McKinney, Texas Weather Conditions

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Current Conditions

  • 80°
  • Mostly Cloudy
  • Wind: South 15 mph
  • Humidity: 79%
  • Visibility: 10.0 miles
  • Dew Point: 73°
  • Pressure: 29.95 in. +
  • Heat Index: 84

Nowcast

  • Now as of 8:24 am CDT on August 20, 2014

    Scattered showers have developed along a line from Decatur to Gainesville. These showers are moving to the north northeast at 20 to 30 mph and are capable of producing brief moderate rain. Additional showers will be possible this morning...primarily north of Interstate 20. Elsewhere... skies will remain partly to mostly cloudy through the morning. Temperatures are in the low 80s and upper 70s and will climb into the 90s by this afternoon.

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Next 12 Hours

10  am
1  pm
4  pm
7  pm
10  pm
Partly Cloudy
Partly Cloudy
Clear
Clear
Clear
Clear
Partly Cloudy
Partly Cloudy
Clear
Clear
84°
86°
90°
90°
82°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Wednesday
  • Partly Cloudy
  • High: 95 °
  • Low: 75 °
  • Partly Cloudy
  • Thursday
  • Partly Cloudy
  • High: 95 °
  • Low: 75 °
  • Partly Cloudy
  • Friday
  • Clear
  • High: 95 °
  • Low: 75 °
  • Clear
  • Saturday
  • Partly Cloudy
  • High: 99 °
  • Low: 75 °
  • Partly Cloudy
  • Sunday
  • Partly Cloudy
  • High: 93 °
  • Low: 73 °
  • Partly Cloudy

Forecast for McKinney, Texas

Updated: 10:00 AM CDT on August 19, 2014

  • Wednesday

    Partly cloudy in the morning, then clear. High of 95F. Winds from the South at 10 to 15 mph.

  • Wednesday Night

    Partly cloudy in the evening, then clear. Low of 75F. Winds from the SSE at 10 to 15 mph.

  • Thursday

    Partly cloudy. High of 95F. Breezy. Winds from the South at 15 to 20 mph.

  • Thursday Night

    Clear. Low of 75F. Winds from the South at 10 to 15 mph.

  • Friday

    Clear. High of 95F. Winds from the SSW at 10 to 15 mph.

  • Friday Night

    Clear. Low of 75F. Winds from the South at 5 to 10 mph.

  • Saturday

    Clear. High of 99F. Winds from the South at 5 to 10 mph.

  • Saturday Night

    Clear. Low of 75F. Winds from the SSE at 5 to 10 mph.

  • Sunday

    Clear. High of 93F. Winds from the South at 5 to 10 mph.

  • Sunday Night

    Clear. Low of 73F. Winds from the SSE at 5 to 10 mph.

  • Monday

    Clear. High of 95F. Winds from the South at 5 to 10 mph.

  • Monday Night

    Clear. Low of 73F. Winds from the South at 5 to 10 mph.

  • Tuesday

    Clear. High of 95F. Winds from the South at 5 to 15 mph.

  • Tuesday Night

    Clear. Low of 73F. Winds from the ESE at 5 to 10 mph.

  • Wednesday

    Clear. High of 95F. Winds less than 5 mph.

  • Wednesday Night

    Clear. Low of 72F. Winds less than 5 mph.

  • Thursday

    Clear. High of 93F. Winds less than 5 mph.

  • Thursday Night

    Clear with a chance of a thunderstorm. Low of 70F. Winds less than 5 mph. Chance of rain 40%.

  • Friday

    Partly cloudy. High of 91F. Winds less than 5 mph.

