Clayton, MO

6:45 AM CST on February 11, 2012 (GMT -0600)
Elev: 617 ft
Lon: 90.3° W
Lat: 38.6° N
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Tropical Weather: Tropical Cyclone Giovanna (South Indian Ocean) Tropical Cyclone Jasmine (Southern Pacific)
Weather Summary
Weather Underground Forecast for Saturday, February 11, 2012.

Precipitation will spread across the East Coast on Saturday, while more rain and mountain snow showers are anticipated for parts of the West. A trough of low pressure and associated cold front continue moving eastward across the Eastern Valleys into the Eastern Seaboard. Cool temperatures to the north will allow for snow showers to develop across the Northeast and New England, while rain showers are likely over the Mid-Atlantic states. Rain showers over the Southeastern states should wind down in the early morning hours as the tail end of the system pushes offshore early in the day. Expect the New York metropolitan area to see 1 to 3 inches of snow, while the Washington D.C. area will see a messy combination of snow and freezing rain as high temperatures reach into the lower 40s.

Behind this system, a ridge of high pressure continues to build in from the Plains, pushing cold and dry air in from Canada. This allows for plenty of sunshine to spread from the Plains over the Mississippi River Valley and into the Eastern Valleys. Expect the Northern Plains and Upper Midwest to see highs in the teens again, while the Midwest will see highs in the 20s. Strong winds will accompany this system, pushing windchill values below zero in these areas. The Southern Plains will remain in the 40s on Saturday.

Out West, a trough of low pressure pushes a cold front over the Pacific Northwest and continues pulling moisture onshore with it. This will kick up more rain showers with high elevation snow showers likely in the Cascades. The tail end of the frontal boundary will sweep through California, bringing light rain showers to the coasts and interior valleys. Expect light snow showers in the Sierra Nevadas by Saturday evening.
Weather Underground Forecast for Saturday, February 11, 2012.

Precipitation will spread across the East Coast on Saturday, while more rain and mountain snow showers are anticipated for parts of the West. A trough of low pressure and associated cold front continue moving eastward across the Eastern Valleys into the Eastern Seaboard. Cool temperatures to the north will allow for snow showers to develop across the Northeast and New England, while rain showers are likely over the Mid-Atlantic states. Rain showers over the Southeastern states should wind down in the early morning hours as the tail end of the system pushes offshore early in the day. Expect the New York metropolitan area to see 1 to 3 inches of snow, while the Washington D.C. area will see a messy combination of snow and freezing rain as high temperatures reach into the lower 40s.

Behind this system, a ridge of high pressure continues to build in from the Plains, pushing cold and dry air in from Canada. This allows for plenty of sunshine to spread from the Plains over the Mississippi River Valley and into the Eastern Valleys. Expect the Northern Plains and Upper Midwest to see highs in the teens again, while the Midwest will see highs in the 20s. Strong winds will accompany this system, pushing windchill values below zero in these areas. The Southern Plains will remain in the 40s on Saturday.

