Alert archive / Missouri / Tornado Warnings in 1997

Tornado Warning 4, NWS St. Louis, MO

May 17, 1997Crawford County, Missouri

NWS St. Louis, MO issued this tornado warning at May 17, 1997, 9:49 PM CDT for Crawford County, Missouri. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 17, 1997, 9:49 PM CDT (02:49 UTC)
Expired: May 17, 1997, 10:15 PM CDT
In force: 26 min
Issued by: NWS St. Louis, MO
Area: Whole counties

County Crawford County, MO

The radar

The St Louis radar (KLSX), 97 km from the middle of the area, began a volume at 02:52 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 2.8 hours before the alert went out and 251 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1784 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1565 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 17, 8:21 PM CDT	Severe Thunderstorm Warning	LSX	Washington	69 min
May 17, 8:48 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois	57 min
May 17, 9:03 PM CDT	Severe Thunderstorm Warning	LSX	Iron	42 min
May 17, 9:44 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	31 min
May 17, 10:05 PM CDT	Severe Thunderstorm Warning	LSX	Washington	40 min
May 17, 10:13 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	47 min
May 18, 12:15 AM CDT	Severe Thunderstorm Warning	LSX	Franklin	45 min
May 18, 7:11 AM CDT	Severe Thunderstorm Warning	LSX	Knox	49 min
May 18, 7:42 AM CDT	Severe Thunderstorm Warning	LSX	Clark	48 min

Nearby

Tornado Warnings in Missouri, 1997 Every tornado warning in 1997 Tornadoes in 1997

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.