IEM :: Storm Based Warning Stats

Storm Based Warning Geometry Statistics

Pick a time period of your choice and get back a summary table of storm based warning polygon statistics. You should be able to highlight this table and paste it into Excel, if you wish. Please note that prior to formal implementation of Storm Based Warnings, the polygons were not the official warning and so their shape may not have been accurately representing the threat.
Note: Areal flood warning polygons have only been issued since summer of 2007.
Perimeter values are in kilometers and area values in square kilometers.
Links: Download shapefile of these warnings - View visual summaries

	Year	Month	Day	Hour
Start:
End:

Data valid for warnings issued between 17 Aug 2025 00:00 and 18 Aug 2025 00:00 UTC
Weather Forecast Office		Summary			Tornado			Severe Thunderstorm			Marine			Flash Flood			Areal Flood			Dust Storm			Snow Squall
ID	Name	Cnt	Perim	Area	Cnt	Perim	Area	Cnt	Perim	Area	Cnt	Perim	Area	Cnt	Perim	Area	Cnt	Perim	Area	Cnt	Perim	Area	Cnt	Perim	Area
ABQ	Albuquerque	2	92.2	281.4	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	2	92.2	281.4	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
ABR	Aberdeen	8	211.1	2871.4	0	0.0	0.0	5	240.2	3732.4	0	0.0	0.0	0	0.0	0.0	3	162.7	1436.4	0	0.0	0.0	0	0.0	0.0
ARX	La Crosse	1	132.2	950.9	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	1	132.2	950.9	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
BIS	Bismarck	4	255.2	3760.1	0	0.0	0.0	4	255.2	3760.1	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
BUF	Buffalo	3	163.1	1516.2	0	0.0	0.0	1	193.9	2372.6	2	147.6	1088.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
CLE	Cleveland	2	308.6	4460.2	0	0.0	0.0	1	220.5	2319.5	1	396.7	6601.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
CTP	State College	3	120.6	923.6	0	0.0	0.0	3	120.6	923.6	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
CYS	Cheyenne	1	128.3	978.8	0	0.0	0.0	1	128.3	978.8	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
DMX	Des Moines	3	48.1	148.1	3	48.1	148.1	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
DVN	Quad Cities IA IL	4	115.1	698.9	0	0.0	0.0	4	115.1	698.9	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
FSD	Sioux Falls	7	115.5	472.6	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	4	110.1	448.9	3	122.6	504.2	0	0.0	0.0	0	0.0	0.0
GID	Hastings	1	68.3	290.5	0	0.0	0.0	1	68.3	290.5	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
GYX	Gray	3	292.9	4333.7	0	0.0	0.0	1	117.2	783.1	2	380.7	6109.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
ILX	Lincoln	2	100.7	640.5	0	0.0	0.0	1	85.0	503.0	0	0.0	0.0	1	116.4	778.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
IND	Indianapolis	6	134.8	1068.8	0	0.0	0.0	5	129.8	965.9	0	0.0	0.0	0	0.0	0.0	1	159.8	1582.9	0	0.0	0.0	0	0.0	0.0
IWX	Northern Indiana	2	121.1	736.3	0	0.0	0.0	2	121.1	736.3	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
JAX	Jacksonville	4	176.0	2103.7	0	0.0	0.0	1	68.1	308.0	3	212.0	2702.2	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
JSJ	San Juan	16	641.6	21196.4	0	0.0	0.0	0	0.0	0.0	11	891.2	30670.4	4	110.1	437.7	1	22.0	17.6	0	0.0	0.0	0	0.0	0.0
LBF	North Platte	2	126.8	954.3	0	0.0	0.0	2	126.8	954.3	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
LCH	Lake Charles	1	255.1	2440.8	0	0.0	0.0	0	0.0	0.0	1	255.1	2440.8	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
LIX	New Orleans	2	128.6	979.4	0	0.0	0.0	0	0.0	0.0	2	128.6	979.4	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
LOT	Chicago	16	173.0	1666.6	0	0.0	0.0	7	140.7	1119.0	4	195.5	2086.3	4	223.4	2500.9	1	107.1	483.7	0	0.0	0.0	0	0.0	0.0
LSX	St Louis	3	68.0	263.4	0	0.0	0.0	1	70.2	270.8	0	0.0	0.0	1	66.9	259.7	1	66.9	259.7	0	0.0	0.0	0	0.0	0.0
LUB	Lubbock	8	87.1	469.6	0	0.0	0.0	4	91.1	509.9	0	0.0	0.0	4	83.1	429.4	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
LWX	Baltimore/Washington	15	153.2	702.0	0	0.0	0.0	5	110.2	751.5	10	174.7	677.2	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
LZK	Little Rock	2	96.1	556.8	0	0.0	0.0	2	96.1	556.8	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
MAF	Midland/Odessa	1	106.4	656.1	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	1	106.4	656.1	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
MFL	Miami	5	130.5	1084.0	0	0.0	0.0	0	0.0	0.0	5	130.5	1084.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
MKX	Milwaukee/Sullivan	1	54.4	111.1	0	0.0	0.0	1	54.4	111.1	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
MPX	Twin Cities/Chanhassen	6	84.7	378.6	1	67.2	268.3	0	0.0	0.0	0	0.0	0.0	5	88.2	400.7	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
OKX	New York	4	152.9	915.2	0	0.0	0.0	1	116.0	638.9	2	193.7	1264.8	1	108.0	492.4	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
OUN	Norman	3	172.0	2015.9	0	0.0	0.0	3	172.0	2015.9	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
PBZ	Pittsburgh	3	121.3	801.5	0	0.0	0.0	3	121.3	801.5	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
PHI	Mount Holly	3	172.9	1694.8	0	0.0	0.0	1	163.1	1388.4	2	177.8	1848.1	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
SGF	Springfield	2	117.3	832.1	0	0.0	0.0	2	117.3	832.1	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
SHV	Shreveport	2	128.4	1008.3	0	0.0	0.0	2	128.4	1008.3	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
SJT	San Angelo	1	135.7	1080.7	0	0.0	0.0	1	135.7	1080.7	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
TAE	Tallahassee	2	312.0	5516.4	0	0.0	0.0	0	0.0	0.0	2	312.0	5516.4	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
TFX	Great Falls	2	366.7	7520.8	0	0.0	0.0	2	366.7	7520.8	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
UNR	Rapid City	16	211.8	2806.5	0	0.0	0.0	16	211.8	2806.5	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0	0	0.0	0.0
	Total/Averages	172	202.5	3394.6	4	52.9	178.1	83	159.0	1751.2	47	360.7	8695.1	28	116.5	749.0	10	121.2	816.6	0	0.0	0.0	0	0.0	0.0