Alert archive / Nebraska / Flash Flood Warnings in 1997

Flash Flood Warning 9, NWS North Platte, NE

October 11, 1997Deuel County, Nebraska

NWS North Platte, NE issued this flash flood warning at Oct 11, 1997, 10:50 PM MDT for Deuel County, Nebraska. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Oct 11, 1997, 10:50 PM MDT (04:50 UTC)
Expired: Oct 12, 1997, 1:50 AM MDT
In force: 3 hr
Issued by: NWS North Platte, NE
Area: Whole counties

County Deuel County, NE

The radar

The North Platte radar (KLNX), 174 km from the middle of the area, began a volume at 04:52 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.8 hours before the alert went out and 145 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: 990 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 1102 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 247 m²/s²
0-3 km storm-relative helicity: 328 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 3.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KLBF 120452
FFWLBF
NEC049-120750-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1150 PM CDT (1050 PM MDT) SAT OCT 11 1997

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE NE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 150 AM MDT (250 AM CDT)
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN THE NEBRASKA PANHANDLE

   ...EASTERN DEUEL COUNTY
 
AT 1040 PM MDT NORTH PLATTE DOPPLER RADAR INDICATED RAIN FALL
TOTALS OF 4 INCHES OR MORE OVER NORTHEAST DEUEL COUNTY. RAPID RISES
IN LOCAL CREEKS CAN BE EXPECTED DUE TO THE HEAVY RUNOFF OF EXCESSIVE
RAIN.

DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!

RLB/JRS

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 11, 7:30 PM MDT	Severe Thunderstorm Warning	LBF	Deuel, Garden	60 min
Oct 11, 7:46 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Garden, Grant	64 min
Oct 11, 8:02 PM MDT	Severe Thunderstorm Warning	LBF	Deuel, Garden, Keith	63 min
Oct 11, 8:50 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Grant	60 min
Oct 11, 9:52 PM MDT	Severe Thunderstorm Warning	LBF	Arthur	48 min

Nearby

Flash Flood Warnings in Nebraska, 1997 Every flash flood warning in 1997

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.