  • Friday Night

    Clear. Low of 70F. Winds from the ENE at 5 to 10 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Tim Warden, McKinney, TX

Updated: 9:37 AM CDT

Temperature: 82.0 °F Dew Point: 74 °F Humidity: 78% Wind: Calm Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Eldorado Ridge, McKinney, TX

Updated: 9:36 AM CDT

Temperature: 83.1 °F Dew Point: 72 °F Humidity: 70% Wind: SSW at 9.1 mph Pressure: 29.99 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

Location: K5BL LIVE WX - El Fenix, McKinney, TX

Updated: 9:36 AM CDT

Temperature: 84.6 °F Dew Point: 74 °F Humidity: 70% Wind: Calm Pressure: 29.97 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Quest Addition, McKinney, TX

Updated: 9:35 AM CDT

Temperature: 82.2 °F Dew Point: 74 °F Humidity: 77% Wind: SE at 7.0 mph Pressure: 29.97 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

Location: Oakwood Estates, Fairview, TX

Updated: 9:36 AM CDT

Temperature: 81.7 °F Dew Point: 72 °F Humidity: 72% Wind: Calm Pressure: 30.05 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: Shady Glen - McKinney, McKinney, TX

Updated: 9:27 AM CDT

Temperature: 83.5 °F Dew Point: 71 °F Humidity: 67% Wind: South at 3.7 mph Pressure: 29.86 in Hourly Precipitation: - Heat Index: 89 °F Graphs

Location: JLD Weather Center, McKinney, TX

Updated: 9:36 AM CDT

Temperature: 82.0 °F Dew Point: 74 °F Humidity: 76% Wind: SW at 13.0 mph Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Vista of Eldorado, McKinney, TX

Updated: 9:37 AM CDT

Temperature: 81.8 °F Dew Point: 75 °F Humidity: 79% Wind: SW at 16.0 mph Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Bridlegate, Fairview, TX

Updated: 9:26 AM CDT

Temperature: 81.9 °F Dew Point: 74 °F Humidity: 77% Wind: SSE at 1.0 mph Pressure: 29.94 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Summer Hill Farms, Fairview, TX

Updated: 9:37 AM CDT

Temperature: 83.4 °F Dew Point: - Humidity: 100% Wind: North at - Pressure: - Hourly Precipitation: 0.00 in Heat Index: 100 °F Graphs

Location: Stacy Ridge Estates 2, Allen, TX

Updated: 9:35 AM CDT

Temperature: 83.2 °F Dew Point: 75 °F Humidity: 76% Wind: Calm Pressure: 29.88 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Chanceller Creek, McKinney, TX

Updated: 9:36 AM CDT

Temperature: 83.5 °F Dew Point: 75 °F Humidity: 75% Wind: Calm Pressure: 29.85 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Amherst Estates - Lucas, TX, Allen, TX

Updated: 9:37 AM CDT

Temperature: 82.4 °F Dew Point: 76 °F Humidity: 80% Wind: SSW at 4.0 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Thompson Springs, Fairview, TX

Updated: 9:37 AM CDT

Temperature: 82.4 °F Dew Point: 75 °F Humidity: 79% Wind: Calm Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Knightsbridge, McKinney, TX

Updated: 9:37 AM CDT

Temperature: 81.5 °F Dew Point: 72 °F Humidity: 74% Wind: Calm Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: Briar Ridge, McKinney, TX

Updated: 9:26 AM CDT

Temperature: 81.0 °F Dew Point: 74 °F Humidity: 79% Wind: ESE at 2.0 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: Timber Ridge, Mckinney, TX

Updated: 9:37 AM CDT

Temperature: 82.8 °F Dew Point: 76 °F Humidity: 81% Wind: SSW at 4.0 mph Pressure: 29.89 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Lucas Creek, Lucas, TX

Updated: 9:30 AM CDT

Temperature: 83.8 °F Dew Point: 76 °F Humidity: 76% Wind: South at 6.5 mph Pressure: 29.41 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Skywatch McKinney, Mckinney, TX

Updated: 9:37 AM CDT

Temperature: 83.4 °F Dew Point: 74 °F Humidity: 73% Wind: SSW at 13.5 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Star Creek, Allen, TX

Updated: 9:29 AM CDT

Temperature: 84.2 °F Dew Point: 75 °F Humidity: 73% Wind: ESE at 1.0 mph Pressure: 29.94 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Allen, TX

