What severe-weather types are expected at ENH?

Numerous severe storms with several intense and long-lived. Strong tornadoes (EF2 and EF3) become realistic. Hail to 2″+ (golf ball to baseball). 75+ mph wind gusts. Long-lived organized supercells and the higher-end QLCS/squall-line setups fall into this tier.

What Does ENH Mean in Weather? — SPC Enhanced Risk (Level 3)

What Does ENH Mean in Weather? — SPC Enhanced Risk (Level 3)ENH (Enhanced Risk) is level 3 of 5 on the SPC convective outlook. Numerous severe storms expected, several intense and long-lived. Strong tornadoes (EF2+), 2″+ hail, and 75+ mph wind become realistic threats.ENH stands for Enhanced Risk — the third level on the Storm Prediction Center's categorical convective outlook (level 3 of 5). Numerous severe storms are expected, with several being intense and longer-lived. Strong tornadoes (EF2+), 2″+ hail, and 75+ mph wind gusts become realistic threats. Spotters are typically activated and EMAs pre-position.ENH severe probabilityThe formal SPC threshold for Enhanced Risk is a 30% severe probability within 25 miles of any point — or a 15%+ severe probability that also carries a significant-severe (hatched) overlay. The hatched overlay marks where EF2+ tornadoes or 75+ mph wind or 2″+ hail are expected.ENH vs. SLGTENH is a serious step up from SLGT. SLGT (level 2) means scattered severe storms; ENH means numerous severe storms with several intense and long-lived. The probability of significant severe weather (EF2+ tornadoes, 2″+ hail, 75+ mph wind) is meaningfully higher at ENH. EMAs activate emergency operations centers at ENH; at SLGT they typically coordinate but don't activate fully.ENH vs. MDTENH means numerous severe storms, several intense. MDT (level 4) means widespread severe storms with significant tornadoes likely. The jump from ENH to MDT represents the difference between "spotter activation" and "shelter readiness messaging to the public."Common ENH scenarios

Active dryline plays across the southern Plains.

Strong-shear cold-front passes.

The warm-sector with classic supercell parameters (50+ kt bulk shear, 2000+ J/kg CAPE).

Plains tornado outbreaks of moderate magnitude.

What ENH triggers operationallyENH is a serious posture-change tier. EMAs typically activate emergency operations centers, spotter networks go to active deployment (not just standby), broadcast meteorologists pre-empt programming for the affected counties, and public-facing messaging starts well before the convective initiation window. ENH days are when "this could be a significant day" becomes appropriate.How often ENH is issuedENH is issued roughly 60–80 times per year nationally. By comparison, SLGT is ~250 times/year and MDT is only ~25/year — ENH sits in the middle of the severe spectrum, common enough to be familiar to most operators but rare enough that it is taken seriously every time.See the full SPC convective outlook guide for the complete scale.

Frequently asked questions

What does ENH mean in weather?: ENH stands for Enhanced Risk — SPC's level 3 of 5. Numerous severe storms expected, with several being intense and longer-lived. Strong tornadoes (EF2+), 2″+ hail, and 75+ mph wind gusts become realistic threats. Spotters are typically activated and EMAs pre-position.
What is the difference between ENH and SLGT?: ENH (level 3) is a serious step up from SLGT (level 2) — numerous severe storms expected (not just scattered), several intense and long-lived. The probability of significant severe weather (EF2+ tornadoes, 2″+ hail, 75+ mph wind) is meaningfully higher at ENH. EMAs activate emergency operations centers at ENH; at SLGT they typically coordinate but don't activate fully.
How often is ENH risk issued?: Roughly 60-80 times per year nationally. By comparison, SLGT is issued ~250 times/year and MDT only ~25/year — ENH sits in the middle of the severe spectrum, common enough to be familiar to most operators but rare enough that it is taken seriously every time.
What operational activity does ENH trigger?: ENH is a serious posture-change tier. EMAs typically activate emergency operations centers, spotter networks go to active deployment (not just standby), broadcast meteorologists pre-empt programming for the affected counties, and public-facing messaging starts well before the convective initiation window.
What severe-weather types are expected at ENH?: Numerous severe storms with several intense and long-lived. Strong tornadoes (EF2 and EF3) become realistic. Hail to 2″+ (golf ball to baseball). 75+ mph wind gusts. Long-lived organized supercells and the higher-end QLCS/squall-line setups fall into this tier.

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