Tomorrow

Forecast at a Glance from the National Weather Service

Tonight Mostly Clear Lo 38 °F

Wednesday Mostly Sunny Hi 51 °F

Wednesday Night Slight Chc Rain Lo 38 °F

Thursday Chance Rain Hi 51 °F

Thursday Night Rain Likely Lo 40 °F

Friday Rain Hi 49 °F

Friday Night Rain Likely Lo 45 °F

Saturday Rain Likely Hi 51 °F

Saturday Night Rain Likely Lo 44 °F

Go to National Weather Service page
Detailed site information

Weather Forecasts for Tomorrow, Wednesday 10 March 2010

Forecaster	Tmin(F)	Tmax(F)	Precip(in)	Comment
Highest-Rated Forecasters From All Divisions
NWS-MOS-GFS-12-DAY1	37	50	0
NWS-MOS-NAM-00-DAY1	39	49	0
NWS-MOS-GFS-00-DAY1	36	49	0
NWS-MOS-GFS-18-DAY1	38	51	0
NWS-MOS-GFS-06-DAY1	36	49	0
NWS-MOS-NAM-12-DAY1	40	50	0
NWS-MOS-GFS-12-DAY2	35	50	0
NWS-MOS-GFS-18-DAY2	35	51	0
NWS-MOS-GFS-06-DAY2	35	50	0
NWS-MOS-NAM-12-DAY2	38	49	0
CLIMATOLOGY	31	47	0.12	From 1971-2000 U.S. Climate Normals

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A Sample Forecasting Procedure

Weather forecasters look at many types of data to help them build a forecast, and each forecaster will have their own approach. Here is a simple procedure to get you started.

1. First look at current weather conditions:
   

   Surface Analysis

   Visible Satellite

   Infrared Satellite

   Radar

   
   A good stating point for formulating your forecast will be determining what is happening around the country today. Where are the major weather systems? Where has it been hot? Where has it been raining? Is any of this weather moving towards my forecasting site over the next forecasting period?
2. Look at the National Weather Service hourly weather forecast graph and the forecast of fronts and precipitation:
   

   Graph

   Fronts/Precip

   Remember that the forecast day goes from about midnight to midnight local time. We forecast for a daily High and Low. The Low is typically recorded in the early morning hours of the day, while the high is generally reached in the afternoon. But check the hourly graph for the possibility that the Low and High might come at different times. For example, if a strong cold front comes through early in the day, the High might be in the early morning hours and the temperature might fall for the rest of the day, and the Low would be at the very end of the day.
3. Look at National Weather Service precipitation forecasts:
   

   Precip

   The times for these plots are in UTC (or GMT); a contest day goes from 0600 UTC (about midnight in most of the U.S.) to 0600 UTC the next day. Click on the plots corresponding to those hours. Your precip forecast is for the whole day, so you would add the amounts from each 6- or 12-hr plot to calculate what the NWS is predicting for the entire contest day. Remember that you need to predict the amount in inches, and most locations receive amounts over one inch only a few times each year. On most days the precip forecast should be zero, and for many others it will be a few hundredths of an inch (e.g. 0.15 inches).
4. Check and submit your forecast:
   Once you have determined your high, low, and precipitation amount, check it with the computer model forecasts shown in the table above. Are you close? Generally it’s a good idea to be fairly close to these computer forecasts, because they're typically quite good. Once you've entered your forecast in the form above, click the Submit button.

Legend

This Month's Division Leaders

month division wins in last year
week division wins in last month
day division wins in last week

Elementary School Divisions

Middle School Divisions

High School Divisions

College Divisions

Teacher Division

Open Division

Computer Division

Consensus Division

Reference Division

Today

Weather Forecasts for Today, Tuesday 9 March 2010

Forecaster	Tmin(F)	Tmax(F)	Precip(in)	Comment
OBSERVED	44	62	0	Observed data through: 18:51 EST.
Highest-Rated Forecasters From All Divisions
MEDIAN	36	50	0
CONSENSUS-1	36.8	50.3	0
NWS-MOS-GFS-00-DAY0	39	51	0
NWS-MOS-GFS-12-DAY1	36	51	0
NWS-MOS-NAM-00-DAY1	38	50	0
NWS-MOS-NAM-00-DAY0	41	54	0
NWS-MOS-GFS-00-DAY1	35	48	0
NWS-MOS-GFS-18-DAY1	37	51	0
NWS-MOS-GFS-06-DAY1	35	49	0
NWS-MOS-NAM-12-DAY1	36	49	0
NWS-MOS-GFS-12-DAY2	35	50	0
NWS-MOS-GFS-18-DAY2	35	50	0
NWS-MOS-GFS-06-DAY2	35	49	0
NWS-MOS-NAM-12-DAY2	37	48	0
CLIMATOLOGY	31	47	0.12	From 1971-2000 U.S. Climate Normals
PERSISTENCE	40	63	0

