SEVERE WEATHER INDICES REFERENCE TABLE | Kokomo-Weather & @HighRiskIndiana

SEVERE WEATHER INDICES REFERENCE TABLE
Showalter Index		CHNI		Bulk Richardson Number
3+	Stable	0-50	Weak Cap	>50+	Strong Chance Multi Cell Thunderstorms
1 to 2	Marginal Instability	51-99	Moderate Cap	11-49	Moderate Chance Isolated Supercells
0 to -4	Large Instability	200+	Strong Cap	<10	Thunderstorms Unlikely
-5 or less	Extreme Instability
K Index		Sweat Index		Lifted Index
15 or less	No Convective Potential	299 or less	Thunderstorms Unlikely	>3	Stable
16-25	Small Convective Potential	300-399	Moderate Risk of Scattered Severe Thunderstorms	1 to 2	Limited Instability
26-39	Moderate Convective Potential	400-499	Strong Risk of Scattered Severe Thunderstorms / Possible Isolated Tornadoes	0 to -1	Moderate Instability
40+	High Convective Potential	500-599	Strong Risk of Severe Thunderstorms / Isolated Tornadoes	-2 to -3	Thunderstorms Probable
		600-799	High Risk Severe Thunerstorms / Scattered Tornadoes	-4 to -6	Strong to Severe Thunderstorms & Tornadoes Possible
		800+	Not Favorable for Severe Weather / High Winds Possible	-7 or less	Tornadoes Likely
CAPE		Helicty		EHI
1-1500	Positive	>149	Supercells Unlikely	>1	Supercell Potential
1500-2499	Large	150-299	Supercells Possible	1	F0 ro F1 Tornadoes Possible
2500-3499	Extreme	300-399	Supercells Favorable	2-5	F0 to F2, F3 Tornadoes Possible
3500+	Very Extreme	400+	Tornadic Possible	5+	F0 to F4, F5 Tornadoes Possible
Total Totals		Precipitable Water		Storm UVV (m/s)
<43	Convection Not Likely	0.50" or less	Very Low	40 or less	Regular Updraft
44-45	Thunderstorms Possible	0.50"-1.25"	Low	41-60	Strong Updraft
46-47	Isolated Severe Storms	1.25"-1.75"	Moderate	61-80	Very Strong Updraft
48-49	Widely Scattered Severe	1.75"-2.00"	High	81 or greater	Extreme Updraft
50-51	Scattered Severe Storms	2.00"+	Very High
52-54	Scattered to Numerous Severe Storms	Craven SigSvr Parameter		Supercell Composite Parameter
>55	Numerous Severe Storms	>20	Significant Severe Potential	>1	Severe Potential