Alert archive / Nebraska / Flash Flood Warnings in 2002

Flash Flood Warning 2, NWS Omaha, NE

May 28, 2002Johnson County, Pawnee County, Nebraska

NWS Omaha, NE issued this flash flood warning at May 28, 2002, 3:14 AM CDT for Johnson County, Pawnee County, Nebraska. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 28, 2002, 3:14 AM CDT (08:14 UTC)
Expired: May 28, 2002, 7:15 AM CDT
In force: 4 hr
Issued by: NWS Omaha, NE
Area: Counties, with a storm outline in the text

Counties Johnson County, NE, Pawnee County, NE

The radar

The Omaha radar (KOAX), 111 km from the middle of the area, began a volume at 08:14 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.

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 8.2 hours before the alert went out and 111 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: 555 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 1882 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KOAX 280814
FFWOMA
NEC097-133-281215-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE OMAHA NE
314 AM CDT TUE MAY 28 2002

THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  JOHNSON COUNTY IN SOUTHEAST NEBRASKA
  PAWNEE COUNTY IN SOUTHEAST NEBRASKA

* UNTIL 715 AM CDT

* AT 310 AM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY       
  HEAVY RAIN OF 2 TO 4 INCHES HAD FALLEN IN WESTERN PAWNEE AND
  JOHNSON COUNTIES.  ADDITIONAL THUNDERSTORMS ARE MOVING TOWARD
  THE AREA FROM THE SOUTHWEST...AND MORE HEAVY RAIN IS POSSIBLE.  

* SOME LOCATIONS AFFECTED...
  CRAB ORCHARD
  BURCHARD

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROAD.
THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR OR TRUCK TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.

LAT...LON 4053 9608 4002 9601 4001 9646 4053 9647

POLLACK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 11:45 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Seward	45 min
May 27, 11:48 PM CDT	Severe Thunderstorm Warning	OAX	Pawnee	42 min
May 27, 11:58 PM CDT	Severe Thunderstorm Warning	OAX	Gage	32 min
May 28, 12:07 AM CDT	Severe Thunderstorm Warning	OAX	Antelope	38 min
May 28, 12:29 AM CDT	Severe Thunderstorm Warning	OAX	Gage	31 min
May 28, 12:29 AM CDT	Severe Thunderstorm Warning	OAX	Butler	46 min
May 28, 12:38 AM CDT	Severe Thunderstorm Warning	OAX	Johnson	37 min
May 28, 12:53 AM CDT	Severe Thunderstorm Warning	OAX	Saline	37 min
May 28, 12:59 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson	46 min
May 28, 1:12 AM CDT	Severe Thunderstorm Warning	OAX	Jefferson	33 min
May 28, 1:46 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	44 min
May 28, 1:48 AM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Saline	27 min
May 28, 2:12 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Lancaster, Otoe	48 min
May 28, 2:25 AM CDT	Severe Thunderstorm Warning	OAX	Douglas, Washington	35 min
May 28, 2:30 AM CDT	Severe Thunderstorm Warning	OAX	Sarpy	30 min
May 28, 2:34 AM CDT	Flash Flood Warning	OAX	Gage, Jefferson	4 hr
May 28, 3:07 AM CDT	Severe Thunderstorm Warning	OAX	Sarpy	23 min

Nearby

Flash Flood Warnings in Nebraska, 2002 Every flash flood warning in 2002

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; radar from the NEXRAD Level II archive.