Alert archive / Nebraska / Flash Flood Watches in 2015

Flash Flood Watch 3, NWS Omaha, NE

June 4, 201515 counties in Nebraska; 4 counties in Iowa

NWS Omaha, NE issued this flash flood watch at Jun 4, 2015, 1:14 PM CDT for 15 counties in Nebraska; 4 counties in Iowa. It took effect at Jun 4, 2015, 3:00 PM CDT. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Jun 4, 2015, 1:14 PM CDT (18:14 UTC)
In effect from: Jun 4, 2015, 3:00 PM CDT
Expired: Jun 5, 2015, 6:05 AM CDT
In force: 15 hr
Issued by: NWS Omaha, NE
Flood severity: None

Counties Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Butler County, NE, Cass County, NE, Douglas County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE

The radar

The Omaha radar (KOAX), 68 km from the middle of the area, began a volume at 18:14 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 12:00Z, 6.2 hours before the alert went out and 68 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: 60 J/kg
Mixed-layer CIN: -237 J/kg
Mixed-layer LCL: 1279 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -26 m²/s²
0-3 km storm-relative helicity: -7 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 4, 6:44 AM CDT, 6 hours 30 minutes earlier.

Area forecast discussion, Jun 4, 6:44 AM CDT, 6 hours 30 minutes before

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Hazardous weather outlook, Jun 4, 11:36 AM CDT, 1 hour 38 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1136 AM CDT THU JUN 4 2015

IAZ069-079-080-090-091-NEZ050>053-065>068-078-088>093-050645-
POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-PAGE-BUTLER-SAUNDERS-
DOUGLAS-SARPY-SEWARD-LANCASTER-CASS-OTOE-SALINE-JEFFERSON-GAGE-
JOHNSON-NEMAHA-PAWNEE-RICHARDSON-
1136 AM CDT THU JUN 4 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
IOWA...EAST CENTRAL NEBRASKA AND SOUTHEAST NEBRASKA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

ANOTHER ROUND OF THUNDERSTORMS WITH HEAVY RAIN IS LIKELY ACROSS
THE AREA TONIGHT. SOME STORMS MAY BE SEVERE WITH LARGE HAIL AND
DAMAGING WINDS THE PRIMARY HAZARD. ISOLATED TORNADOES ARE ALSO
POSSIBLE THIS EVENING.

A NEARLY STATIONARY SURFACE BOUNDARY REMAINS ACROSS NORTHERN
KANSAS LATE THIS MORNING AND NEW STORM DEVELOPMENT IS EXPECTED
TO TAKE PLACE LATE THIS AFTERNOON IN THE VICINITY OF NORTH
CENTRAL KANSAS WHERE BETTER INSTABILITY AND SHEAR WILL BE IN
PLACE. STORMS WILL THEN SPREAD EAST OR NORTHEAST DURING THE
EVENING AND OVERNIGHT INTO EASTERN NEBRASKA AND SOUTHWEST IOWA.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THUNDERSTORM CHANCES WILL VERY GRADUALLY DECREASE FROM NORTH TO
SOUTH THROUGH SUNDAY NIGHT OVER THE OUTLOOK AREA WHEN A
DRIER...MORE STABLE AIR MASS FILTERS IN BEHIND A COLD FRONT
PUSHING INTO THE CENTRAL PLAINS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING.

IAZ043-055-056-NEZ011-012-015>018-030>034-042>045-050645-
MONONA-HARRISON-SHELBY-KNOX-CEDAR-THURSTON-ANTELOPE-PIERCE-WAYNE-
BOONE-MADISON-STANTON-CUMING-BURT-PLATTE-COLFAX-DODGE-WASHINGTON-
1136 AM CDT THU JUN 4 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
IOWA...WEST CENTRAL IOWA...EAST CENTRAL NEBRASKA AND NORTHEAST
NEBRASKA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE WILL BE A CHANCE OF THUNDERSTORMS LATE TONIGHT ACROSS
NORTHEAST NEBRASKA INTO WEST CENTRAL IOWA. ISOLATED SEVERE STORMS
ARE POSSIBLE WITH LARGE HAIL AND DAMAGING WINDS THE PRIMARY
HAZARDS.

