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SPC Day-2 Slight Risk for Tuesday: Southern Plains and Lower Mississippi Valley Under Convective Watch

Storm Prediction Center places a Slight Risk over portions of Texas, Oklahoma, Arkansas, Louisiana, Mississippi, and Tennessee for Tuesday May 6, 2026. KDFW, KOKC, KTUL, KMEM, KLIT under threat.

Cover Image for SPC Day-2 Slight Risk for Tuesday: Southern Plains and Lower Mississippi Valley Under Convective Watch

By AeroCopilot Editorial Team

The Storm Prediction Center's Day-2 Convective Outlook issued May 3, 2026 places a Slight Risk (Categorical Level 2 of 5) over portions of the Southern Plains and Lower Mississippi Valley for Tuesday, May 6, 2026. Hazards listed in the outlook include frequent lightning, severe wind gusts, hail, and isolated tornadoes. KDFW, KOKC, KTUL, KMEM, and KLIT all sit under or near the Slight Risk envelope.

What the Outlook Specifies

The Day-2 Slight Risk corresponds to a probabilistic forecast of severe weather across the affected geography. SPC's categorical scale, in ascending severity, is: General Thunderstorms, Marginal (Cat 1), Slight (Cat 2), Enhanced (Cat 3), Moderate (Cat 4), High (Cat 5). At Slight Risk, the probabilistic component supports an organized severe weather event with isolated to scattered storms producing damaging wind, hail, and the possibility of tornadoes.

The outlook is updated periodically through the day before the event. Pilots planning Tuesday departures into or through the threat area should monitor the Day-1 outlook issued by SPC the morning of May 6 for refined risk assessment.

What Pilots Should Do

For VFR pilots planning Tuesday cross-country flights through the threat area:

  • Check the Day-1 outlook before launch on Tuesday morning. The Day-1 product issued by SPC at 0600 UTC and updated through the day is the operationally relevant version. Day-2 is preliminary.
  • Pull the convective SIGMET map. Convective SIGMETs are issued in real time when storms develop or are forecast within two hours. They are the actionable product, not the SPC outlook.
  • Read the AFD for your route's WFO. The Area Forecast Discussion from each Weather Forecast Office along your route will indicate timing, mode of convection, and forecaster confidence. Timing is the key variable in spring multi-round events.
  • Identify alternates upwind of the developing line. Severe thunderstorms generally move from southwest to northeast in the spring. Plan an alternate that does not require crossing the developing line.
  • Build a delay budget. Spring frontal systems can keep severe weather active across the Southern Plains for many hours. A two-hour delay on a Tuesday departure is cheap insurance.

For IFR pilots, the same logic applies plus standard considerations for ceiling and visibility around convection. Thunderstorms are a no-fly threat regardless of flight rules.

Reading SPC Categories Practically

The categorical levels do not map neatly to a "go/no-go" decision in a Cessna 172 or a King Air. They are calibrated for severe-weather outcomes — tornadoes, large hail, damaging winds — measured against geography and forecaster confidence. The pilot's read of these categories should be operational:

  • Marginal Risk: monitor trends; convection possible but isolated. Most cross-country flights will not be impacted, but watch the SIGMETs.
  • Slight Risk: plan a real backup. Isolated tornadoes possible inside a 200-mile-wide threat box can absolutely show up over your route. Build a delay budget.
  • Enhanced Risk: assume you are not flying. Consider this a no-go threshold for non-essential VFR cross-country.
  • Moderate Risk: no.
  • High Risk: no, and tell your CFI you are no.

These translations are operational rules of thumb, not SPC policy. SPC publishes its category definitions on spc.noaa.gov.

Why It Matters This Week

Spring 2026 has been running above climatology for severe weather in the central United States, including in the Day-2 threat area. NWS Chicago's seasonal summary through April 19 logged 11 severe-weather days against a 4-day average. Spring outflow boundaries can drop ceilings and trigger storms with little warning. A Slight Risk in early May is consistent with the season's pattern; pilots should treat it as the current normal rather than an outlier.

We will update if SPC raises the Day-1 outlook for Tuesday or if convective SIGMETs supersede the categorical product on the day.

Sources

  • NOAA Storm Prediction Center, Day 1 Convective Outlook, May 3, 2026, 2000 UTC
  • NOAA Storm Prediction Center, Day 2 Convective Outlook, May 3, 2026, 1730 UTC
  • Storm Prediction Center categorical risk definitions, spc.noaa.gov
  • Aviation Weather Center, convective SIGMETs, aviationweather.gov