McKinney, Texas Weather Conditions

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Current Conditions

  • 84°
  • Scattered Clouds
  • Wind: Calm
  • Humidity: 63%
  • Visibility: 10.0 miles
  • Dew Point: 70°
  • Pressure: 30.11 in. -
  • Heat Index: 88

Nowcast

  • Now as of 11:45 am CDT on September 16, 2014

    Around noon...isolated showers continued near and south of a Goldthwaite to Hillsboro to Corsicana line. This activity was moving very slowly towards the northeast at around 5 to 10 mph. Elsewhere...skies ranged from partly to mostly cloudy with temperatures in the low to mid 80s. Through early afternoon...isolated showers and perhaps a rumble of thunder or two will be possible...with the best chances for more numerous activity along and south of the Interstate 20 corridor. Rainfall amounts should generally remain light...with totals of less than one quarter of an inch. Otherwise...expect partly to at times mostly cloudy skies...with temperatures slowly climbing through the mid 80s.

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Next 12 Hours

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10  pm
1  am
Chance of a Thunderstorm
Chance of T-storms
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Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
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81°
88°
84°
75°
77°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Tuesday
  • Chance of a Thunderstorm
  • High: 90 °
  • Low: 70 °
  • Chance of T-Storms
  • Wednesday
  • Chance of a Thunderstorm
  • High: 91 °
  • Low: 70 °
  • Chance of a Thunderstorm
  • Thursday
  • Chance of a Thunderstorm
  • High: 84 °
  • Low: 68 °
  • Chance of T-Storms
  • Friday
  • Mostly Cloudy
  • High: 86 °
  • Low: 68 °
  • Mostly Cloudy
  • Saturday
  • Mostly Cloudy
  • High: 84 °
  • Low: 68 °
  • Mostly Cloudy

Forecast for McKinney, Texas

Updated: 10:00 AM CDT on September 16, 2014

  • Tuesday

    Overcast with a chance of a thunderstorm and a chance of rain. High of 90F. Winds less than 5 mph. Chance of rain 40% with rainfall amounts near 0.2 in. possible.

  • Tuesday Night

    Partly cloudy with a chance of a thunderstorm and a chance of rain. Low of 70F. Winds less than 5 mph. Chance of rain 20%.

  • Wednesday

    Partly cloudy with a chance of a thunderstorm and a chance of rain. High of 91F. Winds from the SSE at 5 to 10 mph. Chance of rain 20%.

  • Wednesday Night

    Overcast with a chance of a thunderstorm and a chance of rain. Low of 70F. Winds from the SSE at 5 to 10 mph. Chance of rain 20%.

  • Thursday

    Mostly cloudy with a chance of a thunderstorm and a chance of rain. High of 84F. Winds from the SE at 5 to 10 mph. Chance of rain 30%.

  • Thursday Night

    Overcast in the evening, then mostly cloudy. Fog overnight. Low of 68F. Winds from the SSE at 5 to 10 mph.

  • Friday

    Mostly cloudy. Fog early. High of 86F. Winds from the SE at 5 to 15 mph.

  • Friday Night

    Overcast. Low of 68F. Winds from the SSE at 5 to 10 mph.

  • Saturday

    Overcast in the morning, then mostly cloudy. Fog early. High of 84F. Winds from the South at 10 to 15 mph.

  • Saturday Night

    Overcast with a chance of a thunderstorm. Fog overnight. Low of 68F. Winds from the South at 5 to 10 mph shifting to the NNW after midnight. Chance of rain 70% with rainfall amounts near 0.5 in. possible.

  • Sunday

    Mostly cloudy. High of 84F. Winds from the North at 10 to 15 mph.

  • Sunday Night

    Mostly cloudy. Low of 66F. Winds from the NNE at 5 to 10 mph.

  • Monday

    Overcast. High of 81F. Winds from the NNE at 5 to 10 mph.

  • Monday Night

    Mostly cloudy. Low of 54F. Winds from the NE at 5 to 10 mph.

  • Tuesday

    Mostly cloudy. High of 77F. Winds from the ENE at 5 to 10 mph.

  • Tuesday Night

    Overcast. Low of 55F. Winds from the NE at 5 to 10 mph.

  • Wednesday

    Mostly cloudy. High of 75F. Winds from the NE at 5 to 10 mph.