Out West, a trough of low pressure pushes a cold front over the Pacific Northwest and continues pulling moisture onshore with it. This will kick up more rain showers with high elevation snow showers likely in the Cascades. The tail end of the frontal boundary will sweep through California, bringing light rain showers to the coasts and interior valleys. Expect light snow showers in the Sierra Nevadas by Saturday evening.
Clayton Weather at a Glance
Updated 6:44 AM CST
Weather Station - report
Elevation
554 ft
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Now
Mostly Cloudy
Mostly Cloudy
Temperature
17.4 °F
Feels Like 12 °F
Wind(mph)
3.8
Sunrise / Set
6:57 AM
5:34 PM
Moon
Waning Gibbous
Today
Partly Cloudy 25 °F
Partly Cloudy
Tonight
Clear 11 °F
Clear
Tomorrow
Clear 29 | 22 °F
Clear
Monday
Snow 31 | 29 °F
Snow
100% chance of precipitation
Tuesday
Mostly Cloudy 40 | 29 °F
Mostly Cloudy
Wednesday
Chance of Snow 45 | 34 °F
Chance of Snow
20% chance of precipitation
Today is forecast to be Much Cooler than yesterday.
Conditions
Pressure
30.47 in
Visibility
10.0 miles
Clouds
Mostly Cloudy 2800 ft
Moisture
Humidity
73%
Rainfall
0.00 in
Snow Depth
Not available.
METAR
SPECI KSTL 111211Z 34007KT 10SM BKN028 M08/M13 A3047 RMK AO2 $
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Weather Radio
Temperature
Windchill
12 °F
Dew Point
10 °F
Wind
Speed / Dir
3.8 mph from West
Wind Gust
6.0 mph
Health
UV
0 out of 16
Pollen
.40 out of 12
Pollen Forecast
Ozone
Good
PM2.5
Good
Flu Activity
Regional
View Flu Map
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Regional Forecast for St. Louis
Today
snow Colder. Partly cloudy with scattered snow showers early in the morning...then sunny in the late morning and afternoon. High in the mid 20s. Northwest wind 15 to 20 mph.
Tonight
nt_sunny Clear. Low around 11. Northwest wind 10 to 15 mph. Gusts up to 25 mph in the evening.
Sunday
sunny Sunny. High around 30. Northwest wind around 10 mph.
Sunday Night
nt_partlycloudy Partly cloudy in the evening then becoming mostly cloudy. Low around 20. Light wind in the evening becoming south around 10 mph after midnight.
Monday
chancesnow Snow. Light snow accumulation possible. High in the lower 30s. South wind 10 to 15 mph. Gusts up to 25 mph in the afternoon. Chance of snow near 100 percent.
Monday Night
nt_chancesnow Snow in the evening...then chance of snow after midnight. Light snow accumulation possible. Near steady temperature around 30. Chance of snow near 100 percent.
Tuesday
cloudy Mostly cloudy in the morning then clearing. High in the lower 40s.
Tuesday Night and Wednesday
nt_partlycloudy Partly cloudy. Low in the upper 20s. High in the mid 40s.
Wednesday Night
nt_rain Rain likely. Low in the mid 30s. Chance of rain 60 percent.
Thursday
chancerain Mostly cloudy with a 30 percent chance of rain. High around 50.
Thursday Night and Friday
nt_partlycloudy Partly cloudy. Low in the lower 30s. High in the upper 40s.
Source: NWS at 6:24 am CST on February 11, 2012
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Forecast
View Calendar 7-Day Weather Forecast for 63105
Saturday, 11
Partly Cloudy
25 | 11 °F
Partly Cloudy
Chance of
Precipitation
0%
Sunday, 12
Clear
29 | 22 °F
Clear
Chance of
Precipitation
0%
Monday, 13
