Chicago predictive radar

Plots of GEFS probabilistic forecast of precipitation, temperature, and sea-level pressure exceeding various thresholds. Reports include rain, snow, ice, and severe weather, as well as other significant information from storm spotters. Displays the climatological significance of precipitation forecast by WPC. We are actively working to resolve this problem. Interactive display of where temperatures could approach or exceed records within the contiguous U.

Displays Days NDFD maximum and minimum temperatures, along with their respective departures from climatology. Prototype Snowband Probability Forecasts An interactive tool that depicts areas of heavy snowfall from individual members of high-resolution short range ensemble forecasts. Weather in Context Prototype Displays forecast information and its climatological context to quickly alert a forecaster when a record or neear-record breaking event is possible.

Nationally consistent and skillful suite of calibrated forecast guidance based on a blend of both NWS and non-NWS numerical weather prediction model data and post-processed model guidance.

Weather Prediction Center. National Oceanic and Atmospheric Administration. Day 1 Day 2 Day 3. Interactive Map. Check out the WPC interactive virtual tour! Analyzed at 21Z Sun Oct 24, Analyzed at 00Z Mon Oct 25, Analyzed at 03Z Mon Oct 25, Analyzed at 06Z Mon Oct 25, Analyzed at 09Z Mon Oct 25, Analyzed at 12Z Mon Oct 25, Analyzed at 15Z Mon Oct 25, Analyzed at 18Z Mon Oct 25, Analyzed at 21Z Mon Oct 25, Analyzed 21Z Mon Oct 25, Powerful autumn nor'easter to produce high winds and heavy rain across parts of the Northeast and New England beginning early Tuesday Unsettled weather lingers over the Northwest and Northern Rockies through at least Thursday A vibrant weather pattern impacting the Nation this week will feature two separate storm systems, with each capable of producing various weather hazards.

In the East, a developing autumn nor'easter is currently gaining strength off the Mid-Atlantic coastline, while an approaching cold front nears the Appalachians.

A few scattered severe thunderstorms are capable between central North Carolina and Virginia this evening as the aforementioned cold front interacts with an abnormally warm and moist airmass located across the Mid-Atlantic.

As the cold front exits the East Coast and an associated upper-level trough over the Great Lakes turns negatively tilted, the low pressure system moving northward near southern New England is forecast to rapidly strengthen. As a result, widespread moderate to heavy rain is expected to blossom over the Northeast and New England on Tuesday, which could produce isolated instances of flash flooding.

High northeasterly winds will also be a concern as widespread gusts up to 50 mph can be expected throughout the region, with higher winds along southern New England and the immediate coastlines. The warm autumn temperatures have resulted in many trees retaining leaves this late into the season, which could lead to an increasing risk of tree damage and power outages.

The storm system is expected to slowly exit farther into the Atlantic Ocean on Wednesday, with lingering showers and gusty winds remaining along coastal regions. The system responsible for the recent atmospheric river event to impact California is slowly exiting the Golden State as the associated cold front and upper-level trough pushes eastward. Showers and high elevation snow is expected to swing through southern California and the Great Basin tonight before reaching the Central Rockies by Tuesday.

By Tuesday afternoon and early evening, a low pressure system is forecast to develop across the central High Plains and will help surge the previously mentioned cold front southeastward across the Southern Plains. This will also aid in sparking a line of potentially severe thunderstorms Tuesday night from Kansas to central Texas. Damaging wind gusts, large hail, and isolated tornadoes are possible. By Wednesday, the low pressure system and threat of severe thunderstorms is forecast to shift into southeast Texas and the central Gulf Coast region.

Elsewhere, continued vigorous flow off the Pacific Ocean in conjunction with an approaching frontal system will help maintain unsettled weather across the Northwest and Northern Rockies over the next few days.

Isolated instances of flooding are possible, specifically along coastal regions of Washington and Oregon on Wednesday. An anomalously deep cyclone forecast to develop over the mid-South will likely bring a period of active weather across the eastern U. Model guidance have generally shown good agreement on the large scale evolution and track of this system, with some expected uncertainties in its timing and details. A general model consensus appeared to work fine for this system by maintaining good continuity with the previous forecasts.

This system may threaten October low pressure records across parts of the mid-Mississippi to Ohio Valley. Over the Pacific Northwest, models are in good agreement to bring a frontal wave onshore with the potential of heavy precipitation especially across the higher terrain. The GFS and GEFS tend to push the associated upper-level shortwave and precipitation farther south during the weekend than the rest of the model guidance.

Elsewhere, models continue to indicate a possible southern stream upper low approaching California next Sat-Mon but with quite a bit of timing uncertainties. The biggest weather threat during the medium range period will be the deep low pressure system working across the eastern third of the U. Conditions should finally dry out by next weekend though as upper ridging builds over the region. Humidity levels though should allow overnight mins to be more above normal. Behind this, upper ridging shifting across the central U.

By Sunday into Monday, it appears that a Canadian high pressure system will bring colder than normal readings down across the northern Rockies and then into the northern and central Plains. Any showers are likely to stay confined to windward facing terrain areas as high pressure builds north of the islands.

The guidance continues to show that upstream upper ridge amplification over the west-central Pacific should allow rounding shortwaves to dig southeastward towards Hawaii the latter half of the next week, which could bring brief disruptions and shift towards more northerly trades later this week. Quantitative Precipitation Forecasts Legacy Page :. Excessive Rainfall Forecasts Legacy Page :. There is an increasing risk for a swath of " of rain falling in just a couple hours from northern VA into MD this evening.

Antecedent conditions are quite dry across this region Thus even these heavier rainfall totals appear unlikely to exceed FFG over most of the area. The exception could be across more sensitive urban areas Chenard 16Z update The Marginal Risk area was adjusted near the ridge line of the southern Sierra Nevadas. The Marginal Risk area over northwest Washington continues to capture the area with the most potential for maximum rainfall and local runoff issues, thus no adjustments made.

Monday, Oct 25 Threat for mainly a few strong to damaging wind gusts and possibly a tornado or two exists this afternoon and evening from central North Carolina into Virginia. Tuesday, Oct 26 Scattered severe thunderstorms associated with large hail, wind damage and isolated tornadoes are expected across parts of the southern and central Plains from late Tuesday afternoon through the evening into the overnight.

Wednesday, Oct 27 Severe thunderstorms associated with wind damage and possibly a few tornadoes are expected from Wednesday into Wednesday night from parts of east and southeast Texas eastward across Louisiana to the central Gulf Coast.

If you prefer, you can jump to the individual images. The following images were created from data from the UTC.