Alert archive / Nebraska / Flash Flood Warnings in 2019

Flash Flood Warning 30, NWS Omaha, NE

May 28, 2019Nemaha County, Pawnee County, Richardson County, Nebraska

NWS Omaha, NE issued this flash flood warning at May 28, 2019, 8:51 PM CDT for Nemaha County, Pawnee County, Richardson County, Nebraska. It was in force for 6 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: May 28, 2019, 8:51 PM CDT (01:51 UTC)
Expired: May 29, 2019, 2:45 AM CDT
In force: 6 hr
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Flood severity: None

Counties Nemaha County, NE, Pawnee County, NE, Richardson County, NE

The radar

The Omaha radar (KOAX), 128 km from the middle of the area, began a volume at 01:53 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, 1.9 hours before the alert went out and 128 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: 645 m above ground
0-6 km bulk shear: 80 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 124 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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 May 28, 4:47 PM CDT, 4 hours 4 minutes earlier.

Area forecast discussion, May 28, 4:47 PM CDT, 4 hours 4 minutes before

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Hazardous weather outlook, May 28, 5:44 PM CDT, 3 hours 7 minutes before

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In the hours before

Local storm report, May 28, 3:47 PM CDT, 5 hours 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
347 PM CDT TUE MAY 28 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0320 PM     HAIL             2 ESE FALLS CITY        40.06N 95.56W
05/28/2019  E1.00 INCH       RICHARDSON         NE   PUBLIC

            1.20 OF RAIN ALSO.

&&

DEWALD

Local storm report, May 28, 4:05 PM CDT, 4 hours 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
405 PM CDT TUE MAY 28 2019

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0330 PM     FLOOD            1 WSW LINCOLN           40.81N 96.71W
05/28/2019                   LANCASTER          NE   LAW ENFORCEMENT

            SEVERAL ROADS STILL IMPACTED IN LINCOLN WITH
            HIGH WATER FROM THIS MORNING.

&&

DEWALD

Local storm report, May 28, 4:29 PM CDT, 4 hours 22 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
May 28, 7:05 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	55 min
May 28, 7:53 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	67 min
May 28, 7:57 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Pawnee, Richardson	31 min
May 28, 8:06 PM CDT	Areal Flood Warning	OAX	Richardson	49 min
May 28, 8:15 PM CDT	Areal Flood Warning	OAX	Nemaha, Richardson	39 min
May 28, 8:34 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson, Pawnee	41 min
May 28, 9:04 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Johnson, Otoe	21 min
May 28, 9:11 PM CDT	Severe Thunderstorm Warning	OAX	Pawnee, Richardson	49 min
May 28, 9:46 PM CDT	Severe Thunderstorm Warning	OAX	Richardson	32 min
May 29, 1:12 AM CDT	River Flood Warning	OAX	Gage	51 hr
May 29, 8:53 AM CDT	River Flood Warning	OAX	Sarpy, Saunders	34 hr

Nearby

Flash Flood Warnings in Nebraska, 2019 Every flash flood warning in 2019

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.