Alert archive / Nebraska / Flash Flood Warnings in 2010

Flash Flood Warning 7, NWS Omaha, NE

June 14, 2010Boone County, Nebraska

NWS Omaha, NE issued this flash flood warning at Jun 14, 2010, 4:01 AM CDT for Boone County, Nebraska. It was in force for 16 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 14, 2010, 4:01 AM CDT (09:01 UTC)
Expired: Jun 14, 2010, 7:40 PM CDT
In force: 16 hr
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Flood severity: None

County Boone County, NE

The radar

The Omaha radar (KOAX), 148 km from the middle of the area, began a volume at 09:01 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 9.0 hours before the alert went out and 221 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: 115 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 560 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

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 Omaha, NE wrote its last area forecast discussion before this flash flood warning went out at Jun 14, 3:46 AM CDT, 15 minutes earlier.

Area forecast discussion, Jun 14, 3:46 AM CDT, 15 minutes before

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Hazardous weather outlook, Jun 13, 5:31 PM CDT, 10 hours 30 minutes before

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The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 13, 9:48 PM CDT	Areal Flood Warning	OAX	Washington	60 hr
Jun 13, 9:55 PM CDT	Areal Flood Warning	OAX	Cass, Otoe	36 hr
Jun 14, 1:21 AM CDT	Areal Flood Advisory	OAX	Cass, Douglas, Sarpy	3 hr
Jun 14, 3:47 PM CDT	Areal Flood Warning	OAX	Sarpy	48 hr
Jun 14, 8:41 AM CDT	River Flood Warning	OAX	Montgomery	8 hr
Jun 14, 8:41 AM CDT	River Flood Warning	OAX	Fremont	8 hr

Nearby

Flash Flood Warnings in Nebraska, 2010 Every flash flood warning in 2010

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.