 06/29/18 Sat 06/30/18
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      69      88      71      91      72      94      73      93
TEMP          81 78 72 73 85 82 75 76 88 84 76 78 91 87 77 77 90 85
DEWPT         63 65 66 66 67 69 69 70 72 74 73 72 71 71 72 72 72 72
RH            54 64 81 79 55 65 82 82 59 72 90 82 52 59 85 85 56 65
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B1 SC SC B1 B1 SC B1 B1 B1 B1 B1 SC SC B1 B1 SC SC B1
POP 12HR            5       5      30      20      20      20      30      30      30
RAIN SHWRS                   SC IS       IS IS       SC SC       SC
TSTMS                        SC IS       IS IS       SC SC       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