Weather Alerts For Pierson, IA

A Weather Alert has been issued for a nearby area. While your current location is outside of the impacted area, please stay alert and monitor weather conditions. # SUMMARY -------------------- The National Weather Service in Sioux Falls has issued a - Flash Flood Warning for... Northwestern Woodbury County in west central Iowa... Northeastern Dakota County in northeastern Nebraska... - Until 730 AM CDT. - At 437 AM CDT, Radar indicated thunderstorms producing heavy rain across the warned area. Between 0.5 and 2 inches of rain have fallen. Additional rainfall amounts up to 2 inches are possible in the warned area. Flash flooding is already occurring. # DETAILS -------------------- HAZARD Flash flooding caused by thunderstorms. SOURCE Broadcast media reported. IMPACT Flash flooding of urban areas, highways, streets and underpasses as well as other poor drainage and low- lying areas. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE - Sioux City and South Sioux City. - Broadcast media reported water covering the intersection of 15th Street and G Street in South Sioux City. Additional rainfall from thunderstorms could exacerbate flooding in this area as well as poor drainage areas around the city. ISSUED AT Tuesday, June 30, 2026 at 4:37 AM CDT ISSUED BY National Weather Service Sioux Falls SD HEADER BULLETIN - EAS ACTIVATION REQUESTED | Flash Flood Warning # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Be aware of your surroundings and do not drive on flooded roads.

Closest strike: 0.08 miles Stay Alert! Remain in a safe area until there has been no lightning within 10 miles of this location for 30 minutes. Please be aware that lightning activity can remain high even when a storm is moving away from your location. Even if rain has stopped, do not leave your safe area until WeatherBug indicates that lightning is more than 10 miles away from this selected location. IF OUTDOORS Avoid water, high ground, and open spaces. Avoid all metal objects including electric wires, fences, and machinery. Find a safe area in a building or in a fully enclosed vehicle with the windows completely shut. Unsafe places include underneath canopies, small picnic or rain shelters, convertibles, or near trees. IF INDOORS Avoid water and stay away from doors and windows. Avoid using a hard line telephone. Take off headphones. Turn off, unplug, and stay away from appliances, computers, power tools, and TV sets. Lightning may strike exterior electric and phone lines, inducing shocks to inside equipment.

There is a Enhanced Severe Storm Risk for your location. Continue reading for today's outlook from the National Weather Service's Storm Prediction Center. -------------------- National Severe Storm Outlook THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS PORTIONS OF THE MIDWEST AND CENTRAL PLAINS SUMMARY Severe thunderstorms are expected this evening across the Dakotas, Upper Midwest and Middle Missouri Valley, including damaging winds, large hail and a few tornadoes. Northern Plains and Midwest Thunderstorm activity has initiated across eastern Nebraska near the cold front this evening, with additional areas of towering cu noted into northern Kansas. As the low-level jet strengthens and ascent increases with the approaching wave, it is likely additional thunderstorm development will occur into the evening. Guidance suggests that a mix of supercells and multi-cell clusters will emerge and spread east northeastward into far southeastern SD/northwestern IA and western MN. Strong to extreme instability and steep lapse rates downstream will likely support potential for damaging wind, with some significant gusts 75+ mph possible. Large to very large hail will also be possible where supercells can maintain semi-discrete mode. An upgrade to Enhanced was made with this update to account for this potential. See MCD#1386 for additional information on the short term severe potential. Further north across eastern North Dakota into western/central Minnesota near the surface low/warm front interface, potential will continue for supercells capable of all hazards including large hail, damaging wind, and strong tornadoes. See MCD#1387 for more information. Southwest Texas to the Texas/Oklahoma Panhandles Thunderstorm activity continues across southwestern Texas into the Texas/Oklahoma Panhandles near the dryline. Very warm temperatures and dry mixed boundary layer conditions will continue to pose some potential for damaging winds until sunset this evening. Georgia into northern Florida Peninsula A cluster of thunderstorms continues to move southwestward across southern/central Georgia this evening. Ahead of this cluster, hot and moderately unstable conditions will continue to pose potential for water loaded downdrafts that my produce strong to severe winds.