Alert archive / Nebraska / Flash Flood Watches in 2014

Flash Flood Watch 4, NWS Omaha, NE

June 27, 201426 counties in Nebraska; 8 counties in Iowa

NWS Omaha, NE issued this flash flood watch at Jun 27, 2014, 3:31 PM CDT for 26 counties in Nebraska; 8 counties in Iowa. It took effect at Jun 27, 2014, 7:00 PM CDT. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued: Jun 27, 2014, 3:31 PM CDT (20:31 UTC)
In effect from: Jun 27, 2014, 7:00 PM CDT
Expired: Jun 28, 2014, 8:44 AM CDT
In force: 14 hr
Issued by: NWS Omaha, NE
Flood severity: None

All 34 counties

Fremont County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Boone County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Madison County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Platte County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 16 km from the middle of the area, began a volume at 20:33 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 12:00Z, 8.5 hours before the alert went out and 350 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1505 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 27, 12:29 PM CDT, 3 hours 2 minutes earlier.

Area forecast discussion, Jun 27, 12:29 PM CDT, 3 hours 2 minutes before

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Hazardous weather outlook, Jun 27, 11:53 AM CDT, 3 hours 38 minutes before

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In the hours before

Local storm report, Jun 27, 9:58 AM CDT, 5 hours 33 minutes before

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Special weather statement, Jun 27, 10:16 AM CDT, 5 hours 15 minutes before

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Special weather statement, Jun 27, 11:26 AM CDT, 4 hours 5 minutes before

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Special weather statement, Jun 27, 11:28 AM CDT, 4 hours 3 minutes before

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Special weather statement, Jun 27, 12:35 PM CDT, 2 hours 56 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 27, 2:17 AM CDT	Special Weather Statement	OAX	Washington	43 min
Jun 27, 2:37 AM CDT	Special Weather Statement	OAX	Saunders	53 min
Jun 27, 4:24 AM CDT	Special Weather Statement	OAX	Colfax	51 min
Jun 27, 4:27 AM CDT	Special Weather Statement	OAX	Burt	48 min
Jun 27, 5:28 AM CDT	Special Weather Statement	OAX	Butler, Colfax, Cuming, Dodge, Gage, Jefferson and 7 more	62 min
Jun 27, 6:40 AM CDT	Special Weather Statement	OAX	Burt, Cuming, Dodge, Washington	50 min
Jun 27, 6:53 AM CDT	Special Weather Statement	OAX	Gage, Jefferson	52 min
Jun 27, 7:41 AM CDT	Areal Flood Advisory	OAX	Jefferson	3 hr
Jun 27, 8:12 AM CDT	Areal Flood Advisory	OAX	Douglas, Sarpy	3 hr
Jun 27, 8:24 AM CDT	Areal Flood Warning	OAX	Cuming, Dodge	6 hr
Jun 27, 9:03 AM CDT	Areal Flood Advisory	OAX	Gage, Jefferson	4 hr
Jun 27, 10:16 AM CDT	Special Weather Statement	OAX	Colfax	44 min
Jun 27, 11:26 AM CDT	Special Weather Statement	OAX	Jefferson	34 min
Jun 27, 11:28 AM CDT	Special Weather Statement	OAX	Colfax, Cuming	32 min
Jun 27, 12:35 PM CDT	Special Weather Statement	OAX	Burt	25 min
Jun 27, 2:18 PM CDT	River Flood Warning	OAX	Dodge	21 hr

Nearby

Flash Flood Watches in Nebraska, 2014 Flash Flood Watches in Iowa, 2014 Every flash flood watch in 2014

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.