Alert archive / Nebraska / Flash Flood Warnings in 1999

Flash Flood Warning 4, NWS Hastings, NE

May 20, 1999Nuckolls County, Nebraska

NWS Hastings, NE issued this flash flood warning at May 20, 1999, 4:04 PM CDT for Nuckolls County, Nebraska. It was in force for 86 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 20, 1999, 4:04 PM CDT (21:04 UTC)
Expired
May 20, 1999, 5:30 PM CDT
In force
86 min
Issued by
NWS Hastings, NE
Area
Whole counties

County Nuckolls County, NE

The radar

The Grand Island radar (KUEX), 37 km from the middle of the area, began a volume at 21:07 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

Topeka, KS (KTOP), launched 12:00Z, 9.1 hours before the alert went out and 244 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, Topeka, KS at 12:00Z on 1999-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Topeka, KS at 12:00Z on 1999-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1336 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
May 20, 1:46 PM CDTSevere Thunderstorm WarningGIDFranklin, Harlan44 min
May 20, 2:26 PM CDTSevere Thunderstorm WarningGIDFranklin, Webster49 min
May 20, 3:12 PM CDTSevere Thunderstorm WarningGIDWebster48 min
May 20, 3:15 PM CDTFlash Flood WarningGIDWebster2 hr
May 20, 3:34 PM CDTSevere Thunderstorm WarningGIDNuckolls41 min
May 20, 4:02 PM CDTSevere Thunderstorm WarningGIDNuckolls48 min
May 20, 4:17 PM CDTSevere Thunderstorm WarningGIDClay, Fillmore, Thayer58 min
May 20, 2:36 PM CDTSevere Thunderstorm WarningGIDSmith24 min
May 20, 2:44 PM CDTSevere Thunderstorm WarningGIDOsborne61 min
May 20, 3:41 PM CDTSevere Thunderstorm WarningGIDOsborne49 min
May 20, 3:51 PM CDTSevere Thunderstorm WarningGIDMitchell39 min
May 20, 4:28 PM CDTSevere Thunderstorm WarningGIDJewell, Mitchell47 min

Nearby

Flash Flood Warnings in Nebraska, 1999Every flash flood warning in 1999

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.