Weather Alerts For Long Valley, SD

# SUMMARY -------------------- TORNADO WATCH 406, PREVIOUSLY IN EFFECT UNTIL 11 PM MDT /MIDNIGHT CDT/ THIS EVENING, IS NOW IN EFFECT UNTIL 1 AM MDT /2 AM CDT/ SUNDAY FOR THE FOLLOWING AREAS IN SOUTH DAKOTA THIS WATCH INCLUDES 4 COUNTIES IN SOUTH CENTRAL SOUTH DAKOTA MELLETTE TODD IN SOUTHWEST SOUTH DAKOTA BENNETT JACKSON THIS INCLUDES THE CITIES OF ALLEN, KADOKA, LACREEK WILDLIFE REFUGE, MARTIN, MISSION, ROSEBUD, SAINT FRANCIS, TUTHILL, WHITE RIVER, AND WOOD. THIS INCLUDES THE TRIBAL LANDS OF THE PINE RIDGE RESERVATION AND THE ROSEBUD RESERVATION. # DETAILS -------------------- ISSUED AT Saturday, June 27, 2026 at 9:38 PM MDT ISSUED BY NATIONAL WEATHER SERVICE RAPID CITY SD HEADER WATCH COUNTY NOTIFICATION FOR WATCH 406

Closest strike: 5.49 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 Slight 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 THROUGH EARLY TONIGHT ACROSS WESTERN NORTH DAKOTA AND VICINITY SUMMARY The threat for isolated very large hail (2+ inches in diameter) and swaths of severe outflow gusts (potentially exceeding 80 mph) will persist through early tonight across the Dakotas and far eastern Montana. A couple of tornadoes will also be possible with lingering supercells this evening and embedded circulations within the larger clusters. Northern Plains Thunderstorms have been growing upscale into the primary cluster over southwest ND, with additional frontal convection into eastern MT and another cluster moving off the lee trough in southwest SD. Vertical shear and buoyancy remain favorable for supercells with isolated very large hail, though the clear trend to the expected cluster/linear mode suggests that severe outflow gusts of 60-85+ mph will be the main threat across the western Dakotas through early tonight. A few tornadoes are still possible late this evening with lingering supercells from west central ND to northwest NE per the 00z BIS and LBF soundings, though the threat will transition more to embedded circulations within line segments across SD/ND. The ND cluster is expected to weaken late tonight across central/eastern ND, while the SD cluster may persist longer in a strengthening warm advection regime, though the severe threat will slowly diminish with eastward extent as the convection becomes elevated. Eastern MO to KY/TN Multiple, remnant MCVs are moving eastward from eastern MO across KY to NC. Prior convection has overturned much of NC, where the threat for wind damage has diminished. There will still be a low-end wind damage threat where the MCVs move along the northern gradient of somewhat larger buoyancy from eastern MO to KY/TN. A brief tornado may also occur in the short term with supercell structures in the warm advection zone where low-level shear is slightly enhanced on the southwest flank of the primary MCV moving across KY. West TX/southeast TX Panhandle in the short term Only isolated deep convection has formed as of this evening across the Pecos Valley and near CDS. Lingering hot surface temperatures and inverted-V profiles could still support isolated severe outflow gusts through about 02-03z.