Updated: 9:35 AM CDT

Temperature: 83.1 °F Dew Point: 76 °F Humidity: 78% Wind: East at 3.0 mph Pressure: 29.97 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Country Meadow, Allen, TX

Updated: 9:36 AM CDT

Temperature: 83.5 °F Dew Point: 74 °F Humidity: 74% Wind: SSE at 4.7 mph Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Mckinney, TX

Updated: 9:26 AM CDT

Temperature: 84.2 °F Dew Point: 73 °F Humidity: 70% Wind: NE at 9.4 mph Pressure: 29.82 in Hourly Precipitation: - Heat Index: 91 °F Graphs

Location: Morningside, Allen, TX

Updated: 9:37 AM CDT

Temperature: 82.8 °F Dew Point: 74 °F Humidity: 74% Wind: SSW at 1.3 mph Pressure: 29.89 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

Location: country club/main - ke5fco, Allen, TX

Updated: 9:32 AM CDT

Temperature: 83.3 °F Dew Point: 76 °F Humidity: 78% Wind: SSW at 6.8 mph Pressure: 29.95 in Hourly Precipitation: - Heat Index: 91 °F Graphs

Location: Fountain Gate Park, Allen, TX

Updated: 9:37 AM CDT

Temperature: 83.3 °F Dew Point: 74 °F Humidity: 74% Wind: SSE at 5.0 mph Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Chandler Estates, Lucas, TX, O2 Ranch, TX

Updated: 9:22 AM CDT

Temperature: 81.9 °F Dew Point: 75 °F Humidity: 79% Wind: SW at 2.0 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Waterford Parks / Phase II, Allen, TX

Updated: 9:37 AM CDT

Temperature: 81.8 °F Dew Point: 74 °F Humidity: 78% Wind: SSE at 10.0 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Craig Ranch, McKinney, TX

Updated: 9:30 AM CDT

Temperature: 82.2 °F Dew Point: 71 °F Humidity: 69% Wind: South at 6.3 mph Pressure: 29.88 in Hourly Precipitation: - Heat Index: 87 °F Graphs

Location: Parker Lake Estates, Allen, TX

Updated: 9:25 AM CDT

Temperature: 81.3 °F Dew Point: 74 °F Humidity: 79% Wind: SSE at 3.0 mph Pressure: 29.29 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Blue Iguana @ Bethany/Jupiter, Allen, TX

Updated: 9:36 AM CDT

Temperature: 85.6 °F Dew Point: - Humidity: - Wind: South at 2.0 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Heritage Park (W5JOU), Allen, TX

Updated: 9:37 AM CDT

Temperature: 83.7 °F Dew Point: 41 °F Humidity: 22% Wind: South at 8.0 mph Pressure: 29.51 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Coyote Station, Allen, TX

Updated: 9:35 AM CDT

Temperature: 85.8 °F Dew Point: 72 °F Humidity: 64% Wind: North at 3.1 mph Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Twin Creeks II, Allen, TX

Updated: 9:37 AM CDT

Temperature: 85.5 °F Dew Point: 75 °F Humidity: 71% Wind: SE at 5.4 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 94 °F Graphs

Location: Glendover, Allen, TX

Updated: 9:13 AM CDT

Temperature: 81.7 °F Dew Point: 74 °F Humidity: 78% Wind: SSW at 3.7 mph Pressure: 29.69 in Hourly Precipitation: - Heat Index: 88 °F Graphs

Location: McKinney, TX

Updated: 9:25 AM CDT

Temperature: 79.6 °F Dew Point: 74 °F Humidity: 84% Wind: Calm Pressure: 29.93 in Hourly Precipitation: - Heat Index: 84 °F Graphs

Location: Estates of Virginia Ridge, McKinney, TX

Updated: 9:35 AM CDT

Temperature: 81.1 °F Dew Point: 72 °F Humidity: 75% Wind: SSW at 5.0 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion...updated 
National Weather Service Fort Worth Texas 
655 am CDT Wednesday Aug 20 2014 


Aviation... 
/12z tafs/ 


MVFR ceilings...especially at Waco this morning...then all sites 
Thursday morning to be problematic. Otherwise no major concerns. 


