Alert archive / Nebraska / Flash Flood Watches in 2015

Flash Flood Watch 2, NWS Omaha, NE

June 3, 20157 counties in Nebraska

NWS Omaha, NE issued this flash flood watch at Jun 3, 2015, 3:26 PM CDT for 7 counties in Nebraska. It took effect at Jun 3, 2015, 7:00 PM CDT. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Jun 3, 2015, 3:26 PM CDT (20:26 UTC)
In effect from: Jun 3, 2015, 7:00 PM CDT
Expired: Jun 4, 2015, 10:00 AM CDT
In force: 15 hr
Issued by: NWS Omaha, NE
Flood severity: None

Counties Gage County, NE, Jefferson County, NE, Johnson County, NE, Nemaha County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE

The radar

The Omaha radar (KOAX), 115 km from the middle of the area, began a volume at 20:26 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

Topeka, KS (KFOE), launched 12:00Z, 8.4 hours before the alert went out and 158 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: 415 J/kg
Mixed-layer CIN: -232 J/kg
Mixed-layer LCL: 876 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 168 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 watch went out at Jun 3, 12:40 PM CDT, 2 hours 46 minutes earlier.

Area forecast discussion, Jun 3, 12:40 PM CDT, 2 hours 46 minutes before

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Hazardous weather outlook, Jun 3, 12:04 PM CDT, 3 hours 22 minutes before

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In the hours before

Special weather statement, Jun 3, 10:12 AM CDT, 5 hours 14 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 3, 2:10 AM CDT	Special Weather Statement	OAX	Colfax, Madison, Platte, Stanton	35 min
Jun 3, 2:48 AM CDT	Special Weather Statement	OAX	Butler, Colfax, Dodge, Saunders, Seward	27 min
Jun 3, 10:12 AM CDT	Special Weather Statement	OAX	Gage	48 min

Nearby

Flash Flood Watches in Nebraska, 2015 Every flash flood watch in 2015

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.