Alert archive / Nebraska / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 79, NWS Hastings, NE

May 5, 2001Dawson County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at May 5, 2001, 6:52 PM CDT for Dawson County, Nebraska. It was in force for 23 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 5, 2001, 6:52 PM CDT (23:52 UTC)
Expired: May 5, 2001, 7:15 PM CDT
In force: 23 min
Issued by: NWS Hastings, NE
Area: Whole counties

County Dawson County, NE

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.9 hours before the alert went out and 72 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 484 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 427 m²/s²
0-3 km storm-relative helicity: 504 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KGID 052353
SVRGRI
NEC047-060015-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
652 PM CDT SAT MAY 5 2001

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DAWSON COUNTY IN SOUTH CENTRAL NEBRASKA

* UNTIL 715 PM CDT

* AT 650 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 9 MILES EAST OF COZAD...OR ABOUT 8 MILES
  NORTHWEST OF LEXINGTON...MOVING NORTH AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  EDDYVILLE AT 705 PM CDT

PEOPLE IN DAWSON COUNTY SHOULD SEEK SHELTER IN A STURDY STRUCTURE AND
STAY AWAY FROM WINDOWS. THE PRIMARY SEVERE WEATHER THREAT IS HAIL 
THE SIZE OF DIMES AND QUARTERS.

$$

LAT...LON 4079 9997 4077 9974 4106 9948 4109 10008

09
NNNN

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Hastings, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at May 5, 2:57 PM CDT, 3 hours 55 minutes earlier.

Area forecast discussion, May 5, 2:57 PM CDT, 3 hours 55 minutes before

SOUTH CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HASTINGS NE
257 PM CDT SAT MAY 5 2001

...RAIN CHANCES MAIN CHALLENGE...AS WELL AS SVR/FLOODING POTENTIAL...

UPPER LOW CIRCULATION SHOWS UP WELL ON RADAR MOSAIC AND SATELLITE
JUST NORTHWEST OF GOODLAND.  ASSOCIATED DRY SLOT AS FAR NORTH AS
SOUTH DAKOTA BORDER.  18Z SURFACE ANALYSIS HAS LOW ALMOST UNDERNEATH
UPPER LOW...DOWN TO 998.8 MB...AND WARM FRONT ALSO APPROACHING SOUTH
DAKOTA BORDER.  SURFACE WINDS OVER CENTRAL NEBRASKA AND MOST OF
KANSAS MOSTLY SOUTH OR SOUTHWEST...BUT 2-3 MB PRESSURE FALLS ARE
BECOMING MORE COMMON THIS AFTERNOON...WHICH MAY HELP TO BACK THE
WINDS A BIT.

SURFACE WARM FRONT IS MUCH FARTHER NORTH THAN EARLIER PROGGED...
WHICH KEEPS CWFA DEEP INTO THE WARM SECTOR THIS AFTERNOON AND
EVENING.  LAPS 19Z ANALYSIS HAS CAPE VALUES UP TO 1000 J/KG IN NORTH
CENTRAL KANSAS...AND MODIFIED 18Z DDC SOUNDING SUGGESTS CAPE VALUES
UP TO 2300 POSSIBLE.  12Z H5 ANALYSIS SHOWED -21C AIR
UPSTREAM...WHICH SHOULD AT LEAST GET INTO WESTERN AREAS THIS
EVENING.  THIS INSTABILITY AND THE LIFT FROM THE UPPER LOW SHOULD BE
SUFFICIENT FOR STORM DEVELOPMENT...BUT POSSIBLY MORE SCATTERED THAN
SOLID.  ALSO STILL APPEARS THAT MORE ORGANIZED CLUSTER OF STORMS MAY
FORM TO OUR SOUTHWEST...WHICH WOULD PROVIDE ANOTHER CHANCE FOR
STORMS IN THE AREA BUT LATER IN THE EVENING/NIGHT.  CLOSELY WATCHING
VISIBLE IMAGERY FOR INITIATION TO OUR SOUTHWEST.

CURRENTLY HAVE A FLASH FLOOD WATCH POSTED FOR ERN COUNTIES...AND
GIVEN THE FLASH FLOOD GUIDANCE VALUES OF 0.5-1.0 INCHES AND A DECENT
CHANCE FOR THUNDERSTORMS...WILL NOT DROP THE WATCH BUT WILL NOT
EXPAND IT EITHER.

WITH THE WARM FRONT SO FAR NORTH AND MORE UNIDIRECTIONAL WIND
SHEAR...THE THREAT FOR WIDESPREAD SEVERE IS LESS THAN EARLIER
THOUGHTS...HOWEVER WILL CONTINUE TO MENTION SEVERE WORDING IN ZONES
WITH THREAT FOR HAIL.  AND IF SURFACE LOW CONTINUES TO DEEPEN...SOME
BACKING STILL POSSIBLE ESPECIALLY IN NEBRASKA COUNTIES AS MENTIONED
ABOVE.

BEYOND TONIGHT...WATER VAPOR LOOP SHOWS THE SHARPENING UPPER TROF
MOVING THROUGH THE PACIFIC NORTHWEST...AND MODELS ARE SIMILAR WITH
BRINGING THIS FEATURE INTO THE NORTHERN PLAINS SUNDAY NIGHT.  NGM IS
FARTHER NORTH...AND TEND TO BELIEVE THE ETA/AVN WHICH ARE IN MUCH
BETTER AGREEMENT WITH EACH OTHER.

SUNDAY THE BIG UPPER LOW TO OUR WEST WILL BEGIN TO FILL AND PHASE
WITH THE NRN STREAM LOW...HOWEVER LINGERING UPPER DIVERGENCE IN
COMBO WITH STEEP LAPSE RATES SHOULD CONTINUE TO KEEP SHOWERS IN THE
REGION.  WILL KEEP POPS FAIRLY HIGH SUNDAY...THEN TAPER SUNDAY
EVENING.  WILL ALSO MENTION WINDY ON BACK SIDE OF UPPER LOW.

LATEST MRF HAS MORE DEFINED UPPER RIDGE TAKING OVER FOR THE
WEEK...BUT KEEPS A WEAK SHORTWAVE MOVING THROUGH FOR THE END OF THE
WEEK.  THUS DRY MON-WED WITH A CHANCE THU-FRI...THEN DRY SAT.  WENT
WARMER FOR WEDNESDAY.

.GID...FLASH FLOOD WATCH TONIGHT FOR POLK...YORK...FILLMORE..
       THAYER...THAYER...NUCKOLLS...JEWELL.

NIETFELD

Nearby

Severe Thunderstorm Warnings in Nebraska, 2001 Every severe thunderstorm warning in 2001

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.