A cool but decent day for rowing the Potomac. (John Sonderman via Flickr )

TODAY’S DAILY DIGIT
A somewhat subjective rating of the day’s weather, on a scale of zero to 10.

8/10: Maybe I’m just tired of the teasing snowstorms, but I’m ready for spring, and a sunny day well into the 50s is just what the doctor ordered.

EXPRESS FORECAST

Today: Mostly sunny, mild afternoon. Highs: mid- to upper 50s.
Tonight: Mostly clear. Lows: 30s.
Tomorrow: Increasing clouds, afternoon shower? Highs: near 50 to low 50s.

View the current weather conditions at The Washington Post headquarters.

FORECAST IN DETAIL

Just get on with spring already! Once again we’re tracking a possible winter storm, and once again, it’s questionable whether we’ll see much of the white stuff. The time to watch is Monday night into Tuesday. In the meantime, we can enjoy a mostly sunny and relatively mild Sunday, with light winds as well.

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Today (Sunday): Let’s just enjoy today for what it is. Lots of sun, light winds and fairly mild temperatures make for a high note to end the weekend. Mostly sunny skies help morning readings climb through the 30s and into the 40s, with afternoon highs in the mid- to upper 50s feeling mighty nice while out and about. Winds are light and generally from the north-northwest about 5 to 10 mph. Confidence: High

Tonight: Skies stay mostly clear and winds go nearly calm, as temperatures drop quickly after sunset. So while you may have forgone the jacket during the afternoon, you may want it back if still out after dinner. Evening temperatures fall back into the 40s, with overnight lows ranging through the 30s. Confidence: High

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Tomorrow (Monday): As we start the workweek, all eyes are to the southwest as a storm approaches from that direction. We’ll mostly note an increase in cloudiness throughout the day but should stay dry other than the chance of a late afternoon rain shower. Afternoon highs should top out near 50 to the low 50s. Confidence: Medium-High

Tomorrow night: Rain chances increase during the evening as we cool through the 40s, and much of the area may change to snow as steadier precipitation moves in around or after midnight. The main question is whether any snow accumulates on grass and maybe sidewalks and some untreated surfaces, or if it’s heavy enough to cool temperatures close to freezing and accumulate on roads. The best chance of more significant accumulation (although probably not more than a few inches) and effects heading into the Tuesday morning commute is north and west of the Beltway, but we can’t rule out disruptions elsewhere. We hope to pin down the forecast a bit more in our next update. Confidence: Low

A LOOK AHEAD

Snow early, should begin to mix with rain again as the morning progresses on Tuesday, with precipitation becoming lighter by midmorning. Lingering light rain/snow showers remain possible throughout the day, but additional accumulation is unlikely as temperatures rise a bit, into the mid-30s to near 40 for highs. Colder air moves in Tuesday night, with a continued chance of light snow showers. Perhaps a heavier burst could put down a dusting. Lows dip to the upper 20s to low 30s. Confidence: Low-Medium

Snow showers remain possible Wednesday. Again, car tops and grassy areas may briefly whiten, but that should be about it as highs reach near 4o. We’ll also note gustier winds coming from the northwest. Confidence: Medium

SNOW POTENTIAL INDEX
A daily assessment of the potential for at least an inch of snow in the next week, on a zero-to-10 scale.

4/10 (): An inch or more Monday night into Tuesday is doable but not definite, and how much would stick to the roads vs. grass is still in question as we struggle with another tough forecast.