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Legend

This Month's Division Leaders

month division wins in last year
week division wins in last month
day division wins in last week

Elementary School Divisions

Middle School Divisions

High School Divisions

College Divisions

Teacher Division

Open Division

Computer Division

Consensus Division

Reference Division

Yesterday

Weather Forecasts for Yesterday, Monday 8 March 2010

Forecaster	Tmin (score)	Tmax (score)	Precip (score)	Comment	Day Score	Division Points
OBSERVED	40	63	0	FINAL.
Best Forecasts From All Divisions
PERSISTENCE	35 (5)	59 (4)	0 (0)		9
NWS-MOS-NAM-00-DAY0	40 (0)	53 (10)	0 (0)		10	12
NWS-MOS-NAM-00-DAY1	37 (3)	52 (11)	0 (0)		14	11
NWS-MOS-NAM-12-DAY1	36 (4)	52 (11)	0 (0)		15	10
NWS-MOS-GFS-00-DAY0	38 (2)	49 (14)	0 (0)		16	9
NWS-MOS-NAM-12-DAY2	37 (3)	49 (14)	0 (0)		17	8
CONSENSUS-1	35.2 (4.8)	50.5 (12.5)	0 (0)		17.3
NWS-MOS-GFS-18-DAY1	34 (6)	51 (12)	0 (0)		18	7
NWS-MOS-GFS-12-DAY1	34 (6)	50 (13)	0 (0)		19	6
MEDIAN	34 (6)	50 (13)	0 (0)		19
NWS-MOS-GFS-06-DAY2	34 (6)	49 (14)	0 (0)		20	4
NWS-MOS-GFS-12-DAY2	33 (7)	50 (13)	0 (0)		20	4
NWS-MOS-GFS-18-DAY2	33 (7)	50 (13)	0 (0)		20	4
NWS-MOS-GFS-00-DAY1	33 (7)	49 (14)	0 (0)		21	1.5
NWS-MOS-GFS-06-DAY1	33 (7)	49 (14)	0 (0)		21	1.5
CLIMATOLOGY	31 (9)	46 (17)	0.12 (6.7)	From 1971-2000 U.S. Climate Normals	32.7

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Daily Weather Map page

Results for Previous Days

Sunday 7 March 2010
Saturday 6 March 2010
Friday 5 March 2010
Thursday 4 March 2010

Legend

This Month's Division Leaders

month division wins in last year
week division wins in last month
day division wins in last week

Elementary School Divisions

Middle School Divisions

High School Divisions

College Divisions

Teacher Division

Open Division

Computer Division

Consensus Division

Reference Division

Standings

Leading Weather Forecasters for Week of Sun 28 Feb 2010 - Sat 6 Mar 2010

Rank

Forecaster

# Forecasts

Tmin Score

Tmax Score

Precip Score

Week Score

Division Points

View All Forecasters For This Week By Division

Leading Weather Forecasters for March 2010

Rank

Forecaster

# Forecasts

Tmin Score

Tmax Score

Precip Score

Month Score

Division Points

View All Forecasters For This Month By Division

Legend

This Month's Division Leaders

month division wins in last year
week division wins in last month
day division wins in last week

Elementary School Divisions

Middle School Divisions

High School Divisions

College Divisions

Teacher Division

Open Division

Computer Division

Consensus Division

Reference Division

Top Forecasters

Highest-Rated Weather Forecasters, All Divisions

Higher numbers are better, minimum of 5 forecasts

Rank	Forecaster	# Forecasts	Forecaster Rating
1	MEDIAN	25	110.8
2	CONSENSUS-1	25	110.7
3	NWS-MOS-GFS-00-DAY0	25	106.8
4	NWS-MOS-GFS-12-DAY1	25	103.2
5	NWS-MOS-NAM-00-DAY1	25	101.6
6	NWS-MOS-NAM-00-DAY0	25	101.3
7	NWS-MOS-GFS-00-DAY1	25	100.5
8	NWS-MOS-GFS-18-DAY1	25	99.1
9	NWS-MOS-GFS-06-DAY1	25	98.0
10	NWS-MOS-NAM-12-DAY1	25	97.6
11	NWS-MOS-GFS-12-DAY2	25	94.7
12	NWS-MOS-GFS-18-DAY2	25	90.4
13	NWS-MOS-GFS-06-DAY2	25	89.9
14	NWS-MOS-NAM-12-DAY2	25	76.0
15	PERSISTENCE	25	-13.2
16	CLIMATOLOGY	25	-168.7

Legend

This Month's Division Leaders

month division wins in last year
week division wins in last month
day division wins in last week

Elementary School Divisions

Middle School Divisions

High School Divisions

College Divisions

Teacher Division

Open Division

Computer Division

Consensus Division

Reference Division