Track Thunderstorms for 93641: Live Map Updates, Alerts & Warnings
Monitor live thunderstorms for 93641 with an interactive weather map, current alert polygons, radar updates, nearby threat distances, and browser-based alarm options. This page is built to help you track active warnings and approaching severe weather threats for this specific location.
Closest Thunderstorm Threats To 93641
This table compares active thunderstorm warning areas against 93641, then lists the closest current threats by distance. Use it to review impacted areas, alert descriptions, safety instructions, start times, expiration times, and quick map links for nearby severe weather alerts.
| Distance | Event | Impacted Areas | Description | Instructions | Start Time | Expires At | Quick View |
|---|---|---|---|---|---|---|---|
| Loading... | Checking nearby threats... | Loading impacted areas... | Current alert details will appear here after the latest weather data loads. | Loading instructions... | Loading... | Loading... | Loading... |
Set Up Custom Alarms To Notify You of Thunderstorms Near 93641
Set a browser-based alarm for thunderstorms impacting 93641. The alarm checks your selected weather alert categories and plays a loud notification in this browser tab if a matching active alert comes within your chosen distance.
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How We Track Thunderstorms For This Area (93641)
This page tracks live thunderstorm alerts, radar updates, and nearby warnings for 93641. This specific location's boundary is used to focus the map, compare active National Weather Service alert polygons, and calculate exactly how far nearby thunderstorm threats are from this area.
Geographic Data Used For This Location
The following location-specific geographic values are utilized for tracking thunderstorm threats to this area. The internal point and bounding box summarize the location area, while the full geometry coordinate set is used to construct the actual boundary shown on the map and to perform our precise tracking calculations.
Tracked location: 93641
Location type: ZIP Code
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Location Boundary Data Source
For ZIP code pages, this website uses Census ZIP Code Tabulation Area data. ZCTAs are Census geographic areas that approximate ZIP code service areas for mapping and statistical use. Extreme Weather Tracking processes this geographic data into lightweight location-specific boundary files. The full coordinate geometry from each boundary file is used to draw the exact geographical area on our live map and compare that area against active weather alert polygons.
Source: U.S. Census Bureau ZIP Code Tabulation Areas (ZCTAs)
How Thunderstorm Threat Distances Are Calculated For This Location
The distance values shown in the "Closest Thunderstorm Threats" table — and used to trigger our browser-based alarm — represent the approximate edge-to-edge distance in miles between the 93641 boundary area and each active National Weather Service alert polygon. A distance of 0 miles means the alert polygon overlaps or is contained within the tracked location boundary.
Distances are not calculated from a single center point or internal point coordinate. Instead, the full boundary geometry of 93641 — the same coordinate set used to draw the location boundary on the map — is compared against the full polygon geometry of each active weather alert. This means a thunderstorm warning that is close to the edge of 93641 but not overlapping it will show a short but non-zero distance, while one that crosses into the boundary area will show 0 miles.
Live Thunderstorm Tracking — FAQ (Frequently Asked Questions)
How severe does a thunderstorm need to be to appear on this live map?
This thunderstorm tracking page is configured to display NWS alert polygons for Severe Thunderstorm Warnings, Severe Weather Statements, Special Weather Statements, and Special Marine Warnings. Ordinary rain showers or non-alerted thunderstorms generally will not appear as warning polygons unless they are included in one of those NWS alert types.
Does this page provide information about the expected path of a severe thunderstorm?
Often, yes. The full NWS alert text for a severe thunderstorm may include details such as the storm location, movement direction, movement speed, hazard type, impacted areas, and timing. Those details can help users compare the warning area against 93641 on the map. However, thunderstorm movement can change quickly, so the full warning polygon should be treated as the practical risk area.
Does the interactive map show real-time lightning strike locations?
No. This map does not render individual real-time lightning strike locations. It focuses on NWS alert polygons, live radar imagery, warning text, alert timing, and distance from the selected location. Users should read the full alert details for information about lightning risk and other storm hazards.
Are the thunderstorm warning areas also hail-risk areas?
They can be, but not always. Severe thunderstorms are often associated with damaging wind, large hail, frequent lightning, and heavy rain, but each warning can describe a different hazard mix. Users should check the full NWS alert text for details about whether hail is expected, whether hail has been observed, and what hail size may be possible.
Does this page show the wind-speed or wind-gust risk for each thunderstorm?
Usually, the NWS alert text provides the best details about expected thunderstorm wind risk. Severe Thunderstorm Warnings often include information about estimated or observed wind speeds, damaging wind gusts, hail size, storm movement, and impacted areas. This page displays the warning area on the map and provides the alert details so users can review the specific threat information for each storm.
What should I use if I want to track tornadoes, flooding, or broader severe weather near 93641?
This page is focused specifically on live thunderstorm tracking for 93641. To monitor other severe weather categories for this same location, use the related pages for live tornado tracking, live flooding tracking, or the broader live severe weather tracking map.
Weather Data Sources, Radar Processing, & Severe Weather Tracking Methodology
Extreme Weather Tracking uses official United States weather datasets as raw input data for this severe weather tracking application. Instead of simply embedding external weather maps or republishing raw alert feeds, this website processes, transforms, organizes, filters, and visualizes multiple live weather datasets into a location-focused interactive severe weather monitoring system.
National Weather Service (NWS) Alert Processing
Severe weather alerts, warning polygons, event timing, and alert details are sourced from the National Weather Service. Extreme Weather Tracking processes this live alert data into interactive map overlays, categorized alert layers, color-coded polygon systems, stacked overlapping-alert interfaces, closest-threat calculations, browser-based alarm functionality, and location-specific severe weather tracking pages.
Raw NWS polygon coordinate data is transformed into customized interactive map layers with dynamically assigned styling rules, warning-category filtering, active/expired alert handling, polygon overlap detection, popup interfaces, category-specific visual grouping systems, zoomable map interactions, and quick-navigation links that can automatically focus and zoom the map toward specific severe weather threats near each page's dedicated geographical location. Alert polygons are also compared directly against tracked location boundaries to calculate approximate edge-to-edge severe weather threat distances for the specific location.
NOAA Radar Data Processing
Radar imagery displayed on this website is based on NOAA MRMS (Multi-Radar Multi-Sensor) weather radar datasets. Instead of directly embedding static NOAA radar images, Extreme Weather Tracking downloads raw NOAA radar reflectivity data, processes the binary radar grid values, converts the reflectivity measurements into custom-generated radar imagery, and builds optimized radar overlay layers for use within the interactive map system.
The radar processing pipeline includes decompressing NOAA GRIB2 radar datasets, exporting raw reflectivity grids, interpolating radar values, converting reflectivity intensities into customized radar color mappings, generating optimized PNG radar image chunks, and constructing radar overlay layers aligned to precise geographic coordinate boundaries. These processed radar layers are then combined with live NWS warning polygons and tracked location boundaries within the interactive map interface.
Weather Data Sources
Extreme Weather Tracking is not an official government weather service. Always follow instructions from the National Weather Service, local emergency management officials, and other official safety authorities during severe weather events.