Alert archive / Nebraska / Flash Flood Warnings in 2016

Flash Flood Warning 18, NWS Omaha, NE

June 18, 2016Dodge County, Nebraska

NWS Omaha, NE issued this flash flood warning at Jun 18, 2016, 12:55 AM CDT for Dodge 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: Jun 18, 2016, 12:55 AM CDT (05:55 UTC)
Expired: Jun 18, 2016, 4:00 AM CDT
In force: 3 hr
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Flood severity: None

County Dodge County, NE

The radar

The Omaha radar (KOAX), 35 km from the middle of the area, began a volume at 05:56 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
Jun 18, 3:12 AM CDT	HEAVY RAIN 6.3	2 N Fremont, NE

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

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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 00:00Z, 5.9 hours before the alert went out and 35 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: 3543 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1690 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

465 
WGUS53 KOAX 180555
FFWOAX
NEC053-180900-
/O.NEW.KOAX.FF.W.0018.160618T0555Z-160618T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1255 AM CDT SAT JUN 18 2016

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DODGE COUNTY IN EAST CENTRAL NEBRASKA...

* UNTIL 400 AM CDT
    
* AT 1254 AM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. BETWEEN TWO AND THREE INCHES OF
  RAIN ARE ESTIMATED TO HAVE ALREADY FALLEN. FLASH FLOODING IS
  EXPECTED TO BEGIN SHORTLY.

ADDITIONAL RAINFALL AMOUNTS OF UP TO AN INCH ARE POSSIBLE IN THE
WARNED AREA.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 HIGHWAY 275 IN NEBRASKA BETWEEN MILE MARKERS 127 AND 153.
 HIGHWAY 30 IN NEBRASKA BETWEEN MILE MARKERS 402 AND 429.
 HIGHWAY 77 IN NEBRASKA BETWEEN MILEMARKERS 117 AND 135.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 4174 9689 4174 9646 4142 9643 4143 9656
      4144 9658 4143 9661 4144 9674 4145 9676
      4144 9680 4145 9690

$$

FOBERT

1 follow-up statement

864 
WGUS73 KOAX 180712
FFSOAX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
212 AM CDT SAT JUN 18 2016

NEC053-180900-
/O.CON.KOAX.FF.W.0018.000000T0000Z-160618T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DODGE NE-
212 AM CDT SAT JUN 18 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 AM CDT FOR
DODGE COUNTY...

AT 210 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. THROUGH 2 AM FREMONT HAD REPORTED
3.70 INCHES OF RAINFALL HAS FALLEN. FLASH FLOODING IS
LIKELY OCCURRING ACROSS THE WARNED AREA. 

ADDITIONAL RAINFALL AMOUNTS OF AROUND 1 INCH IS LIKELY OVER
SOUTHEAST DODGE COUNTY THROUGH 3 AM. 

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 HIGHWAY 275 IN NEBRASKA BETWEEN MILE MARKERS 127 AND 153.
 HIGHWAY 30 IN NEBRASKA BETWEEN MILE MARKERS 402 AND 429.
 HIGHWAY 77 IN NEBRASKA BETWEEN MILEMARKERS 117 AND 135.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 4174 9689 4174 9646 4142 9643 4143 9656
      4144 9658 4143 9661 4144 9674 4145 9676
      4144 9680 4145 9690

$$

BOUSTEAD

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 Jun 18, 12:22 AM CDT, 33 minutes earlier.

Area forecast discussion, Jun 18, 12:22 AM CDT, 33 minutes before

Area Forecast Discussion
National Weather Service Omaha/Valley NE
1222 AM CDT SAT JUN 18 2016

.SHORT TERM...(tonight through Monday)
Issued at 319 PM CDT Fri Jun 17 2016

Heat and humidity are making for rather sultry condition across
the CWA this afternoon. Surface obs were showing dew point temps
in the low/mid 70s extending along an inverted surface trof from
eastern Kansas into eastern South Dakota.

Late afternoon/Tonight...HIRES models indicate convection blooming
later this afternoon along axis of boundary layer moisture
convergence/theta-e advection...and steep mid-level lapse rates. CU
already showing up on satellite...corresponding with anticipated
thunder.  At this point...per the latest RAP13...combination of
extreme instability/effective shear/moisture rich environmental for
potential severe storms are focused over central/eastern South
Dakota. However...cannot discount a few severe storms and generous
precipitation over the northern CWA mainly before midnight.

