Alert archive / Nebraska / Flash Flood Watches in 2014

Flash Flood Watch 5, NWS Omaha, NE

June 30, 201414 counties in Nebraska; 4 counties in Iowa

NWS Omaha, NE issued this flash flood watch at Jun 30, 2014, 2:56 AM CDT for 14 counties in Nebraska; 4 counties in Iowa. It took effect at Jun 30, 2014, 4:00 AM CDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Jun 30, 2014, 2:56 AM CDT (07:56 UTC)
In effect from: Jun 30, 2014, 4:00 AM CDT
Expired: Jun 30, 2014, 1:19 PM CDT
In force: 9 hr
Issued by: NWS Omaha, NE
Flood severity: None

Counties Harrison County, IA, Monona County, IA, Pottawattamie County, IA, Shelby County, IA, Burt County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Madison County, NE, Pierce County, NE, Platte County, NE, Sarpy County, NE, Saunders County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 47 km from the middle of the area, began a volume at 07:57 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

Omaha, NE (KOAX), launched 00:00Z, 7.9 hours before the alert went out and 47 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: 2027 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1288 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 146 m²/s²
0-3 km storm-relative helicity: 271 m²/s²
Significant tornado parameter: 2.3
Supercell composite: 24.3

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 30, 2:45 AM CDT, 11 minutes earlier.

Area forecast discussion, Jun 30, 2:45 AM CDT, 11 minutes before

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Hazardous weather outlook, Jun 29, 9:50 PM CDT, 5 hours 6 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 29, 7:00 PM CDT	Severe Thunderstorm Warning	OAX	Burt	30 min
Jun 30, 3:33 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox, Pierce	27 min
Jun 30, 3:51 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox, Pierce	39 min
Jun 30, 4:01 AM CDT	Severe Thunderstorm Warning	OAX	Cedar, Pierce	29 min
Jun 30, 4:29 AM CDT	Severe Thunderstorm Warning	OAX	Cedar, Pierce	31 min
Jun 30, 6:26 AM CDT	Severe Thunderstorm Warning	OAX	Cedar, Pierce	34 min
Jun 30, 7:12 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Dodge, Washington	33 min
Jun 30, 7:20 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox	29 min
Jun 30, 7:29 AM CDT	Severe Thunderstorm Warning	OAX	Cedar, Pierce, Wayne	46 min
Jun 30, 7:59 AM CDT	Tornado Warning	OAX	Pierce, Wayne	31 min
Jun 30, 8:16 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Washington	44 min
Jun 30, 8:24 AM CDT	Tornado Warning	OAX	Cuming, Stanton, Thurston, Wayne	36 min
Jun 30, 8:51 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone	39 min
Jun 30, 8:59 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming, Thurston	31 min
Jun 30, 9:18 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Thurston	42 min
Jun 30, 9:27 AM CDT	Special Weather Statement	OAX	Madison, Pierce, Wayne	48 min
Jun 30, 9:57 AM CDT	Severe Thunderstorm Warning	OAX	Colfax, Cuming, Madison, Platte, Stanton, Wayne	48 min
Jun 30, 10:02 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Madison, Pierce	28 min
Jun 30, 10:16 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming, Thurston, Wayne	44 min
Jun 30, 10:37 AM CDT	Flash Flood Warning	OAX	Burt, Cuming, Stanton, Thurston, Wayne	3 hr
Jun 30, 10:37 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming, Thurston	53 min
Jun 30, 10:41 AM CDT	Special Weather Statement	OAX	Pierce, Wayne	49 min
Jun 30, 10:51 AM CDT	Severe Thunderstorm Warning	OAX	Pierce, Wayne	39 min
Jun 30, 11:04 AM CDT	Flash Flood Warning	OAX	Burt, Thurston	3 hr
Jun 30, 11:10 AM CDT	Severe Thunderstorm Warning	OAX	Burt	65 min
Jun 30, 11:24 AM CDT	Severe Thunderstorm Warning	OAX	Thurston, Wayne	51 min
Jun 29, 7:41 PM CDT	Special Weather Statement	OAX	Harrison	19 min
Jun 29, 8:09 PM CDT	Tornado Warning	OAX	Shelby	20 min
Jun 30, 7:27 AM CDT	Special Weather Statement	OAX	Harrison	48 min
Jun 30, 7:43 AM CDT	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie	32 min
Jun 30, 7:45 AM CDT	Severe Thunderstorm Warning	OAX	Harrison	30 min
Jun 30, 8:14 AM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie	46 min
Jun 30, 8:45 AM CDT	Severe Thunderstorm Warning	OAX	Harrison, Shelby	45 min
Jun 30, 8:57 AM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie, Shelby	33 min
Jun 30, 9:28 AM CDT	Severe Thunderstorm Warning	OAX	Shelby	34 min
Jun 30, 9:39 AM CDT	Severe Thunderstorm Warning	OAX	Shelby	23 min
Jun 30, 9:58 AM CDT	Severe Thunderstorm Warning	OAX	Monona	32 min
Jun 30, 11:36 AM CDT	Severe Thunderstorm Warning	OAX	Shelby	39 min
Jun 30, 11:50 AM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie	25 min
Jun 30, 11:56 AM CDT	Flash Flood Warning	OAX	Harrison, Pottawattamie, Shelby	3 hr
Jun 30, 3:03 PM CDT	Areal Flood Advisory	OAX	Shelby	3 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.