National Weather Service United States Department of Commerce

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
731 AM EDT Thu May 1 2025

NCZ019-012000-
RAWS 312001
36.23N  81.32W Elev. 2380 ft
731 AM EDT Thu May 1 2025

Date             Thu 05/01/25            Fri 05/02/25            Sat 05/03/25
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                 80          60          78          59          74
TEMP             63 73 78 76 69 66 64 62 64 72 76 75 69 64 61 61 60 68 73 71 65
DEWPT            59 60 56 56 57 56 56 55 58 59 58 58 58 56 56 56 58 59 57 56 55
MAX/MIN RH                   46          85          53          91          57
RH               87 64 47 50 66 70 75 78 81 64 54 55 68 75 84 84 93 73 57 59 70
WIND DIR         SW  S  S SW SW SW SW SW SW SW  S  S  S SW SW SW SW  S  S SW SW
WIND SPD          1  5 10 10  6  4  3  2  2  3  5  5  3  2  2  2  2  4  8  6  5
CLOUDS           B1 B1 SC B1 B1 B1 SC SC B1 B1 B1 B1 B1 SC SC B1 B2 B2 B1 B1 B2
CLOUDS(%)        61 54 31 65 69 59 48 39 61 58 53 56 61 44 50 64 78 77 68 68 83
VSBY              2 10 10 10 10  9  6 10  9 10 10 10 10                        
POP 12HR                     30          20          50          50          70
RAIN SHWRS                SC IS             SC SC SC SC SC SC SC SC NM NM NM NM
TSTMS                     SC IS                SC SC SC SC          IS IS IS SC
MIX HGT          <1  3  6  4 <1 <1 <1 <1 <1  3  5  2 <1 <1 <1 <1  1  3  6  3 <1
T WIND DIR       SW SW SW  S SW SW SW SW SW SW SW SW  W SW  W NW  N  S  S  S SW
T WIND SPD        4 14 18 21 11  6  4  3  3  9 13 16  1  3  3  4  2 12 20 26 12
DISPERSION                   PR VP VP VP             VP VP VP VP             PR
ADI               5 46130 82  8  5  2  2  3 31 57 46  1  2  2  2  4 41 92 92  8
MAX LVORI         5  1  1  1  3  3  4  5  5  1  1  1  4  4  5  5  6  3  1  1  3
STABILITY         B  C  B  C  E  E  F  G  A  A  C  C  F  F  F  F  B  C  C  C  E
CEILING              None  3100  None  None 22000  None  None  2200   700  3100
STA PRES            27.99 27.91 27.92 27.92 27.92 27.89 27.87 27.87 27.86 27.78


Date          Sun 05/04/25Mon 05/05/25Tue 05/06/25Wed 05/07/25
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       54      68      50      69      50      69      52      72
TEMP          58 55 67 61 53 53 67 64 54 54 67 63 55 56 69 65
DEWPT         53 53 49 47 47 48 48 48 47 48 50 49 48 51 53 52
RH            83 93 52 60 80 83 50 56 77 80 54 60 77 83 57 63
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    B2 B2 SC SC SC SC SC SC SC SC SC SC SC SC B1 SC
POP 12HR           70      50      30      40      20      30      20      30
RAIN SHWRS    NM NM SC SC SC SC SC SC IS IS SC SC IS    IS SC
TSTMS         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

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