Alert archive / Nebraska / Flash Flood Warnings in 2016

Flash Flood Warning 9, NWS Omaha, NE

May 26, 2016Gage County, Lancaster County, Saline County, Nebraska

NWS Omaha, NE issued this flash flood warning at May 26, 2016, 3:50 PM CDT for Gage County, Lancaster County, Saline County, Nebraska. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 26, 2016, 3:50 PM CDT (20:50 UTC)
Expired: May 26, 2016, 6:45 PM CDT
In force: 3 hr
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Flood severity: None

Counties Gage County, NE, Lancaster County, NE, Saline County, NE

The radar

The Omaha radar (KOAX), 91 km from the middle of the area, began a volume at 20:53 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.

What was reported inside it

Time	Report	Where	Remark
May 26, 3:54 PM CDT	FLASH FLOOD	Crete, NE	REPORTS OF FLOODED ROADS IN CRETE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this flash flood warning; the first came 4 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 8.8 hours before the alert went out and 91 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: 1783 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: -107 m²/s²
0-3 km storm-relative helicity: -78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

604 
WGUS53 KOAX 262050
FFWOAX
NEC067-109-151-262345-
/O.NEW.KOAX.FF.W.0009.160526T2050Z-160526T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
350 PM CDT THU MAY 26 2016

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN SALINE COUNTY IN SOUTHEASTERN NEBRASKA...
  NORTHWESTERN GAGE COUNTY IN SOUTHEASTERN NEBRASKA...
  SOUTHWESTERN LANCASTER COUNTY IN SOUTHEASTERN NEBRASKA...

* UNTIL 645 PM CDT
    
* AT 350 PM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. OVER TWO INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CRETE...WILBER...CLATONIA...HALLAM...SPRAGUE...
  BLUESTEM STATE RECREATION AREA...
  OLIVE CREEK STATE RECREATION AREA AND WALNUT CREEK RECREATION AREA.

THIS INCLUDES HIGHWAY 77 IN NEBRASKA NEAR MILEMARKER 51.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

&&

LAT...LON 4052 9709 4070 9694 4070 9691 4073 9691
      4066 9680 4067 9669 4042 9685

$$

DERGAN

1 follow-up statement

032 
WGUS73 KOAX 262343
FFSOAX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
643 PM CDT THU MAY 26 2016

NEC067-109-151-262352-
/O.EXP.KOAX.FF.W.0009.000000T0000Z-160526T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SALINE NE-GAGE NE-LANCASTER NE-
643 PM CDT THU MAY 26 2016

...THE FLASH FLOOD WARNING FOR NORTHEASTERN SALINE...NORTHWESTERN
GAGE AND SOUTHWESTERN LANCASTER COUNTIES WILL EXPIRE AT 645 PM CDT...

FLOOD WATERS HAVE RECEDED...AND ARE NO LONGER EXPECTED TO POSE A
THREAT TO LIFE OR PROPERTY. ADDITIONAL SHOWERS AND STORMS WILL BE
POSSIBLE OVERNIGHT WHICH WILL BRING MORE RAIN...BUT THE NEW RAIN
WILL NOT FALL AS FAST AND HEAVY AS IT PREVIOUSLY DID. 

LAT...LON 4052 9709 4070 9694 4070 9691 4073 9691
      4066 9680 4067 9669 4042 9685

$$

DEWALD

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 26, 2:23 PM CDT, 1 hour 27 minutes earlier.

Area forecast discussion, May 26, 2:23 PM CDT, 1 hour 27 minutes before

Area Forecast Discussion
National Weather Service Omaha/Valley NE
223 PM CDT THU MAY 26 2016

.SHORT TERM...(tonight through Sunday)
Issued at 220 PM CDT Thu May 26 2016

Warm front was located across northeast Kansas at 19z with a large
area of convection blooming on either side of the front. Periods
of thunderstorms are expected through most of the period as upper
trough over the southern Rockies this afternoon lifts across the
plains region toward the upper Midwest through Saturday. There
looks to be a brief break in the stormy pattern late Saturday
night into Sunday behind the trough but additional storms return
by Monday.