  • Wednesday Night

    Partly cloudy. Low of 55F. Winds less than 5 mph.

  • Thursday

    Clear. High of 75F. Winds less than 5 mph.

  • Thursday Night

    Clear. Low of 57F. Winds less than 5 mph.

  • Friday

    Clear. High of 77F. Winds less than 5 mph.

  • Friday Night

    Clear. Low of 57F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Eldorado Ridge, McKinney, TX

Updated: 12:26 PM CDT

Temperature: 91.8 °F Dew Point: 70 °F Humidity: 50% Wind: SSE at 2.3 mph Pressure: 30.11 in Hourly Precipitation: 0.00 in Heat Index: 98 °F Graphs

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

Updated: 12:26 PM CDT

Temperature: 84.7 °F Dew Point: 71 °F Humidity: 64% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Quest Addition, McKinney, TX

Updated: 12:25 PM CDT

Temperature: 83.2 °F Dew Point: 71 °F Humidity: 67% Wind: East at 2.0 mph Pressure: 30.11 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Gwendola Drive - Northwood Park, McKinney, TX

Updated: 12:26 PM CDT

Temperature: 90.1 °F Dew Point: 64 °F Humidity: 42% Wind: Calm Pressure: 29.38 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Shady Glen - McKinney, McKinney, TX

Updated: 12:20 PM CDT

Temperature: 88.0 °F Dew Point: 71 °F Humidity: 58% Wind: ESE at 4.7 mph Pressure: 30.00 in Hourly Precipitation: - Heat Index: 94 °F Graphs

Location: JLD Weather Center, McKinney, TX

Updated: 12:26 PM CDT

Temperature: 86.3 °F Dew Point: 70 °F Humidity: 59% Wind: ESE at 2.0 mph Pressure: 30.09 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Vista of Eldorado, McKinney, TX

Updated: 12:26 PM CDT

Temperature: 85.4 °F Dew Point: 74 °F Humidity: 68% Wind: Calm Pressure: 30.17 in Hourly Precipitation: 0.00 in Heat Index: 93 °F Graphs

Location: Bridlegate, Fairview, TX

Updated: 12:26 PM CDT

Temperature: 86.0 °F Dew Point: 73 °F Humidity: 65% Wind: East at 4.0 mph Pressure: 30.08 in Hourly Precipitation: 0.00 in Heat Index: 93 °F Graphs

Location: Summer Hill Farms, Fairview, TX

Updated: 12:26 PM CDT

Temperature: 85.8 °F Dew Point: - Humidity: 84% Wind: North at - Pressure: - Hourly Precipitation: 0.00 in Heat Index: 101 °F Graphs

Location: Stacy Ridge Estates 2, Allen, TX

Updated: 12:24 PM CDT

Temperature: 87.4 °F Dew Point: 74 °F Humidity: 65% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 96 °F Graphs

Location: Chanceller Creek, McKinney, TX

Updated: 12:26 PM CDT

Temperature: 87.1 °F Dew Point: 73 °F Humidity: 63% Wind: Calm Pressure: 29.98 in Hourly Precipitation: 0.00 in Heat Index: 95 °F Graphs

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

Updated: 12:26 PM CDT

Temperature: 84.7 °F Dew Point: 72 °F Humidity: 65% Wind: ESE at 4.0 mph Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Thompson Springs, Fairview, TX

Updated: 12:26 PM CDT

Temperature: 86.8 °F Dew Point: 74 °F Humidity: 65% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 95 °F Graphs

Location: Knightsbridge, McKinney, TX

Updated: 12:26 PM CDT

Temperature: 82.9 °F Dew Point: 70 °F Humidity: 66% Wind: Calm Pressure: 30.13 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Briar Ridge, McKinney, TX

Updated: 12:26 PM CDT

Temperature: 84.7 °F Dew Point: 73 °F Humidity: 68% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Skywatch McKinney, Mckinney, TX

Updated: 12:26 PM CDT

Temperature: 85.0 °F Dew Point: 72 °F Humidity: 64% Wind: East at 6.3 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Star Creek, Allen, TX

Updated: 12:17 PM CDT

Temperature: 90.2 °F Dew Point: 73 °F Humidity: 57% Wind: Calm Pressure: 30.09 in Hourly Precipitation: 0.00 in Heat Index: 98 °F Graphs

