Alert archive / Nebraska / Flash Flood Warnings in 2007
Flash Flood Warning 13, NWS Omaha, NE
NWS Omaha, NE issued this flash flood warning at May 6, 2007, 1:14 AM CDT for Jefferson County, Nebraska. It was in force for 2 hr. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 6, 2007, 1:14 AM CDT (06:14 UTC)
- Expired
- May 6, 2007, 3:15 AM CDT
- In force
- 2 hr
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Jefferson County, NE
The radar
The Grand Island radar (KUEX), 111 km from the middle of the area, began a volume at 06:14 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 6, 1:50 AM CDT | FLASH FLOOD | N Diller, NE | 8 INCHES OF WATER FLOWING ACROSS HWY 103. |
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 00:00Z, 6.2 hours before the alert went out and 143 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
- 2431 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 1133 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 7.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KOAX 060616 FFWOAX NEC095-060815- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 114 AM CDT SUN MAY 6 2007 THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A * FLASH FLOOD WARNING FOR... JEFFERSON COUNTY IN SOUTHEAST NEBRASKA... * UNTIL 315 AM CDT * AT 109 AM CDT...EMERGENCY MANAGEMENT OFFICIALS REPORTED FLASH FLOODING FROM A COMPLEX OF THUNDERSTORMS OVER THE WARNED AREA. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO JANSEN AND DAYKIN. MANY STREETS IN FAIRBURY HAD BEEN REPORTED TO BE EXPERIENCING FLOODING AS WELL AS 1.30 INCHES OF RAIN OVER THE LAST 40 MINUTES. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR IS ALREADY OCCURRING. IF YOU ARE IN THE WARNED AREA...MOVE TO HIGHER GROUND IMMEDIATELY. IF YOU LIVE ALONG A STREAM OR A CREEK IN THE AFFECTED AREA...TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF AN UNKNOWN DEPTH BY FOOT...OR BY AUTOMOBILE. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. IN ADDITION...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY AND MOVE TO HIGHER GROUND. LAT...LON 4000 9735 4001 9700 4033 9700 4033 9732 $$ JR
2 follow-up statements
000 WGUS73 KOAX 060702 FFSOAX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 159 AM CDT SUN MAY 6 2007 NEC095-060815- JEFFERSON NE- 159 AM CDT SUN MAY 6 2007 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 AM CDT FOR JEFFERSON COUNTY... AT 155 AM CDT...LOCAL EMERGENCY MANAGEMENT OFFICIALS REPORTED 8.0 INCHES OF WATER FLOWING OVER HIGHWAY 1.03...ONE HALF MILE NORTH OF DILLER. 1.90 INCHES OF RAINFALL HAD ALSO FALLEN IN FAIRBURY OVER THE LAST HOUR. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO JANSEN AND DAYKIN. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. COUNTRY ROADS AND FARMLAND ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE ALSO SUBJECT TO FLOODING. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. LAT...LON 4000 9735 4001 9700 4033 9700 4033 9732 $$ JR
000 WGUS73 KOAX 060807 FFSOAX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 304 AM CDT SUN MAY 6 2007 NEC095-060815- JEFFERSON NE- 304 AM CDT SUN MAY 6 2007 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 315 AM CDT FOR JEFFERSON COUNTY... AT 259 AM CDT...THUNDERSTORMS HAVE GENERALLY MOVED NORTHEAST OUT OF THE WARNED AREA. STREET FLOODING HAS SUBSIDED IN FAIRBURY. AREA CREEKS HAVE BEGAN SHOWING SIGNS OF RECEEDING. THEREFORE...THE WARNING WILL BE ALLOWED TO EXPIRE AT 315 AM CDT FOR JEFFERSON COUNTY. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. LAT...LON 4000 9735 4001 9700 4033 9700 4033 9732 $$ JR
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 7:13 PM CDT | Flash Flood Warning | OAX | Dodge, Washington | 2 hr |
| May 5, 7:13 PM CDT | Severe Thunderstorm Warning | OAX | Saunders | 32 min |
| May 5, 7:27 PM CDT | Severe Thunderstorm Warning | OAX | Dodge, Washington | 33 min |
| May 5, 7:34 PM CDT | Severe Thunderstorm Warning | OAX | Burt | 56 min |
| May 5, 8:03 PM CDT | Flash Flood Warning | OAX | Burt | 117 min |
| May 5, 9:42 PM CDT | Severe Thunderstorm Warning | OAX | Boone | 33 min |
| May 5, 9:51 PM CDT | Severe Thunderstorm Warning | OAX | Douglas, Washington | 24 min |
| May 5, 10:11 PM CDT | Severe Thunderstorm Warning | OAX | Otoe | 34 min |
| May 5, 10:49 PM CDT | Severe Thunderstorm Warning | OAX | Nemaha, Otoe | 41 min |
| May 5, 10:53 PM CDT | Severe Thunderstorm Warning | OAX | Pawnee | 37 min |
| May 5, 11:22 PM CDT | Severe Thunderstorm Warning | OAX | Douglas, Sarpy | 23 min |
| May 5, 11:24 PM CDT | Severe Thunderstorm Warning | OAX | Otoe | 36 min |
| May 5, 11:34 PM CDT | Severe Thunderstorm Warning | OAX | Knox | 41 min |
| May 5, 11:44 PM CDT | Severe Thunderstorm Warning | OAX | Pawnee | 46 min |
| May 6, 12:19 AM CDT | Severe Thunderstorm Warning | OAX | Dodge | 41 min |
| May 6, 12:32 AM CDT | Flash Flood Warning | OAX | Gage, Johnson, Otoe, Pawnee | 118 min |
| May 6, 1:01 AM CDT | Severe Thunderstorm Warning | OAX | Gage, Jefferson | 59 min |
| May 6, 1:06 AM CDT | Flash Flood Warning | OAX | Cass, Sarpy | 114 min |
| May 6, 4:14 AM CDT | Flash Flood Warning | OAX | Sarpy | 2 hr |
Nearby
Flash Flood Warnings in Nebraska, 2007Every flash flood warning in 2007
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.