Dry and hot conditions continue then Saturday and Sunday before the
next round of precipitation Sunday evening. Both ECM/GFS prog a
surface cold front associated with a potent vort max along the
U.S./Can border...dashing through the Dakotas toward the central
plains. Once again...given that a moisture rich environment will
be in place...the potential for generous rainfall over portions
of the CWA are quite favorable given both the ECM/GFS slow down
brunt of frontogenetic forcing through late Monday night.

.LONG TERM...(Monday night through Friday)
Issued at 319 PM CDT Fri Jun 17 2016

More agreeable conditions are progged through the extended
periods thanks to relatively cool surface high pressure enveloping
the central plains with high temps generally in the mid 80s to
around 90 Tuesday through Thursday. Dry as well heading into next
weekend.

&&

.AVIATION...(06Z TAFS for KOMA...KLNK...KOFK through 06Z Sunday)
Issued at 1220 AM CDT Sat Jun 18 2016

An area of TSRA has shifted south of KOFK, but will likely impact
the KOMA/KLNK sites through about 10Z with gusty winds and MVFR
CIGS and VISBY in the TSRA. Otherwise VFR conditions are expected
through the period with the winds become southeast after the
thunderstorms late tonight and through the day on Saturday.

&&

.OAX Watches/Warnings/Advisories...
NE...None.
IA...None.

&&

SHORT TERM...DEE
LONG TERM...DEE
AVIATION...

Hazardous weather outlook, Jun 17, 3:48 PM CDT, 9 hours 7 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
348 PM CDT FRI JUN 17 2016

IAZ043-055-069-079-090-NEZ011-012-015>018-030>034-042>045-050>053-
065>068-078-088>093-181100-
MONONA-HARRISON-POTTAWATTAMIE-MILLS-FREMONT-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-
348 PM CDT FRI JUN 17 2016

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

.DAY ONE...TONIGHT AND SATURDAY

WITH HEAT INDICES RANGING FROM 105 TO 110 DEGREES...THE HEAT
ADVISORY WILL REMAIN IN EFFECT UNTIL 7 PM.

THERE IS A CHANCE OF THUNDERSTORMS TONIGHT NORTH OF THE INTERSTATE 80
CORRIDOR.

.DAYS TWO THROUGH SEVEN...SATURDAY NIGHT THROUGH FRIDAY

THE HOT WEATHER IS FORECAST TO LAST INTO SUNDAY. HEAT INDEX
VALUES AROUND 100 ARE EXPECTED SATURDAY...WITH HEAT INDEX VALUES
IN THE LOW 100S ON SUNDAY.

THERE IS A CHANCE FOR THUNDERSTORMS SUNDAY NIGHT THROUGH MONDAY
NIGHT AS A COLD FRONT MOVES INTO THE REGION.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH SATURDAY.

IAZ056-080-091-181100-
SHELBY-MONTGOMERY-PAGE-
348 PM CDT FRI JUN 17 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST IOWA.

.DAY ONE...TONIGHT AND SATURDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SATURDAY NIGHT THROUGH FRIDAY

THE HOT WEATHER IS FORECAST TO LAST INTO SUNDAY. HEAT INDEX
VALUES AROUND 100 ARE EXPECTED SATURDAY...WITH HEAT INDEX VALUES
IN THE LOW 100S ON SUNDAY.

THERE IS A CHANCE FOR THUNDERSTORMS SUNDAY NIGHT THROUGH MONDAY
NIGHT AS A COLD FRONT MOVES INTO THE REGION.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH SATURDAY.

In the hours before

Local storm report, Jun 17, 11:02 PM CDT, 1 hour 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1102 PM CDT FRI JUN 17 2016

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

1015 PM     TSTM WND GST     WAYNE                   42.24N 97.02W
06/17/2016  M58 MPH          WAYNE              NE   ASOS

1055 PM     TSTM WND GST     WAYNE                   42.24N 97.02W
06/17/2016  M58 MPH          WAYNE              NE   ASOS

&&

DERGAN

Local storm report, Jun 17, 11:09 PM CDT, 1 hour 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1109 PM CDT FRI JUN 17 2016

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

1101 PM     TSTM WND DMG     WAYNE                   42.24N 97.02W
06/17/2016                   WAYNE              NE   TRAINED SPOTTER

            TREE LIMBS DOWN, 8 TO 12 INCH DIAMETER, SOUTH AND
            SOUTHWEST OF WAYNE.

1058 PM     TSTM WND DMG     WAYNE                   42.24N 97.02W
06/17/2016                   WAYNE              NE   TRAINED SPOTTER

            TREE LIMBS DOWN, 8 TO 12 INCH DIAMETER, SOUTH AND
            SOUTHWEST OF WAYNE.