A NEARLY STATIONARY SURFACE BOUNDARY REMAINS ACROSS NORTHERN
KANSAS LATE THIS MORNING AND NEW STORM DEVELOPMENT IS EXPECTED
TO TAKE PLACE LATE THIS AFTERNOON IN THE VICINITY OF NORTH
CENTRAL KANSAS WHERE BETTER INSTABILITY AND SHEAR WILL BE IN
PLACE. STORMS WILL THEN SPREAD EAST OR NORTHEAST DURING THE
EVENING AND OVERNIGHT INTO EASTERN NEBRASKA AND SOUTHWEST IOWA.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THUNDERSTORM CHANCES WILL VERY GRADUALLY DECREASE FROM NORTH TO
SOUTH THROUGH SUNDAY NIGHT OVER THE OUTLOOK AREA WHEN A
DRIER...MORE STABLE AIR MASS FILTERS IN BEHIND A COLD FRONT
PUSHING INTO THE CENTRAL PLAINS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED TONIGHT.

FOBERT

In the hours before

Local storm report, Jun 4, 9:17 AM CDT, 3 hours 57 minutes before

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Local storm report, Jun 4, 9:18 AM CDT, 3 hours 56 minutes before

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Local storm report, Jun 4, 9:30 AM CDT, 3 hours 44 minutes before

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Local storm report, Jun 4, 9:31 AM CDT, 3 hours 43 minutes before

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Local storm report, Jun 4, 9:32 AM CDT, 3 hours 42 minutes before

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Local storm report, Jun 4, 9:33 AM CDT, 3 hours 41 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 4, 12:28 AM CDT	Special Weather Statement	OAX	Saline	32 min
Jun 4, 12:33 AM CDT	Special Weather Statement	OAX	Pawnee	42 min
Jun 4, 12:41 AM CDT	Severe Thunderstorm Warning	OAX	Pawnee	34 min
Jun 4, 12:57 AM CDT	Special Weather Statement	OAX	Richardson	33 min
Jun 4, 1:02 AM CDT	Special Weather Statement	OAX	Saline, Seward	43 min
Jun 4, 1:17 AM CDT	Special Weather Statement	OAX	Pawnee	28 min
Jun 4, 1:23 AM CDT	Areal Flood Advisory	OAX	Pawnee, Richardson	3 hr
Jun 4, 1:46 AM CDT	Special Weather Statement	OAX	Lancaster	44 min
Jun 4, 2:10 AM CDT	Flash Flood Warning	OAX	Richardson	3 hr
Jun 4, 2:33 AM CDT	Special Weather Statement	OAX	Richardson	42 min
Jun 4, 5:42 AM CDT	Special Weather Statement	OAX	Saline	33 min
Jun 4, 5:54 AM CDT	Severe Thunderstorm Warning	OAX	Jefferson, Saline	36 min
Jun 4, 6:29 AM CDT	Special Weather Statement	OAX	Jefferson, Saline	31 min
Jun 4, 7:01 AM CDT	Special Weather Statement	OAX	Gage, Johnson, Otoe	29 min
Jun 4, 7:03 AM CDT	Special Weather Statement	OAX	Gage	42 min
Jun 4, 7:36 AM CDT	Special Weather Statement	OAX	Nemaha, Otoe	39 min
Jun 4, 8:14 AM CDT	Special Weather Statement	OAX	Gage, Jefferson	46 min
Jun 4, 8:41 AM CDT	River Flood Warning	OAX	Saline	6 days
Jun 4, 9:00 AM CDT	Areal Flood Warning	OAX	Jefferson, Saline	3 hr
Jun 4, 9:01 AM CDT	Special Weather Statement	OAX	Gage, Pawnee	44 min
Jun 4, 9:03 AM CDT	Areal Flood Warning	OAX	Johnson, Pawnee, Richardson	3 hr
Jun 4, 10:09 AM CDT	River Flood Warning	OAX	Lancaster	35 hr
Jun 4, 10:18 AM CDT	River Flood Warning	OAX	Richardson	67 hr
Jun 4, 12:47 PM CDT	River Flood Warning	OAX	Nemaha	45 hr
Jun 4, 2:09 PM CDT	River Flood Warning	OAX	Gage	5 days
Jun 4, 3:30 PM CDT	Special Weather Statement	OAX	Saline	45 min
Jun 4, 4:33 PM CDT	Flash Flood Warning	OAX	Gage, Lancaster, Saline, Seward	4 hr
Jun 4, 4:49 PM CDT	River Flood Warning	OAX	Richardson	64 hr
Jun 4, 5:25 PM CDT	Flash Flood Warning	OAX	Johnson	3 hr
Jun 4, 6:25 PM CDT	Flash Flood Warning	OAX	Nemaha, Pawnee, Richardson	4 hr
Jun 4, 6:40 PM CDT	River Flood Advisory	OAX	Jefferson	25 hr

Nearby

Flash Flood Watches in Nebraska, 2015 Flash Flood Watches in Iowa, 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.