Alert archive / Nebraska / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 239, NWS Hastings, NE

July 21, 2003Dawson County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at Jul 21, 2003, 9:03 PM CDT for Dawson County, Nebraska. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 21, 2003, 9:03 PM CDT (02:03 UTC)
Expired
Jul 21, 2003, 9:30 PM CDT
In force
27 min
Issued by
NWS Hastings, NE
Area
Counties, with a storm outline in the text

County Dawson County, NE

The radar

The North Platte radar (KLNX), 139 km from the middle of the area, began a volume at 02:03 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 21, 4:50 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 2.1 hours before the alert went out and 289 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, Denver, CO at 00:00Z on 2003-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 108 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, Denver, CO at 00:00Z on 2003-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 square meters per square second.1939Sfc1 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
108 J/kg
Mixed-layer CIN
-119 J/kg
Mixed-layer LCL
3151 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
33 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 
WUUS53 KGID 220203
SVRGID
NEC047-220230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
902 PM CDT MON JUL 21 2003

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

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

* UNTIL 930 PM CDT

* AT 859 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES NORTH OF FARNAM...OR ABOUT 24 MILES
  WEST OF LEXINGTON...MOVING SOUTHEAST AT 30 MPH.

* SOME LOCATIONS IN THE PATH OF THIS SEVERE STORM INCLUDE...
  FARNAM...
  RURAL SOUTHWESTERN DAWSON COUNTY...

PEOPLE IN SOUTHWESTERN DAWSON COUNTY SHOULD SEEK SHELTER IN A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

THE PRIMARY SEVERE WEATHER THREAT IS LARGE HAIL THE SIZE OF PENNIES.

LAT...LON 4070 10022 4070 9977 4090 9976 4090 10021
$$
GUYER/T
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 Jul 21, 3:00 PM CDT, 6 hours 3 minutes earlier.

Area forecast discussion, Jul 21, 3:00 PM CDT, 6 hours 3 minutes before
SOUTH CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HASTINGS NE
300 PM CDT MON JUL 21 2003

NO SIG CHANGES TO CURRENT...ONLY MINOR ADJUSTMENTS TO TEMPS AND
PRECIP THROUGH FIRST 36 HRS.

SFC LOW PRESS CENTER NEAR NWRN KS/NERN CO WITH FRONTAL BOUNDARY
STRETCHING N AND SE OF THIS POINT FROM WRN DAKOTAS THROUGH WRN
NE...THEN S THROUGH CENTRAL KS AND THROUGH THE SWRN CORNER OF MS.
SPACE PICS SHOW STRONG UPR WAVE PUSHING INTO WRN NE FROM CNTRL
ROCKIES AREA OF WY. ADDITIONAL LL MOISTURE CONVERGENT BOUNDARY
RUNNING FROM OGALLALA NE TO SE BETWEEN MCCOOK AND HOLDREGE. LL DRY
PUNCH FLOWING IN FROM NNW JUST E OF AN AINSWORTH TO SYDNEY NE LINE.
THUS...SWRN NE AND NWRN KS LOOKS TO BE BEST AREA TO GET THUNDER
GOING AT THIS TIME. LL SHEAR ALSO BEST IN THIS REGION...WITH BETTER
UPR SHEAR MOVING OVR THIS AREA THROUGH EVENING...SO SEVERE CHANCES
WILL REMAIN HIGH...AND SOMEWHAT ALONG AXIS OF HIGH THETA E/CAPE
AIR...NEAR W OR SWRN PORTION CWA. LOOKS LIKE FAIRLY HIGH SUPER CELL
CHCS NEAR THE AREA...AND WITH COLDER UPR TEMPS HAIL/WIND CERTAINTY
WITH STORMS...WITH DECENT CHC FOR TORNADOES ESPECIALLY EARLY IN
EVENT. STORMS LATER IN EVENING LOOK TO LINE OUT AND MAY TURN INTO
WIND EVENT OVER N/NWRN KS...WITH SOME HAIL CHCS CONTINUING OVR N
CNTRL KS THROUGH EARLY MORNING HRS.

THEN INTO BEYOND...YADA YADA YADA...CONTINUED CHC PRECIP THROUGH
MONDAY AS STRONG NRN PAC LOW MASHES WRN CONUS RIDGE AND FLOW GOES
FROM FAST WRLY OVR WEEKEND TO COOL NWRLY EARLY NEXT WEEK.
YIKES...COULD
BE WET.

.GID...NONE.

10
Hazardous weather outlook, Jul 21, 11:53 AM CDT, 9 hours 10 minutes before
KSZ005>007-017>019-NEZ039>041-046>049-060>064-072>077-082>087-221200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HASTINGS NE
ISSUED BY NWS OMAHA/VALLEY NE
1150 AM CDT TUE JUL 22 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL NEBRASKA AND
PARTS OF NORTH CENTRAL KANSAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THUNDERSTORMS WILL ONCE AGAIN BE POSSIBLE OVER SOUTH CENTRAL
NEBRASKA AND PARTS OF NORTH CENTRAL KANSAS THIS AFTERNOON AND
TONIGHT AS AN UPPER LEVEL DISTURBANCE MOVES THROUGH THE REGION. THE
BEST CHANCE FOR SEVERE WEATHER IS ALONG AND SOUTHWEST OF LINE FROM
KEARNEY TO SUPERIOR WHERE INSTABILITY WILL BE THE GREATEST LATE THIS
AFTERNOON AND EVENING. WIND SHEAR IS SUFFICIENT TO SUPPORT SUPERCELL
THUNDERSTORMS WITH THE MAIN HAZARDS BEING LARGE HAIL AND DAMAGING
WINDS. THUNDERSTORMS WILL MOVE INTO CENTRAL KANSAS LATE TONIGHT WITH
THE CHANCE OF SEVERE WEATHER DIMINISHING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THERE WILL BE ANOTHER CHANCE OF THUNDERSTORMS CHANCES ACROSS THE
AREA LATE THURSDAY THROUGH SUNDAY. HOWEVER AT THIS TIME THE COVERAGE
AND INTENSITY OF THESE STORMS ARE UNCERTAIN.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND TONIGHT ACROSS
SOUTH CENTRAL NEBRASKA AND NORTH CENTRAL KANSAS.

DEWALD

In the hours before

Local storm report, Jul 21, 5:22 PM CDT, 3 hours 41 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
522 PM CDT MON JUL 21 2003

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1010 PM    BLUE HILL                 NE   WIND DAMAGE
07/20/03   WEBSTER                        NUMEROUS TREES AND
                                          LIMBS BLOWN DOWN ACROSS
                                          TOWN. REPORTED BY
                                          OFF-DUTY NWS EMPLOYEE.

Nearby

Severe Thunderstorm Warnings in Nebraska, 2003Every severe thunderstorm warning in 2003

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.