Flash flood watch will cover parts of southeast Nebraska and
southwest Iowa near the warm front through tonight with potential
for several rounds of thunderstorms and heavy rain.

.LONG TERM...(Sunday night through Thursday)
Issued at 220 PM CDT Thu May 26 2016

Upper pattern becomes more amplified again in the extended period
with more storm chances into at least Wednesday although ECMWF is
a bit quicker with drier conditions by Tuesday night compared to
the GFS.

&&

.AVIATION...(18Z TAFS for KOMA...KLNK...KOFK through 18Z Friday)
Issued at 1250 PM CDT Thu May 26 2016

Showers and thunderstorms will begin to pop up across the region
this afTernoon. Storms could begin in KLNK as early at 19Z and
move into KOMA and KOFK later this afternoon and evening. Showers
and thunderstorms will continue well into the overnight hours
before clearing and potentially allowing light fog to develop
early Friday morning.

&&

.OAX Watches/Warnings/Advisories...
NE...Flash Flood Watch through Friday morning for NEZ066-068-078-
     088>093.

IA...Flash Flood Watch through Friday morning for IAZ090-091.

&&

SHORT TERM...Fobert
LONG TERM...Fobert
AVIATION...KG

Hazardous weather outlook, May 26, 11:59 AM CDT, 3 hours 51 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1159 AM CDT THU MAY 26 2016

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-270700-
MONONA-HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-
PAGE-KNOX-CEDAR-THURSTON-ANTELOPE-PIERCE-WAYNE-BOONE-MADISON-
STANTON-CUMING-BURT-PLATTE-COLFAX-DODGE-WASHINGTON-BUTLER-
SAUNDERS-DOUGLAS-SARPY-SEWARD-LANCASTER-CASS-OTOE-SALINE-
JEFFERSON-GAGE-JOHNSON-NEMAHA-PAWNEE-RICHARDSON-
1159 AM CDT THU MAY 26 2016

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE IS AN ENHANCED RISK OF SEVERE WEATHER TODAY AND TONIGHT ACROSS
MUCH OF THE REGION...ESPECIALLY ACROSS SOUTHERN NEBRASKA. A WARM
FRONT WILL LIFT NORTHWARD INTO THE AREA TODAY. THUNDERSTORMS ARE
EXPECTED TO DEVELOP ALONG THE FRONTAL BOUNDARY BEGINNING EARLY
THIS AFTERNOON...THEN LIFTING NORTH THROUGH THE AREA OVERNIGHT.
ALL MODES OF SEVERE WEATHER WILL BE POSSIBLE TODAY...INCLUDING
DAMAGING WINDS...VERY LARGE HAIL UP TO GOLF BALL SIZE OR
LARGER...AND EVEN TORNADOES IF STORMS ARE ABLE TO DEVELOP DIRECTLY
ON OR SOUTH OF THE WARM FRONT. SOME STORMS COULD PRODUCE VERY
HEAVY RAINFALL AS WELL...ESPECIALLY SOUTH OF INTERSTATE 80. STORM
CHANCES BEGIN TO DIMINISH AFTER MIDNIGHT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THUNDERSTORM CHANCES REMAIN IN THE FORECAST JUST ABOUT EVERY DAY
THROUGH THE PERIOD.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED ACROSS PORTIONS OF THE
AREA TODAY AND TONIGHT.