Snow
31 | 29 °F
Snow
Chance of
Precipitation
100%
Tuesday, 14
Mostly Cloudy
40 | 29 °F
Mostly Cloudy
Chance of
Precipitation
10%
Wednesday, 15
Chance of Snow
45 | 34 °F
Chance of Snow
Chance of
Precipitation
20%
Thursday, 16
Chance of Rain
49 | 32 °F
Chance of Rain
Chance of
Precipitation
30%
Friday, 17
Partly Cloudy
47 | NA
Partly Cloudy
Chance of
Precipitation
10%
Source: NWS at 6:24 am CST on February 11, 2012
Regional Forecast for St. Louis
Today
snow Colder. Partly cloudy with scattered snow showers early in the morning...then sunny in the late morning and afternoon. High in the mid 20s. Northwest wind 15 to 20 mph.
Tonight
nt_sunny Clear. Low around 11. Northwest wind 10 to 15 mph. Gusts up to 25 mph in the evening.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 18 | 4 22 | 0 20 | 0 16 | 2
Wind 15 mph NNW 15 mph NW 13 mph NW 9 mph NW
Humidity 55% 35% 40% 55%
Chance of Precip. 20% 0% 0% 0%
Cloud Cover 30% 3% 4% 4%
Conditions Partly Cloudy Clear Clear Clear
Sunrise & Sunset
6:57 AM
5:34 PM
Source: NWS at 6:24 am CST on February 11, 2012
Regional Forecast for St. Louis
Sunday
sunny Sunny. High around 30. Northwest wind around 10 mph.
Sunday Night
nt_partlycloudy Partly cloudy in the evening then becoming mostly cloudy. Low around 20. Light wind in the evening becoming south around 10 mph after midnight.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 13 | 2 23 | 0 27 | 4 25 | 7
Wind 6 mph WNW 6 mph WNW 2 mph West 2 mph South
Humidity 60% 35% 38% 47%
Chance of Precip. 0% 0% 0% 10%
Cloud Cover 0% 9% 19% 70%
Conditions Clear Clear Clear Mostly Cloudy
Sunrise & Sunset
6:56 AM
5:35 PM
Source: NWS at 6:24 am CST on February 11, 2012
Regional Forecast for St. Louis
Monday
chancesnow Snow. Light snow accumulation possible. High in the lower 30s. South wind 10 to 15 mph. Gusts up to 25 mph in the afternoon. Chance of snow near 100 percent.
Monday Night
nt_chancesnow Snow in the evening...then chance of snow after midnight. Light snow accumulation possible. Near steady temperature around 30. Chance of snow near 100 percent.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 23 | 9 29 | 22 31 | 27 29 | 27
Wind 6 mph SSE 13 mph South 8 mph South 6 mph South
Humidity 54% 71% 84% 92%
Chance of Precip. 10% 100% 100% 70%
Cloud Cover 95% 100% 100% 99%
Conditions Snow Snow Snow Snow
Sunrise & Sunset
6:55 AM
5:36 PM
Source: NWS at 6:24 am CST on February 11, 2012
Regional Forecast for St. Louis
Tuesday
cloudy Mostly cloudy in the morning then clearing. High in the lower 40s.
Tuesday Night and Wednesday
nt_partlycloudy Partly cloudy. Low in the upper 20s. High in the mid 40s.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 29 | 27 38 | 32 38 | 31 32 | 27
Wind 5 mph SW 6 mph WSW 4 mph WSW 4 mph SW
Humidity 96% 81% 78% 81%
Chance of Precip. 70% 10% 10% 10%
Cloud Cover 95% 63% 31% 42%
Conditions Overcast Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
6:53 AM
5:37 PM
Source: NWS at 6:24 am CST on February 11, 2012
Regional Forecast for St. Louis
Tuesday Night and Wednesday
nt_partlycloudy Partly cloudy. Low in the upper 20s. High in the mid 40s.
Wednesday Night
nt_rain Rain likely. Low in the mid 30s. Chance of rain 60 percent.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 29 | 25 40 | 34 41 | 34 38 | 34
