Alert archive / Iowa / Flash Flood Warnings in 2016
Flash Flood Warning 13, NWS Omaha, NE
NWS Omaha, NE issued this flash flood warning at May 26, 2016, 4:49 PM CDT for Fremont County, Mills County, Iowa. It was in force for 3 hr. 2 reports 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, 4:49 PM CDT (21:49 UTC)
- Expired
- May 26, 2016, 7:45 PM CDT
- In force
- 3 hr
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Flood severity
- None
Counties Fremont County, IA, Mills County, IA
The radar
The Omaha radar (KOAX), 78 km from the middle of the area, began a volume at 21:53 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, 6:36 PM CDT | FLASH FLOOD | 5 S Thurman, IA | FLOODED ROAD ALONG 220TH AVENUE NEAR PERCIVAL. |
| May 26, 6:36 PM CDT | FLASH FLOOD | Tabor, IA | FLOODED ROAD ALONG GREEN HOLLOW ROAD. |
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, 9.8 hours before the alert went out and 78 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.
- 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
The text
As transmitted.
047
WGUS53 KOAX 262149
FFWOAX
IAC071-129-270045-
/O.NEW.KOAX.FF.W.0013.160526T2149Z-160527T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
449 PM CDT THU MAY 26 2016
THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN MILLS COUNTY IN SOUTHWESTERN IOWA...
NORTHERN FREMONT COUNTY IN SOUTHWESTERN IOWA...
* UNTIL 745 PM CDT
* AT 449 PM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. MORE THAN TWO INCHES OF RAIN
HAVE ALREADY FALLEN WITH ANOTHER INCH OR TWO LIKELY FLASH FLOODING
IS EXPECTED TO BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SIDNEY...TABOR...THURMAN...RANDOLPH AND IMOGENE.
THIS INCLUDES INTERSTATE 29 BETWEEN MILE MARKERS 12 AND 20.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
&&
LAT...LON 4071 9554 4070 9585 4072 9589 4074 9589
4078 9584 4079 9584 4081 9585 4084 9584
4087 9585 4088 9582 4096 9548 4088 9541
$$
DERGAN2 follow-up statements
005
WGUS73 KOAX 262340
FFSOAX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
640 PM CDT THU MAY 26 2016
IAC071-129-270045-
/O.CON.KOAX.FF.W.0013.000000T0000Z-160527T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MILLS IA-FREMONT IA-
640 PM CDT THU MAY 26 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
SOUTHEASTERN MILLS AND NORTHERN FREMONT COUNTIES...
AT 638 PM CDT...LOCAL LAW ENFORCEMENT REPORTED A COUPLE OF FLOODED
ROADS NEAR PERCIVAL AND ALSO NEAR TABOR DUE TO HEAVY THUNDERSTORMS
THAT HAVE MOVED THROUGH THE AREA. UP TO THREE INCHES OF RAIN MAY
HAVE ALREADY FALLEN ACROSS THE AREA. ADDITIONAL SHOWERS AND
THUNDERSTORMS WILL BE POSSIBLE THIS EVENING AND OVERNIGHT...BUT THE
NEW RAIN SHOULD NOT FALL AS HEAVY AND FAST AS IT DID PREVIOUSLY.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SIDNEY...TABOR...THURMAN...RANDOLPH AND IMOGENE.
THIS INCLUDES INTERSTATE 29 BETWEEN MILE MARKERS 12 AND 20.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
&&
LAT...LON 4071 9554 4070 9585 4072 9589 4074 9589
4078 9584 4079 9584 4081 9585 4084 9584
4087 9585 4088 9582 4096 9548 4088 9541
$$
DEWALD180
WGUS73 KOAX 270043
FFSOAX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
743 PM CDT THU MAY 26 2016
IAC071-129-270051-
/O.EXP.KOAX.FF.W.0013.000000T0000Z-160527T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MILLS IA-FREMONT IA-
743 PM CDT THU MAY 26 2016
...THE FLASH FLOOD WARNING FOR SOUTHEASTERN MILLS AND NORTHERN
FREMONT COUNTIES WILL EXPIRE AT 745 PM CDT...
FLOOD WATERS WILL CONTINUE TO RECEDE...AND ARE NO LONGER EXPECTED TO
POSE A THREAT TO LIFE OR PROPERTY. PLEASE CONTINUE TO HEED ANY ROAD
CLOSURES NEAR PERCIVAL OR TABOR. ADDITIONAL SHOWERS AND
THUNDERSTORMS WILL BE POSSIBLE THIS EVENING AND OVERNIGHT...BUT THE
NEW RAIN WILL NOT BE AS HEAVY AND FAST AS IT WAS EARLIER IN THE DAY.
LAT...LON 4071 9554 4070 9585 4072 9589 4074 9589
4078 9584 4079 9584 4081 9585 4084 9584
4087 9585 4088 9582 4096 9548 4088 9541
$$
DEWALDThe office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 12:03 AM CDT | Severe Thunderstorm Warning | OAX | Page | 27 min |
| May 26, 12:33 AM CDT | Special Weather Statement | OAX | Page | 42 min |
| May 26, 1:07 AM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 23 min |
| May 26, 1:19 AM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 26 min |
| May 26, 1:22 AM CDT | Severe Thunderstorm Warning | OAX | Monona | 23 min |
| May 26, 1:34 AM CDT | Special Weather Statement | OAX | Fremont, Harrison, Mills, Pottawattamie | 41 min |
| May 26, 1:46 AM CDT | Special Weather Statement | OAX | Montgomery | 29 min |
| May 26, 2:15 AM CDT | Special Weather Statement | OAX | Montgomery | 30 min |
| May 26, 1:22 PM CDT | Flash Flood Watch | OAX | Fremont, Mills, Montgomery, Page, Pottawattamie | 14 hr |
| May 26, 2:20 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Page | 25 min |
| May 26, 2:42 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Page | 21 min |
| May 26, 3:20 PM CDT | Special Weather Statement | OAX | Fremont | 40 min |
| May 26, 3:54 PM CDT | Areal Flood Advisory | OAX | Fremont, Page | 3 hr |
| May 26, 4:31 PM CDT | Flash Flood Warning | OAX | Pottawattamie | 3 hr |
| May 26, 5:21 PM CDT | Special Weather Statement | OAX | Fremont | 39 min |
Nearby
Flash Flood Warnings in Iowa, 2016Every 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.