In the hours before

Local storm report, May 26, 3:02 PM CDT, 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
302 PM CDT THU MAY 26 2016

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

0302 PM     HAIL             7 S FRIEND              40.55N 97.28W
05/26/2016  E0.75 INCH       SALINE             NE   TRAINED SPOTTER

&&

PEARSON

Local storm report, May 26, 3:03 PM CDT, 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
303 PM CDT THU MAY 26 2016

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

0303 PM     HAIL             NEBRASKA CITY           40.68N 95.86W
05/26/2016  E0.75 INCH       OTOE               NE   TRAINED SPOTTER

&&

PEARSON

Local storm report, May 26, 3:14 PM CDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
314 PM CDT THU MAY 26 2016

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

0313 PM     FLOOD            3 S LINCOLN             40.77N 96.69W
05/26/2016                   LANCASTER          NE   TRAINED SPOTTER

            WATER REPORTED OVER PORTIONS OF HIGHWAY 77.

&&

PEARSON

Special weather statement, May 26, 3:20 PM CDT, 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
320 PM CDT THU MAY 26 2016

IAZ079-080-090-091-NEZ067-068-262100-
FREMONT IA-PAGE IA-MILLS IA-MONTGOMERY IA-CASS NE-OTOE NE-
320 PM CDT THU MAY 26 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN MONTGOMERY...
SOUTHEASTERN MILLS...WEST CENTRAL PAGE...NORTHERN FREMONT...
SOUTHEASTERN CASS AND NORTHEASTERN OTOE COUNTIES UNTIL 400 PM CDT...

AT 320 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
NEAR SIDNEY...OR 28 MILES NORTHWEST OF TARKIO...MOVING NORTHEAST AT
40 MPH.

DIME SIZE HAIL HAS BEEN REPORTED AND WINDS IN EXCESS OF 30 MPH WILL
BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
SHENANDOAH...SIDNEY...TABOR...THURMAN...RANDOLPH AND IMOGENE.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 HIGHWAY 59 IN IOWA BETWEEN MILE MARKERS 16 AND 22.
 INTERSTATE 29 BETWEEN MILE MARKERS 10 AND 17.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FOR SOUTHWESTERN
IOWA...AND SOUTHEASTERN NEBRASKA.

LAT...LON 4068 9579 4076 9588 4099 9557 4093 9538
      4077 9538
TIME...MOT...LOC 2020Z 236DEG 35KT 4077 9571

KG

Local storm report, May 26, 3:26 PM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
326 PM CDT THU MAY 26 2016

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

0325 PM     FLASH FLOOD      LINCOLN                 40.82N 96.69W
05/26/2016                   LANCASTER          NE   AMATEUR RADIO

            THREE INCHES OF WATER FLOWING OVER ROAD ON 56TH STREET
            SOUTH OF HIGHWAY 2

&&

DERGAN

Local storm report, May 26, 3:40 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
340 PM CDT THU MAY 26 2016

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

0339 PM     FLASH FLOOD      LINCOLN                 40.82N 96.69W
05/26/2016                   LANCASTER          NE   BROADCAST MEDIA

            MANY INTERSECTIONS IN SOUTHEAST LINCOLN FLOODED AND
            IMPASSIBLE.