Wind 4 mph South 4 mph South 4 mph ESE 2 mph SSE
Humidity 84% 79% 73% 84%
Chance of Precip. 10% 30% 30% 30%
Cloud Cover 57% 67% 76% 87%
Conditions Chance of Snow Chance of Rain Chance of Rain Chance of Rain
Sunrise & Sunset
6:52 AM
5:38 PM
Source: NWS at 6:24 am CST on February 11, 2012
Regional Forecast for St. Louis
Thursday
chancerain Mostly cloudy with a 30 percent chance of rain. High around 50.
Thursday Night and Friday
nt_partlycloudy Partly cloudy. Low in the lower 30s. High in the upper 40s.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 36 | 34 45 | 38 43 | 36 38 | 32
Wind 2 mph East 5 mph WSW 4 mph NW 5 mph WNW
Humidity 92% 76% 75% 82%
Chance of Precip. 30% 30% 30% 20%
Cloud Cover 82% 72% 61% 53%
Conditions Chance of Rain Chance of Rain Chance of Rain Chance of Rain
Sunrise & Sunset
6:52 AM
5:38 PM
Source: NWS at 6:24 am CST on February 11, 2012
Regional Forecast for St. Louis
Thursday Night and Friday
nt_partlycloudy Partly cloudy. Low in the lower 30s. High in the upper 40s.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 34 | 29 43 | 32 43 | 36 38 | 32
Wind 4 mph NW 5 mph West 4 mph NW 5 mph WNW
Humidity 78% 65% 75% 82%
Chance of Precip. 20% 10% 30% 20%
Cloud Cover 57% 61% 61% 53%
Conditions Partly Cloudy Partly Cloudy Chance of Rain Chance of Rain
Sunrise & Sunset
6:52 AM
5:38 PM
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Nearby
History & Almanac
February 11, 2012 Max Temp Min Temp
Normal (KSTL) 43 °F 25 °F
Record (KSTL) 72 °F (1999) -9 °F (1899)
Yesterday 42 °F 23 °F
Yesterday's Heating Degree Days: 32
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Earthquake Activity
City Distance Mag. Time & Date
No recent earthquake activity has been reported nearby.
Minimum magnitude displayed is 2.5.
Air Quality
  Air Quality AQ Index Pollutant
Yesterday Good
PM2.5
Yesterday Good
OZONE
Current Good
OZONE
Current Good
PM2.5
Saturday Good
PM2.5
Astronomy
Feb. 11, 2012 Rise Set
Actual Time 6:57 AM CST 5:34 PM CST
Civil Twilight 6:30 AM CST 6:01 PM CST
Nautical Twilight 5:58 AM CST 6:32 PM CST
Astronomical Twilight 5:27 AM CST 7:03 PM CST
Moon 10:18 PM CST 8:43 AM CST
Length Of Visible Light 11h 31m
Length of Day
10h 36m
Tomorrow will be 2m 16s longer.
Waning Gibbous, 84% of the Moon is Illuminated
Today
Waning Gibbous
Feb 14
Last Quarter
Feb 21
New
Feb 29
First Quarter
Mar 8
Full
Today's Extremes
State Highs State Lows
26 °F
Poplar Bluff
21 °F
St. Charles
21 °F
St. Louis
5 °F
St. Joseph
8 °F
Chillicothe
8 °F
Kirksville
9 °F
Lee's Summit
Source: NWS
Snow Depth
Station Depth Elevation
No new snow has been reported.
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Travel & Activities
Travel Planning
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Aviation
City Temp. Conditions Updated
St. Louis 18 °F Mostly Cloudy 6:11 AM CST
Cahokia 20 °F Mostly Cloudy 4:53 AM CST
Spirit of St Louis 17 °F Clear 5:54 AM CST
St. Charles 16 °F Scattered Clouds 6:18 AM CST
Flight To ETA Status
AAL430
Dallas-Fort Worth, TX
KSTL 07:47AM On Time
SWA863
Houston, TX
KSTL 07:54AM On Time
SWA752
Newark, NJ
KSTL 07:59AM On Time
Flight Tracker by FlightAware FlightAware
Type Condition
Flight Rule: MVFR (KSTL)
Wind Speed: 7.0 kts.
Wind Dir: 270° (West)
Ceiling: 2800 ft

