National Weather Service United States Department of Commerce

Severe Weather and Heavy Rainfall in the Midwest and Desert Southwest; Mid-Summer Heat Continues

Severe thunderstorm and heavy rainfall are possible in the Midwest into the Central Appalachians and the Desert Southwest early this week. Storms are also expected in parts of the northern Plains today. Fire weather and air quality concerns will persist across portions of the West. Mid-summer heat will continue across much of the CONUS this week, especially in the the south-central High Plains. Read More >

Print This Forecast (Printer-Friendly)

EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
531 PM EDT Mon Aug 10 2026

NCZ003-110800-
RAWS 310301
36.48N  80.86W Elev. 1300 ft
531 PM EDT Mon Aug 10 2026

Date           08/10/26      Tue 08/11/26            Wed 08/12/26            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                 70          89          70          89          69
TEMP             80 76 74 72 73 81 86 87 81 76 74 72 73 83 88 87 80 74 71 70 72
DEWPT            71 69 68 67 68 71 71 71 72 70 69 69 70 73 72 72 72 71 69 69 70
MIN/MAX RH                   90          58          94          59          97
RH               74 79 82 84 84 72 61 59 74 82 84 90 90 72 59 61 77 90 93 97 93
WIND DIR          W NW  W NW  W NW NW NW  W NW NW  W NW NW  W  W  W  W NW NW NW
WIND SPD          4  5  4  6  4  6  6  4  2  2  2  4  4  5  5  4  2  2  1  2  2
CLOUDS           SC B1 SC B2 SC SC SC SC SC SC SC B1 B2 B1 SC SC SC SC SC SC B1
CLOUDS(%)        45 64 42 73 36 27 48 47 43 48 28 66 75 59 45 44 39 45 43 40 51
VSBY             10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10            
POP 12HR                     20          20          20          20          10
RAIN SHWRS       IS                IS IS                   IS IS               
TSTMS            IS                IS IS                   IS IS               
MIX HGT          <1 <1 <1 <1 <1  3  5  3 <1 <1 <1 <1 <1  2  4  4 <1            
T WIND DIR       SW NW  N NW NW NW  W NW  W  W  W NW  W NW  W NW SW            
T WIND SPD        4  3 17  8 21 12  9 13  2  3  3  9  4 14 14  5  1            
DISPERSION       VP PR VP PR             VP VP VP VP             VP VP VP VP   
ADI               2  2 12  5 21 49 51 52  1  2  2  6  5 39 78 28  1            
MAX LVORI         3  4  4  5  4  3  1  1  3  5  5  5  6  3  1  2  4            
STABILITY         G  E  E  E  A  B  B  A  F  F  G  E  B  C  A  A  G            
CEILING              None  None  None  None  None  6200  6600  None  None      
STA PRES            28.20 28.17 28.17 28.10 28.10 28.08 28.07 28.02            


Date           08/13Fri 08/14/26Sat 08/15/26Sun 08/16/26Mon 08/17/26
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       89      71      89      70      85      69      89      70      90
TEMP          87 84 73 73 87 82 73 72 83 79 72 71 86 82 73 72 87 82
DEWPT         73 74 71 71 74 74 71 70 73 73 70 70 73 73 70 70 72 72
RH            63 72 93 93 65 77 93 93 72 82 93 97 65 74 90 93 61 72
WIND SPD          <15     <15     <15     <15     <15     <15     <15     <15     <15
AVG CLOUDS    SC B1 B1 SC SC B1 B1 B1 B1 B1 SC SC B1 B1 SC SC SC B1
POP 12HR           10       5      30      20      50      20      30      10      30
RAIN SHWRS                   SC IS IS IS SC IS       SC          SC
TSTMS                        SC IS    IS SC IS       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

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