Alert archive / Nebraska / Flash Flood Warnings in 1993

Flash Flood Warning 11, NWS North Platte, NE

July 13, 1993Boyd County, Knox County, Nebraska

NWS North Platte, NE issued this flash flood warning at Jul 13, 1993, 7:42 AM CDT for Boyd County, Knox County, Nebraska. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jul 13, 1993, 7:42 AM CDT (12:42 UTC)
Expired
Jul 13, 1993, 10:45 AM CDT
In force
3 hr
Issued by
NWS North Platte, NE
Area
Whole counties

Counties Boyd County, NE, Knox County, NE

The nearest sounding before it

Aberdeen, SD (KHON), launched 12:00Z, 0.7 hours before the alert went out and 237 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-pSkew-T log-p diagram, Aberdeen, SD at 12:00Z on 1993-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 14 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 12:00Z on 1993-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 142 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
14 J/kg
Mixed-layer CIN
-198 J/kg
Mixed-layer LCL
644 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
142 m²/s²
0-3 km storm-relative helicity
166 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 
TTAA00 KOFK 131243
FFWOFK
NEC015-107-131545-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORFOLK NE
742 AM CDT TUE JUL 13 1993

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 1045 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES

   IN THE NORTH CENTRAL PART OF NEBRASKA
      BOYD...

   IN THE NORTHEAST PART OF NEBRASKA
      WESTERN KNOX...

AT 735 AM HOLT COUNTY SHERIFF REPORTED THAT PONCA CREEK WAS
FLOODING FROM NORTHWEST OF SPENCER WITH WATER RUNNING OVER THE
HIGHWAY 281 BRIDGE.
A FLASH FLOOD WARNING MEANS FLOODING IS OCCURRING OR IS IMMINENT.
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT ATTEMPT TO
CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY.
NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT.
TO ESCAPE RISING WATER MOVE TO HIGHER GROUND.

 VAN ALLEN 1240Z

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 13, 4:45 AM CDT, 2 hours 57 minutes before
NEZ006-131145-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
445 AM CDT TUE JUL 13 1993

...DENSE FOG WAS OCCURRING ACROSS PARTS OF SOUTHWEST AND WEST CENTRAL
   NEBRASKA...

AT 440 AM CDT THE VISIBILITY AT THE NORTH PLATTE REGIONAL AIRPORT WAS
REDUCED TO ONE HALF MILE IN FOG.  TRAVELERS ACROSS THE REGION ARE
ADVISED TO USE EXTREME CAUTION THIS MORNING.

WITH THE GROUND SURFACE STILL WET FROM PREVIOUS RAINS ALONG WITH LIGHT
WINDS...THE FOG IS NOT EXPECTED TO LIFT UNTIL AFTER SUNRISE THIS MORNING.

RN
Special weather statement, Jul 13, 6:15 AM CDT, 1 hour 27 minutes before
NEZ006-131345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
615 AM CDT TUE JUL 13 1993

...DENSE FOG WAS OCCURRING ACROSS PARTS OF SOUTHWEST AND WEST CENTRAL
   NEBRASKA...

AT 615 AM CDT THE VISIBILITY AT THE NORTH PLATTE REGIONAL AIRPORT WAS
REDUCED TO LESS THAN ONE HALF MILE IN FOG.  TRAVELERS ACROSS THE REGION
ARE ADVISED TO USE EXTREME CAUTION THIS MORNING.

WITH THE GROUND SURFACE STILL WET FROM PREVIOUS RAINS ALONG WvITH LIGHT
AND VARIABLE WINDS AND COOL TEMPERATURES IN THE LOWER 60S...THE FOG
IS NOT EXPECTED TO LIFT UNTIL AFTER SUNRISE THIS MORNING.

RN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 7:36 PM CDTTornado WarningLBFCherry39 min
Jul 12, 8:34 PM CDTSevere Thunderstorm WarningLBFCherry56 min
Jul 12, 9:31 PM CDTSevere Thunderstorm WarningLBFCherry57 min
Jul 13, 2:13 AM CDTSevere Thunderstorm WarningLBFMadison62 min
Jul 13, 2:13 AM CDTSevere Thunderstorm WarningLBFBoone32 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.