SPECI KSTL 111211Z 34007KT 10SM BKN028 M08/M13 A3047 RMK AO2 $

Nearby Events
Event Date Forecast
Amy Schumer 7:00 PM CST 2012-02-11 Clear, 20°F
Amy Schumer 9:00 PM CST 2012-02-11 Partly Cloudy, 19°F
Eric Benet 7:00 PM CST 2012-02-11 Clear, 20°F
Eric Benet 9:00 PM CST 2012-02-11 Partly Cloudy, 19°F
Various Hands, Clockwork, and Media Ghost 9:00 PM CST 2012-02-11 Partly Cloudy, 19°F
Robert Glasper Experiment 7:00 PM CST 2012-02-11 Clear, 20°F
Event data courtesy eviesays.com
Sports
Event Date Forecast
Budweiser Shootout 8:29 PM EST on February 18, 2012 Average High 71° F/ 21° C
Gatorade Duel 1 2:19 PM EST on February 23, 2012 Average High 70° F/ 21° C
Event Date Forecast
AT&T Pebble Beach National Pro-Am 8:30 AM PST on February 11, 2012 Chance of Rain, 45 °F
AT&T Pebble Beach National Pro-Am 8:30 AM PST on February 12, 2012 Mostly Cloudy, 45 °F
BMW Championship 8:30 AM CDT on September 06, 2012 Average High 85° F/ 29° C
BMW Championship 8:30 AM CDT on September 07, 2012 Average High 85° F/ 29° C
Weather Stations
Station Location Temp. Windchill Dew Point Humidity Wind Precipitation Elevation Updated Type Website
HADS RIVER DES PERES NEAR UNIVERSITY MO, Saint Louis, MO - - - - North  at  - 0.00 in / hr 560 ft 6:00 AM CST MADIS
HADS BLACK CREEK AT BRENTWOOD MO, Saint Louis, MO - - - - North  at  - 0.00 in / hr 440 ft 5:30 AM CST MADIS
Parkridge, Brentwood, MO 17.4 °F 12 °F 10 °F 73% West  at  3.8 mph 0.00 in / hr 554 ft 6:44 AM CST Rapid Fire  
Cheltenham, St. Louis, MO 17.6 °F 11 °F 4 °F 55% NNW  at  4.5 mph 0.00 in / hr 476 ft 6:45 AM CST Rapid Fire  
HADS DEER CREEK AT BIG BEND DRIVE AT MO, Saint Louis, MO - - - - North  at  - 0.00 in / hr 442 ft 6:00 AM CST MADIS
Lindenwood Park, St Louis, MO 20.1 °F 20 °F 14 °F 78% NNW  at  2.3 mph 0.00 in / hr 468 ft 6:45 AM CST Rapid Fire
APRSWXNET Ladue MO , Saint Louis, MO 17 °F 17 °F 12 °F 80% NNW  at  3 mph 0.00 in / hr 626 ft 6:23 AM CST MADIS
APRSWXNET Olivette MO , Saint Louis, MO 17 °F 7 °F 12 °F 81% WNW  at  7 mph 0.00 in / hr 692 ft 6:29 AM CST MADIS
Shaw/Tower Grove, St. Louis, MO 17.9 °F 18 °F 18 °F 100% WSW  at  0.0 mph 0.00 in / hr 508 ft 6:43 AM CST Normal
Ladue Meadows, Creve Coeur, MO 18.9 °F 19 °F 11 °F 72% NNW  at  2.0 mph 0.00 in / hr 486 ft 6:44 AM CST Normal  
1 Mile South of St. Louis Lambert Airpo, Woodson Terrace, MO 16.4 °F 16 °F 10 °F 76% NE  at  3.0 mph 0.00 in / hr 659 ft 6:45 AM CST Rapid Fire  
APRSWXNET Maryland Heights MO , Maryland Heights, MO 18 °F 5 °F 11 °F 75% North  at  12 mph 0.00 in / hr 548 ft 6:33 AM CST MADIS
South County, Affton, MO 17.2 °F 17 °F 9 °F 70% NNW  at  3.0 mph 0.00 in / hr 480 ft 6:45 AM CST Rapid Fire
Radiom Dr, Affton, MO 17.4 °F 13 °F 4 °F 56% NW  at  3.1 mph 0.00 in / hr 470 ft 6:44 AM CST Rapid Fire  