A middle level disturbance will continue weakening as it lifts 
northeast of the Red River this a.M. A 30 kt+ low level jet to the east of 
this feature will continue to support showers to the north of dfw 
this morning and will leave vcsh out for now. MVFR ceilings streaming 
north over The Hill Country and central Texas could briefly impact 
Waco by middle morning and will carry a tempo group. South winds 
around 10 kts this morning will become southeast around 15 kts 
this afternoon and should continue through this evening. 


A slightly stronger low level jet between 30-40 kts will develop late 
tonight and should allow for MVFR ceilings to push into the I-20 
corridor after sunrise Thursday. Have decided to not mention MVFR 
at dfw area airports for Thursday morning until timing becomes 
better define. I will advertise MVFR ceilings into Waco right before 
sunrise. South-southeast winds 10-15 kts will continue Thursday 
with gusts to 20 kts possible by afternoon. 


05/ 


&& 




Previous discussion... /issued 419 am CDT Wednesday Aug 20 2014/ 
a few light showers north of the I-20 corridor are associated with 
an exiting middle-level impulse. Much of what appears on radar is middle 
cloud within this area of lift...but a few sprinkles are likely 
reaching the ground. This activity will gradually shift northward 
into Oklahoma this morning. 


While the exiting disturbance might suggest subsidence will 
dominate today...synoptic scale vertical motion will be rather 
neutral today. As skies clear...and the August sun heats the 
surface layer...the lack of inhibition could allow for another 
round of isolated/disorganized convection. However...intensifying 
Lee troughing will result in southerly winds near or in excess of 
15 miles per hour...which should assure any lingering outflow boundaries are 
effectively obliterated. The only area of concern will be in the 
far southeast...where temperatures in the middle to upper 90s will 
coincide with dew points near 70f. But even with minimal 
inhibition...this instability is unlikely to be realized unless 
outflow from sea breeze activity upstream is able to mechanically 
lift the surface layer. 


By Thursday...a strengthening ridge over the southeastern states 
will begin to impinge on Texas. Its influence will persist into 
next week. But with the rather Ordinary Summer ridge centered well 
to our east...mid-level heights will not be extraordinary for 
August. Afternoon highs will still exceed normal values...climbing 
into the upper 90s to near 100 degrees. Mitigating factors for the 
heat will be (1) a steady southerly breeze due to persistent Lee 
troughing and (2) dew points mixing out into the 50s west of I-35. 


Extended guidance suggests the upper tropical trough responsible 
for the unsettled weather in the northwestern Gulf of Mexico could 
ride over the western periphery of the middle-level ridge this 
weekend. It looks as though large-scale subsidence beneath it 
should effectively stifle it...but with little else to keep US 
entertained...it may bear watching. The next legitimate chance 
for rain will be Monday or Tuesday when the low-level wind field 
weakens and the sea breeze may be able to reactivate. For now... 
only introduced hidden 10 probability of precipitation. 


25 


&& 






Preliminary point temps/pops... 
Dallas-ft. Worth, Texas 98 77 99 77 99 / 5 0 0 0 0 
Waco, Texas 99 76 99 76 99 / 5 5 0 0 0 
Paris, Texas 97 74 97 74 97 / 10 0 0 0 0 
Denton, Texas 98 76 99 76 99 / 10 0 0 0 0 
McKinney, Texas 96 75 97 75 97 / 10 0 0 0 0 
Dallas, Texas 97 77 98 78 98 / 5 0 0 0 0 
Terrell, Texas 97 75 97 75 97 / 5 5 0 0 0 
Corsicana, Texas 97 74 98 75 98 / 5 5 0 0 0 
Temple, Texas 98 75 98 75 98 / 5 5 0 0 0 
Mineral Wells, Texas 98 73 98 73 100 / 5 0 0 0 0 


&& 


Forward watches/warnings/advisories... 
none. 


&& 


$$ 


05/25 



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