Alert archive / Nebraska / Flash Flood Warnings in 1993
Flash Flood Warning 49, NWS Omaha, NE
NWS Omaha, NE issued this flash flood warning at Jul 23, 1993, 10:56 PM CDT for Nemaha County, Nebraska. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Jul 23, 1993, 10:56 PM CDT (03:56 UTC)
- Expired
- Jul 24, 1993, 4:00 AM CDT
- In force
- 5 hr
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Nemaha County, NE
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 3.9 hours before the alert went out and 112 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
- 465 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 966 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 131 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KOMA 240356 FFWOMA NEC127-240900- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE OMAHA NE 1056 PM CDT FRI JUL 23 1993 THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 430 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST NEBRASKA ...NEMAHA COUNTY AT 10 55 PM CDT NATIONAL WEATHER SERVICE RADAR SHOWED VERY HEAVY THUNDERSTORMS ROLLING ACROSS NEMAHA COUNTY...WHERE THE LITTLE NEMAHA RIVER IS ALREADY IN FLOOD. THERE IS ALSO THE POSSIBILITY OF A LEVEE FAILURE NEAR THE TOWN OF NEMAHA. THUNDERSTORMS WITH VERY HEAVY RAINS ARE EXPECTED TO CONTINUE FOR THE NEXT FEW HOURS. LISTEN FOR LATER STATEMENTS. A FLASH FLOOD WARNING MEANS THAT FLASH FLOODING IS IMMINENT OR HAS BEEN REPORTED. RESIDENTS SHOULD TAKE IMMEDIATE PRECAUTIONS. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS BY FOOT OR BY AUTO. DO NOT ATTEMPT TO DRIVE OVER A ROAD COVERED BY WATER. THE ROAD@ COULD BE WASHED OUT UNDER THE WATER SURFACE OR YOUR CAR COULD BE SWEPT AWAY IF WATER IS FLOWING SWIFTLY. BYRD
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.
In the hours before
Special weather statement, Jul 23, 8:30 PM CDT, 2 hours 26 minutes before
NEZ015-019-020-240230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LINCOLN NE 830 PM CDT FRI JUL 23 1993 ...FLASH FLOOD WATCH FOR SOUTHEAST NEBRASKA TONIGHT... ...STRONG THUNDERSTORMS DEVELOPING ACROSS PAWNEE COUNTY... AT 820 PM RADAR INDICATED A AREA OF DEVELOPING THUNDERSTORMS ACROSS SOUTHEAST NEBRASKA. THE THUNDERSTORMS WERE IN AN AREA FROM EAST OF HUMBOLDT TO BAILYVILLE KANSAS. MOVEMENT WAS TO THE NORTHEAST AT 15 MPH. A FLASH FLOOD WATCH IS IN EFFECT FOR SOUTHEAST NEBRASKA TONIGHT. ANY ADDITIONAL HEAVY RAINS COULD AGGREVATE FLOODING PROBLEMS. IF FLOODING IS OBSERVED OR A WARNING IS ISSUED...MOVE TO HIGHER GROUND IMMEDIATELY. LISTEN FOR LATER STATEMENTS. ZELL
Special weather statement, Jul 23, 8:30 PM CDT, 2 hours 26 minutes before
NEZ015-019-020-240230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LINCOLN NE 830 PM CDT FRI JUL 23 1993 ...FLASH FLOOD WATCH FOR SOUTHEAST NEBRASKA TONIGHT... ...STRONG THUNDERSTORMS DEVELOPING ACROSS PAWNEE COUNTY... AT 820 PM RADAR INDICATED A AREA OF DEVELOPING THUNDERSTORMS ACROSS SOUTHEAST NEBRASKA. THE THUNDERSTORMS WERE IN AN AREA FROM EAST OF HUMBOLDT TO BAILYVILLE KANSAS. MOVEMENT WAS TO THE NORTHEAST AT 15 MPH. A FLASH FLOOD WATCH IS IN EFFECT FOR SOUTHEAST NEBRASKA TONIGHT. ANY ADDITIONAL HEAVY RAINS COULD AGGREVATE FLOODING PROBLEMS. IF FLOODING IS OBSERVED OR A WARNING IS ISSUED...MOVE TO HIGHER GROUND IMMEDIATELY. LISTEN FOR LATER STATEMENTS. ZELL
Special weather statement, Jul 23, 9:12 PM CDT, 1 hour 44 minutes before
NEZ010-020-IAZ080-090-091-240315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA NE 912 PM CDT FRI JUL 23 1993 ...THUNDERSTORMS DEVELOPING RAPIDLY OVER SOUTHEAST NEBRASKA... THUNDERSTORMS THAT DEVELOPED OVER EXTREME SOUTHEAST NEBRASKA CONTINUE TO HOLD TOGETHER AND WERE MOVING EAST AT AROUND 15 MPH. SINCE 830 PM OTHER STORMS DEVELOPED RAPIDLY TO THE SOUTHWEST OF NEBRASKA CITY AND A CELL DEVELOPED NEAR CLARINDA IOWA. AS THE STORM MOVED THROUGH PAWNEE CITY IT PRODUCED MODERATE RAIN AND AT DUBOIS IS DROPPED /.45/ OF IN INCH IN 15 MINUTES. SO FAR THESE STORMS HAVE PRODUCED NO SEVERE WEATHER. KLISH
Special weather statement, Jul 23, 9:14 PM CDT, 1 hour 42 minutes before
NEZ010-020-IAZ080-090-091-240315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA NE 912 PM CDT FRI JUL 23 1993 ...THUNDERSTORMS DEVELOPING RAPIDLY OVER SOUTHEAST NEBRASKA... THUNDERSTORMS THAT DEVELOPED OVER EXTREME SOUTHEAST NEBRASKA CONTINUE TO HOLD TOGETHER AND WERE MOVING EAST AT AROUND 15 MPH. SINCE 830 PM OTHER STORMS DEVELOPED RAPIDLY TO THE SOUTHWEST OF NEBRASKA CITY AND A CELL DEVELOPED NEAR CLARINDA IOWA. AS THE STORM MOVED THROUGH PAWNEE CITY IT PRODUCED MODERATE RAIN AND AT DUBOIS IS DROPPED /.45/ OF IN INCH IN 15 MINUTES. SO FAR THESE STORMS HAVE PRODUCED NO SEVERE WEATHER. KLISH
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 9:34 PM CDT | Severe Thunderstorm Warning | OAX | Richardson | 56 min |
| Jul 23, 10:12 PM CDT | Severe Thunderstorm Warning | OAX | Nemaha, Pawnee | 48 min |
| Jul 23, 10:33 PM CDT | Flash Flood Warning | OAX | Richardson | 6 hr |
| Jul 23, 11:36 PM CDT | Severe Thunderstorm Warning | OAX | Richardson | 39 min |
| Jul 24, 12:55 AM CDT | Severe Thunderstorm Warning | OAX | Nemaha | 35 min |
| Jul 24, 2:53 AM CDT | Flash Flood Warning | OAX | Cass | 6 hr |
| Jul 24, 4:20 AM CDT | Flash Flood Warning | OAX | Lancaster | 5 hr |
| Jul 24, 4:37 AM CDT | Flash Flood Warning | OAX | Seward | 4 hr |
| Jul 24, 6:57 PM CDT | Tornado Warning | OAX | Saline | 33 min |
Nearby
Flash Flood Warnings in Nebraska, 1993Every flash flood warning in 1993
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.