Whispering Hills, Creve Coeur, MO 18.2 °F 18 °F 12 °F 75% NW  at  2.0 mph 0.00 in / hr 530 ft 6:45 AM CST Rapid Fire
Sunset Hills, St Louis, MO 18.3 °F 18 °F 14 °F 84% WNW  at  0.0 mph 0.00 in / hr 615 ft 6:42 AM CST Rapid Fire
APRSWXNET Sappington MO , Saint Louis, MO 20 °F 20 °F 13 °F 74% NNW  at  0 mph 0.00 in / hr 606 ft 6:16 AM CST MADIS
Big Bend and I-270, Kirkwood, MO 15.5 °F 15 °F 11 °F 81% NW  at  2.0 mph 0.00 in / hr 620 ft 6:45 AM CST Normal  
HADS MALINE CK AT BELLEFONTAINE ROAD MO, Saint Louis, MO - - - - North  at  - 0.00 in / hr 455 ft 5:15 AM CST MADIS
Creve Coeur, St. Louis, MO 16.2 °F 16 °F -3 °F 42% North  at  0.0 mph 0.00 in / hr 512 ft 6:45 AM CST Normal  
Maryland Heights, MO 18.3 °F 18 °F 11 °F 74% SSE  at  0.0 mph 0.00 in / hr 500 ft 6:45 AM CST Rapid Fire  
Old Farm Estates, St. Louis, MO 16.8 °F 17 °F 10 °F 76% North  at  3.0 mph 0.00 in / hr 550 ft 6:43 AM CST Rapid Fire  
South St. Louis County, St. Louis, MO 24.4 °F 24 °F - 57% North  at  0.0 mph 0.00 in / hr 574 ft 6:45 AM CST Normal  
Chesterfield (East), Chesterfield, MO 15.9 °F 9 °F 10 °F 77% WNW  at  4.0 mph 0.00 in / hr 530 ft 6:45 AM CST Normal
APRSWXNET St. Louis MO , Chesterfield, MO 16 °F 7 °F 9 °F 75% North  at  6 mph 0.00 in / hr 542 ft 6:30 AM CST MADIS
Manchester, MO, Manchester, MO 16.8 °F 9 °F 10 °F 76% North  at  5.0 mph 0.00 in / hr 543 ft 6:40 AM CST Normal
The Meadows at Forder Oaks, St. Louis, MO 21.0 °F 21 °F - 65% NNE  at  1.0 mph 0.00 in / hr 545 ft 6:45 AM CST Normal  
HADS CREVE COEUR CREEK AT CHESTERFIEL MO, Chesterfield, MO - - - - North  at  - 0.00 in / hr 500 ft 6:00 AM CST MADIS
HADS MARTIGNEY CK AT SUNRISE HEIGHTS MO, Saint Louis, MO - - - - North  at  - 0.00 in / hr 470 ft 6:00 AM CST MADIS
APRSWXNET Fenton MO , Fenton, MO 19 °F 19 °F 14 °F 81% North  at  3 mph 0.00 in / hr 590 ft 6:00 AM CST MADIS
Riverwood Place, Florissant, MO 16.6 °F 17 °F 9 °F 73% NW  at  3.0 mph 0.00 in / hr 586 ft 6:41 AM CST Normal  
HADS MERAMEC RIVER AT VALLEY PARK MO, Valley Park, MO - - - - North  at  - 0.00 in / hr 430 ft 6:00 AM CST MADIS
Hawkins/Smizer Mill, Fenton, MO 17.2 °F 17 °F 11 °F 76% NW  at  2.0 mph 0.00 in / hr 595 ft 6:45 AM CST Rapid Fire
HADS MISSOURI RIVER AT ST CHARLES MO, Saint Charles, MO - - - - North  at  - 0.00 in / hr 450 ft 6:00 AM CST MADIS
Historic Saint Charles, Saint Charles, MO 17.1 °F 17 °F 10 °F 72% NNW  at  0.0 mph 0.00 in / hr 534 ft 6:43 AM CST Normal  
tel haven ct, Oakville, MO 17.6 °F 11 °F 13 °F 82% NNW  at  4.7 mph - / hr 579 ft 6:33 AM CST Normal  
Oakville,Cardinal Creek Subd, Oakville, MO 16.3 °F 16 °F 11 °F 80% NW  at  2.0 mph 0.00 in / hr 538 ft 6:45 AM CST Rapid Fire
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Local Storm Report


02/10/2012 0229 PM

Kirkwood, St Louis County.

Sleet u0.0 inch, reported by trained spotter.


            Mix of rain and sleet