Alert archive / Nebraska / Flash Flood Warnings in 2012

Flash Flood Warning 3, NWS Omaha, NE

April 14, 20124 counties in Nebraska

NWS Omaha, NE issued this flash flood warning at Apr 14, 2012, 2:01 PM CDT for 4 counties in Nebraska. It was in force for 119 min. 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: Apr 14, 2012, 2:01 PM CDT (19:01 UTC)
Expired: Apr 14, 2012, 4:00 PM CDT
In force: 119 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Flood severity: None

Counties Cuming County, NE, Stanton County, NE, Thurston County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 98 km from the middle of the area, began a volume at 19:03 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
Apr 14, 3:30 PM CDT	FLASH FLOOD	Pender, NE	WATER OVER HIGHWAY 9 SOUTH OF PENDER.

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

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 7.0 hours before the alert went out and 98 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: 1847 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

170 
WGUS53 KOAX 141901
FFWOAX
NEC039-167-173-179-142100-
/O.NEW.KOAX.FF.W.0003.120414T1901Z-120414T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
201 PM CDT SAT APR 14 2012

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WAYNE COUNTY IN NORTHEASTERN NEBRASKA...
  THURSTON COUNTY IN NORTHEASTERN NEBRASKA...
  NORTH CENTRAL CUMING COUNTY IN EASTERN NEBRASKA...
  STANTON COUNTY IN EASTERN NEBRASKA...

* UNTIL 400 PM CDT

* AT 159 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
  HEAVY RAIN ACROSS THE WARNED AREA.  FLASH FLOODING IS EXPECTED TO 
  BEGIN SHORTLY. THESE THUNDERSTORMS HAVE A HISTORY OF PRODUCING 
  FLASH FLOODING.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  WAYNE...STANTON...WISNER...PENDER...MACY...WALTHILL...WINNEBAGO...
  WINSIDE...PILGER...ROSALIE AND THURSTON. 

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 HIGHWAY 275 BETWEEN MILE MARKERS 87 AND 101.
 HIGHWAY 77 BETWEEN MILE MARKERS 159 AND 169.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO 
CROSS SAFELY.  MOVE TO HIGHER GROUND.

&&

LAT...LON 4225 9632 4223 9633 4221 9635 4218 9635
      4213 9631 4211 9627 4207 9628 4193 9734
      4220 9728 4227 9692 4226 9673 4228 9672
      4228 9635

$$

PEARSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 14, 9:47 AM CDT	Special Weather Statement	OAX	Gage, Jefferson, Saline	58 min
Apr 14, 10:50 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson, Saline	25 min
Apr 14, 11:15 AM CDT	Special Weather Statement	OAX	Gage	30 min
Apr 14, 11:49 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone	26 min
Apr 14, 12:08 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone, Madison, Pierce	37 min
Apr 14, 12:39 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone, Madison, Pierce	36 min
Apr 14, 1:08 PM CDT	Severe Thunderstorm Warning	OAX	Madison, Pierce, Stanton, Wayne	37 min
Apr 14, 1:43 PM CDT	Severe Thunderstorm Warning	OAX	Cuming, Stanton, Thurston, Wayne	32 min
Apr 14, 1:45 PM CDT	Flash Flood Warning	OAX	Cass	60 min
Apr 14, 1:53 PM CDT	Flash Flood Warning	OAX	Madison, Pierce, Stanton, Wayne	2 hr
Apr 14, 2:16 PM CDT	Special Weather Statement	OAX	Cuming, Thurston	44 min
Apr 14, 2:20 PM CDT	Special Weather Statement	OAX	Jefferson	25 min
Apr 14, 3:00 PM CDT	Special Weather Statement	OAX	Saline	30 min
Apr 14, 3:09 PM CDT	Severe Thunderstorm Warning	OAX	Jefferson, Saline	51 min
Apr 14, 3:32 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Pawnee	28 min
Apr 14, 3:53 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	22 min
Apr 14, 4:00 PM CDT	Flash Flood Warning	OAX	Gage, Jefferson, Lancaster, Saline	3 hr
Apr 14, 4:00 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha	30 min
Apr 14, 4:17 PM CDT	Areal Flood Advisory	OAX	Butler	3 hr
Apr 14, 4:26 PM CDT	Special Weather Statement	OAX	Gage, Johnson, Otoe	34 min
Apr 14, 4:30 PM CDT	Flash Flood Warning	OAX	Lancaster	3 hr
Apr 14, 4:43 PM CDT	Areal Flood Advisory	OAX	Cass, Gage, Johnson, Lancaster, Otoe	2 hr
Apr 14, 4:46 PM CDT	Areal Flood Advisory	OAX	Johnson, Nemaha, Otoe	2 hr
Apr 14, 4:48 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Otoe	27 min
Apr 14, 5:11 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha, Otoe	34 min
Apr 14, 5:14 PM CDT	Tornado Warning	OAX	Nemaha, Otoe	31 min
Apr 14, 5:24 PM CDT	Tornado Warning	OAX	Otoe	24 min
Apr 14, 5:35 PM CDT	Severe Thunderstorm Warning	OAX	Cass	25 min

Nearby

Flash Flood Warnings in Nebraska, 2012 Every flash flood warning in 2012

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.