Alert archive / South Dakota / Flash Flood Warnings in 1997

Flash Flood Warning 5, NWS Rapid City, SD

June 11, 1997Perkins County, Ziebach County, South Dakota

NWS Rapid City, SD issued this flash flood warning at Jun 11, 1997, 11:05 AM MDT for Perkins County, Ziebach County, South Dakota. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 11, 1997, 11:05 AM MDT (17:05 UTC)
Expired: Jun 11, 1997, 5:00 PM MDT
In force: 6 hr
Issued by: NWS Rapid City, SD
Area: Whole counties

Counties Perkins County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 137 km from the middle of the area, began a volume at 17:05 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

Rapid City, SD (KUNR), launched 12:00Z, 5.1 hours before the alert went out and 145 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: 9 J/kg
Mixed-layer CIN: -120 J/kg
Mixed-layer LCL: 896 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Rapid City, SD wrote its last area forecast discussion before this flash flood warning went out at Jun 11, 9:47 AM MDT, 1 hour 18 minutes earlier.

Area forecast discussion, Jun 11, 9:47 AM MDT, 1 hour 18 minutes before

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In the hours before

Special weather statement, Jun 11, 5:15 AM MDT, 5 hours 50 minutes before

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Special weather statement, Jun 11, 5:17 AM MDT, 5 hours 48 minutes before

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Special weather statement, Jun 11, 6:00 AM MDT, 5 hours 5 minutes before

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Special weather statement, Jun 11, 6:05 AM MDT, 5 hours before

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The office that day

Everything else NWS Rapid City, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 11, 12:36 PM MDT	Severe Thunderstorm Warning	UNR		44 min
Jun 11, 1:20 PM MDT	Severe Thunderstorm Warning	UNR		45 min
Jun 11, 1:29 PM MDT	Tornado Warning	UNR	Mellette	31 min
Jun 11, 1:35 PM MDT	Severe Thunderstorm Warning	UNR	Bennett	45 min
Jun 11, 2:02 PM MDT	Severe Thunderstorm Warning	UNR	Mellette	63 min
Jun 11, 2:16 PM MDT	Severe Thunderstorm Warning	UNR	Pennington	49 min
Jun 11, 3:00 PM MDT	Severe Thunderstorm Warning	UNR	Mellette	45 min
Jun 11, 3:28 PM MDT	Severe Thunderstorm Warning	UNR	Todd	47 min

Nearby

Flash Flood Warnings in South Dakota, 1997 Every flash flood warning 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.