Location: Allen, TX

Updated: 12:25 PM CDT

Temperature: 86.5 °F Dew Point: 72 °F Humidity: 63% Wind: East at 4.0 mph Pressure: 30.09 in Hourly Precipitation: 0.00 in Heat Index: 93 °F Graphs

Location: Country Meadow, Allen, TX

Updated: 12:26 PM CDT

Temperature: 87.1 °F Dew Point: 73 °F Humidity: 62% Wind: ESE at 5.3 mph Pressure: 30.09 in Hourly Precipitation: 0.00 in Heat Index: 94 °F Graphs

Location: Morningside, Allen, TX

Updated: 12:26 PM CDT

Temperature: 85.5 °F Dew Point: 71 °F Humidity: 63% Wind: NNE at 2.9 mph Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

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

Updated: 12:19 PM CDT

Temperature: 86.9 °F Dew Point: 72 °F Humidity: 62% Wind: NNW at 2.7 mph Pressure: 30.08 in Hourly Precipitation: - Heat Index: 94 °F Graphs

Location: Fountain Gate Park, Allen, TX

Updated: 12:26 PM CDT

Temperature: 87.0 °F Dew Point: 72 °F Humidity: 61% Wind: Calm Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: 93 °F Graphs

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

Updated: 12:21 PM CDT

Temperature: 84.7 °F Dew Point: 72 °F Humidity: 66% Wind: ESE at 6.0 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Waterford Parks / Phase II, Allen, TX

Updated: 12:26 PM CDT

Temperature: 86.6 °F Dew Point: 72 °F Humidity: 63% Wind: SSE at 4.0 mph Pressure: 30.05 in Hourly Precipitation: 0.00 in Heat Index: 93 °F Graphs

Location: Craig Ranch, McKinney, TX

Updated: 12:24 PM CDT

Temperature: 84.7 °F Dew Point: 72 °F Humidity: 65% Wind: West at 1.1 mph Pressure: 30.02 in Hourly Precipitation: - Heat Index: 90 °F Graphs

Location: Parker Lake Estates, Allen, TX

Updated: 12:07 PM CDT

Temperature: 84.6 °F Dew Point: 72 °F Humidity: 65% Wind: Calm Pressure: 29.42 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

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

Updated: 12:26 PM CDT

Temperature: 89.1 °F Dew Point: - Humidity: - Wind: NE at 2.0 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Heritage Park (W5JOU), Allen, TX

Updated: 12:26 PM CDT

Temperature: 85.3 °F Dew Point: 38 °F Humidity: 19% Wind: SE at 3.0 mph Pressure: 29.63 in Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

Location: Coyote Station, Allen, TX

Updated: 12:25 PM CDT

Temperature: 93.3 °F Dew Point: 69 °F Humidity: 45% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Heat Index: 98 °F Graphs

Location: Glendover, Allen, TX

Updated: 12:12 PM CDT

Temperature: 88.5 °F Dew Point: 74 °F Humidity: 62% Wind: SE at 2.7 mph Pressure: 29.83 in Hourly Precipitation: - Heat Index: 97 °F Graphs

Location: McKinney, TX

Updated: 12:19 PM CDT

Temperature: 83.4 °F Dew Point: 74 °F Humidity: 73% Wind: Calm Pressure: 30.07 in Hourly Precipitation: - Heat Index: 90 °F Graphs

Location: Estates of Virginia Ridge, McKinney, TX

Updated: 12:25 PM CDT

Temperature: 86.9 °F Dew Point: 72 °F Humidity: 61% Wind: SE at 2.0 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: 93 °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 
1107 am CDT Tuesday Sep 16 2014 


Update... 
the weather across the region today will remain relatively quiet. 
The 12z forward radiosonde observation still shows a pretty moist sounding which is the 
same as the soundings that we have seen for the last few days. 
With no major sources of lift /only a weak short wave embedded in 
the upper flow/ and no significant surface boundaries...we are 
counting on diurnal heating for isolated to scattered showers to 
develop today. Have lowered the rain chances to isolated across 
the north and slight chance across the south for the rest of 
today. Rainfall amounts will be light...with most sites that 
receive rain picking up less than 1/10th of inch. Temperatures 
will be dependent on how many breaks we see in the middle and high 
level clouds. Most areas should reach the middle 80s to around 90 
degrees. 