&&

PEARSON

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 25, 8:13 PM CDT	Severe Thunderstorm Warning	OAX	Knox	32 min
May 25, 8:42 PM CDT	Severe Thunderstorm Warning	OAX	Knox	33 min
May 25, 9:10 PM CDT	Severe Thunderstorm Warning	OAX	Cedar, Knox	35 min
May 25, 9:36 PM CDT	Severe Thunderstorm Warning	OAX	Cedar, Knox	24 min
May 25, 9:54 PM CDT	Special Weather Statement	OAX	Pierce	36 min
May 25, 9:56 PM CDT	Severe Thunderstorm Warning	OAX	Cedar	34 min
May 25, 9:59 PM CDT	Severe Thunderstorm Warning	OAX	Cedar, Knox, Pierce	31 min
May 25, 10:27 PM CDT	Severe Thunderstorm Warning	OAX	Cedar, Knox, Pierce, Wayne	33 min
May 25, 10:42 PM CDT	Special Weather Statement	OAX	Lancaster	48 min
May 25, 10:44 PM CDT	Special Weather Statement	OAX	Richardson	31 min
May 25, 10:52 PM CDT	Special Weather Statement	OAX	Boone	38 min
May 25, 10:55 PM CDT	Severe Thunderstorm Warning	OAX	Cedar, Wayne	35 min
May 25, 11:18 PM CDT	Special Weather Statement	OAX	Boone	27 min
May 25, 11:27 PM CDT	Severe Thunderstorm Warning	OAX	Cedar, Wayne	33 min
May 25, 11:36 PM CDT	Special Weather Statement	OAX	Platte	39 min
May 25, 11:42 PM CDT	Severe Thunderstorm Warning	OAX	Madison, Platte	33 min
May 25, 11:57 PM CDT	Severe Thunderstorm Warning	OAX	Wayne	33 min
May 26, 12:06 AM CDT	Special Weather Statement	OAX	Butler, Colfax, Dodge, Saunders, Seward	39 min
May 26, 12:12 AM CDT	Special Weather Statement	OAX	Stanton	33 min
May 26, 12:36 AM CDT	Special Weather Statement	OAX	Lancaster	24 min
May 26, 12:40 AM CDT	Special Weather Statement	OAX	Burt, Cuming, Dodge, Douglas, Sarpy, Washington	35 min
May 26, 12:49 AM CDT	Severe Thunderstorm Warning	OAX	Dodge, Douglas, Saunders, Washington	26 min
May 26, 12:54 AM CDT	Special Weather Statement	OAX	Thurston	51 min
May 26, 12:58 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Dodge, Washington	32 min
May 26, 1:07 AM CDT	Severe Thunderstorm Warning	OAX	Douglas, Washington	23 min
May 26, 1:19 AM CDT	Severe Thunderstorm Warning	OAX	Burt	26 min
May 26, 1:22 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Thurston	23 min
May 26, 1:22 PM CDT	Flash Flood Watch	OAX	Cass, Gage, Jefferson, Johnson, Lancaster, Nemaha and 4 more	14 hr
May 26, 1:50 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Saline	25 min
May 26, 2:14 PM CDT	Severe Thunderstorm Warning	OAX	Otoe	31 min
May 26, 2:15 PM CDT	Severe Thunderstorm Warning	OAX	Saline, Seward	30 min
May 26, 2:19 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Saline, Seward	26 min
May 26, 2:42 PM CDT	Severe Thunderstorm Warning	OAX	Saline, Seward	33 min
May 26, 3:09 PM CDT	Severe Thunderstorm Warning	OAX	Saline	36 min
May 26, 3:10 PM CDT	Flash Flood Warning	OAX	Lancaster	5 hr
May 26, 3:13 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Lancaster, Saline	32 min
May 26, 3:17 PM CDT	Flash Flood Warning	OAX	Saline, Seward	3 hr
May 26, 3:39 PM CDT	Tornado Warning	OAX	Gage, Lancaster	25 min
May 26, 3:42 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Saline	33 min
May 26, 3:50 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Otoe	25 min
May 26, 4:03 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Lancaster	27 min
May 26, 4:11 PM CDT	Flash Flood Warning	OAX	Cass, Otoe	3 hr
May 26, 4:27 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Otoe	33 min
May 26, 4:32 PM CDT	Special Weather Statement	OAX	Gage, Jefferson	43 min
May 26, 4:40 PM CDT	Tornado Warning	OAX	Johnson, Nemaha, Otoe	35 min
May 26, 4:45 PM CDT	Flash Flood Warning	OAX	Cass, Lancaster, Otoe	3 hr
May 26, 5:04 PM CDT	Flash Flood Warning	OAX	Otoe	3 hr
May 26, 5:10 PM CDT	Tornado Warning	OAX	Nemaha, Otoe	23 min

Nearby

Flash Flood Warnings in Nebraska, 2016 Every flash flood warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.