&&

J-E.KLISH

Local storm report, Jun 17, 11:20 PM CDT, 1 hour 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1120 PM CDT FRI JUN 17 2016

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

1040 PM     TSTM WND GST     WALTHILL                42.15N 96.49W
06/17/2016  E60 MPH          THURSTON           NE   EMERGENCY MNGR

1105 PM     TSTM WND GST     WINNEBAGO               42.24N 96.47W
06/17/2016  E60 MPH          THURSTON           NE   EMERGENCY MNGR

&&

DERGAN

Local storm report, Jun 17, 11:32 PM CDT, 1 hour 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1132 PM CDT FRI JUN 17 2016

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

1016 PM     TSTM WND GST     2 WNW NIOBRARA          42.76N 98.07W
06/17/2016  M86 MPH          KNOX               NE   UNKNOWN

            GUST RECORDED ON WEATHER STATION AT NIOBRARA STATE PARK

&&

DERGAN

Local storm report, Jun 17, 11:41 PM CDT, 1 hour 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1141 PM CDT FRI JUN 17 2016

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

1115 PM     TSTM WND GST     WAYNE                   42.24N 97.02W
06/17/2016  M64 MPH          WAYNE              NE   ASOS

&&

DERGAN

Local storm report, Jun 17, 11:59 PM CDT, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
1159 PM CDT FRI JUN 17 2016

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

1115 PM     TSTM WND GST     STANTON                 41.95N 97.22W
06/17/2016  M62 MPH          STANTON            NE   EMERGENCY MNGR

            MULTIPLE POWER LINES DOWN, WITH 700 PEOPLE WITHOUT POWER.
            NUMEROUS 3 TO 6 INCH DIAMETER TREE LIMBS DOWN.

&&

J-E.KLISH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 8:47 PM CDT	Special Weather Statement	OAX	Cedar, Knox	28 min
Jun 17, 9:11 PM CDT	Special Weather Statement	OAX	Antelope, Cedar, Knox, Pierce, Thurston, Wayne	49 min
Jun 17, 9:17 PM CDT	Severe Thunderstorm Warning	OAX	Cedar, Knox	28 min
Jun 17, 9:44 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Cedar, Knox, Pierce, Wayne	31 min
Jun 17, 10:15 PM CDT	Severe Thunderstorm Warning	OAX	Thurston, Wayne	30 min
Jun 17, 10:28 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Cedar, Knox, Pierce, Wayne	47 min
Jun 17, 10:45 PM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming, Stanton, Thurston, Wayne	45 min
Jun 17, 10:51 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone, Madison, Pierce, Stanton, Wayne	39 min
Jun 17, 11:02 PM CDT	Severe Thunderstorm Warning	OAX	Thurston, Wayne	28 min
Jun 17, 11:28 PM CDT	Severe Thunderstorm Warning	OAX	Burt, Colfax, Cuming, Dodge, Stanton, Thurston and 1 more	32 min
Jun 17, 11:31 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone, Madison, Pierce, Platte	29 min
Jun 18, 12:01 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone, Colfax, Cuming, Dodge, Madison and 2 more	29 min
Jun 18, 12:18 AM CDT	Severe Thunderstorm Warning	OAX	Dodge, Douglas, Saunders	27 min
Jun 18, 1:15 AM CDT	Special Weather Statement	OAX	Douglas	45 min
Jun 18, 1:35 AM CDT	Flash Flood Warning	OAX	Dodge, Douglas, Saunders, Washington	3 hr
Jun 18, 2:25 AM CDT	Areal Flood Advisory	OAX	Colfax, Cuming, Stanton	2 hr
Jun 18, 4:04 AM CDT	Areal Flood Advisory	OAX	Dodge	3 hr
Jun 18, 4:11 AM CDT	River Flood Warning	OAX	Dodge	24 hr
Jun 18, 6:05 AM CDT	River Flood Warning	OAX	Dodge	24 hr
Jun 18, 10:48 AM CDT	Areal Flood Advisory	OAX	Colfax, Cuming, Dodge, Douglas, Saunders, Washington	6 hr
Jun 18, 12:42 PM CDT	River Flood Warning	OAX	Saunders	27 hr
Jun 18, 12:48 PM CDT	Areal Flood Advisory	OAX	Saunders	4 hr
Jun 18, 2:44 PM CDT	River Flood Warning	OAX	Saunders	24 hr
Jun 18, 4:42 PM CDT	Areal Flood Advisory	OAX	Dodge	6 hr

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.