58 


&& 


Aviation... 
/issued 642 am CDT Tuesday Sep 16 2014/ 
the 1200 UTC terminal forecasts will feature weather conditions 
similar to those observed across the area for the past two days. 
Rich middle and high level moisture remains in place...but only 
subtle and weak forcing for ascent is forecast. The sensible weather 
that will result will be persistent middle cloud ceilings with a 
chance for a few light rain showers. 


VFR ceilings at or above 10 kft will be forecast at all taf sites 
for the next 24 hours. Will only forecast vcsh at kact this 
afternoon where a slightly greater coverage of showers will exist 
later today. Any showers that occur will not impact visibility or 
ceiling. For all sites...expect east or southeast surface flow to 
continue with speeds under 10 kts. /09 




&& 






Previous discussion... /issued 347 am CDT Tuesday Sep 16 2014/ 
the combination of elevated moisture associated with Tropical 
Storm Odile and weak short wave energy embedded in northwest flow 
aloft will bring a chance of showers to North Texas today. The 
best chances for measurable rainfall will be across the southern 
zones where moisture and lift will be the most favorable. Lapse 
rates will remain nearly moist adiabatic through the day and 
thunder appears unlikely for the most part. However...a brief 
storm or two is not completely out of the question across the 
southern zones. Earlier thinking was that a weak cold front would 
move into North Texas today and provide an additional source of 
lift for precipitation but current surface analysis shows only very 
weak pressure rises behind the approaching front. Therefore...it 
is likely that the front will remain north of the Red River today 
so we will reduce the chances of measurable precipitation across 
the northern half of the region to 20 percent. 


The upper pattern will not change much tonight through Thursday with 
high pressure across the west and a long wave trough in the east. All 
models continue to indicate that a series of shortwaves will move 
across The Hill Country and the southern portions of North Texas 
Wednesday through Thursday and bring scattered rain and 
thunderstorms. It appears that the best chances for appreciable 
rainfall will remain across The Hill Country but we will carry 
chance probability of precipitation across about the southern half of the forecast area 
Wednesday through Thursday. 


Rain chances will decrease Thursday night as the short wave energy 
moves southeast and upper level high pressure builds across the 
state. Large scale subsidence underneath the area of high pressure 
should dominate the region Friday through Saturday and keep rain 
chances low. 


Some changes are on the way late in the weekend through early next 
week as an upper level trough moves east across the middle of the 
nation. While most of the energy associated with this system will 
remain north of the region....the passage of the trough axis will 
allow a cold front to move south across the plains and reach North 
Texas Saturday night. The GFS...Canadian and European model (ecmwf) solutions are 
in decent agreement on the timing of the cold front and the 
associated precipitation...although the European model (ecmwf) is a bit faster 
with the front. We have decided to raise probability of precipitation slightly for Sunday 
due to the overall model agreement. Much drier air will filter in 
behind the front Sunday night and this air will remain in place 
through at least the middle of next week. 


Temperatures through the weekend will be near normal for this time 
of year with highs in the 80s to lower 90s and lows in the upper 
60s and 70s. Temperatures on Sunday and Monday should be a bit 
cooler with lows from the upper 50s to the upper 60s and highs 
generally in the 80s. 


79 






&& 




Preliminary point temps/pops... 
Dallas-ft. Worth, Texas 90 72 90 75 91 / 10 20 20 20 20 
Waco, Texas 88 71 89 74 88 / 20 20 30 30 40 
Paris, Texas 86 67 88 71 89 / 10 20 20 20 20 
Denton, Texas 89 69 91 72 90 / 10 20 20 20 20 
McKinney, Texas 89 70 89 71 91 / 10 20 20 20 20 
Dallas, Texas 89 74 91 75 90 / 10 20 20 20 20 
Terrell, Texas 89 70 89 73 90 / 10 20 20 20 20 
Corsicana, Texas 89 70 89 74 89 / 20 20 30 30 30 
Temple, Texas 87 71 86 73 87 / 20 20 30 30 40 
Mineral Wells, Texas 87 71 90 71 89 / 10 20 20 20 30 


&& 


Forward watches/warnings/advisories... 
none. 


&& 


$$ 


58/58 



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