Alert archive / Nebraska / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 229, NWS Hastings, NE

August 22, 2002Dawson County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at Aug 22, 2002, 5:52 PM CDT for Dawson County, Nebraska. It was in force for 53 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 22, 2002, 5:52 PM CDT (22:52 UTC)
Expired: Aug 22, 2002, 6:45 PM CDT
In force: 53 min
Issued by: NWS Hastings, NE
Area: Counties, with a storm outline in the text

County Dawson County, NE

The radar

The Grand Island radar (KUEX), 137 km from the middle of the area, began a volume at 22:52 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.

What was reported inside it

Time	Report	Where	Remark
Aug 22, 6:05 PM CDT	Hail 0.75	Eustis, NE
Aug 22, 6:15 PM CDT	Hail 0.75	Farnam, NE

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

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.

Issued	Product	Office	Lasted
Aug 22, 4:40 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 10.9 hours before the alert went out and 68 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: 833 J/kg
Mixed-layer CIN: -217 J/kg
Mixed-layer LCL: 1034 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -51 m²/s²
0-3 km storm-relative helicity: -30 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

The text

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

782 
WUUS53 KGID 222252
SVRGRI
NEC047-222345-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
551 PM CDT THU AUG 22 2002

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

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

* UNTIL 645 PM CDT

* AT 546 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 2 MILES SOUTH OF FARNAM...OR ABOUT 23 MILES
  WEST OF LEXINGTON...MOVING NORTHEAST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FARNUM AT 555 PM CDT  
  COZAD AT 640 PM CDT

PEOPLE IN 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 QUARTERS.

LAT...LON 4068 10030 4055 10013 4070 9990 4069 9942
          4102 9943 4104 10020

&

NNNN
FAY

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 Aug 22, 2:25 PM CDT, 3 hours 27 minutes earlier.

Area forecast discussion, Aug 22, 2:25 PM CDT, 3 hours 27 minutes before

SOUTH CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HASTINGS NE
225 PM CDT THU AUG 22 2002

...FORECAST CONCERN TO BE CHANCE OF RAIN TONIGHT AND AGAIN FRIDAY
NIGHT/SATURDAY...

NO NEED TO BE TOO VERBOSE WITH THIS DISCUSSION IN CASE SEVERE WX
POPS LATER THIS AFTERNOON.  18Z SURFACE ANALYSIS HAS FRONTAL
BOUNDARY IN NORTHERN KANSAS WITH INVERTED TROUGH EXTENDING NORTHEAST
ACROSS CWA AND TOWARDS OFK. A LINE OF SHOWERS EXTEND ALONG THIS
FEATURE BUT RAIN AMOUNTS MINIMAL AT THIS TIME. GOOD LOW LEVEL
MOISTURE POOLING WELL NORTH OF FRONT WITH 70+ DEW POINTS NORTH OF
I-80.  TEMPS NORTH OF FRONT IN LOWER 80S WITH MID 90S TO THE SOUTH.
FRONT HAS SLOWED PAST FEW HOURS WITH NO BIG PRESSURE RISES BEHIND
IT AS WAS SEEN ON 15Z OBS.  UPPER AIR AND SATELLITE DATA SHOWED
ANOTHER WAVE APPROACHING SW NEB/NW KS. WILL HAVE TO MONITOR
PROGRESS ON PROFILER NET. RWD PROFILER DID SHOW BOUNDARY DEPTH ABOUT
3 KM AGL A FEW HOURS AGO AND NOT THAT IMPRESSIVE OF A SHEAR
PROFILE. FBY PROFILER SHEAR A LITTLE MORE RESPECTABLE. 850 MB
ANALYSIS AND PROFILERS HAD BEST LL JET AND MOISTURE EAST AND
SOUTHEAST OF CWA ONCE AGAIN.

WITH BOUNDARY SITTING IN SOUTHERN PART OF CWA...ADEQUATE LOW LEVEL
MOISTURE AND APPROACHING WAVE...WILL NEED POPS ALL AREAS TONIGHT.
HEAVY RAIN THREAT LOOKS TO BE WELL SOUTHEAST OF CWA WHERE LOW LEVEL
JET...850 MOISTURE AND TROPICAL CONNECTION SET UP. OUR MAIN THREAT
WOULD BE HAIL AND WINDS ALTHOUGH FREEZING LEVEL QUITE HIGH.

FRIDAY SHOULD BE QUIET WITH HIGH PRESSURE BUILDING. NEXT QUESTION IS
FRI NIGHT/SATURDAY AS BOTH AVN AND ETA WANT TO BRING A SHORT WAVE
THROUGH RIDGE. BOTH HAVE OMEGA VALUES EXCEEDING 12 UBARS/SEC...
AND BOTH WANT TO BRING MCS ACROSS DURING DAY ON SATURDAY WHICH IS
NOT IDEAL DIURNALLY.  PLAN TO INTRODUCE 30 POPS FRI NIGHT INTO
SATURDAY AND SEE HOW MODELS HANDLE NEXT FEW RUNS. CANNOT JUSTIFY
GOING ANY HIGHER CONSIDERING PAST FEW MONTHS OF DRY WEATHER.

AFTER THAT REST OF WEEKEND SHOULD BE DRY WITH REX BLOCK SETTING UP
OVER GREAT LAKES AND MISSISSIPPI VALLEY. NEXT SYSTEM DUE TO SWING
ACROSS THE NORTH TUES BUT WILL LEAVE FORECAST DRY UNTIL CONSISTENCY
BETWEEN MODELS AND TIMING CAN BE PINNED DOWN.

.GID...NONE.

EWALD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 22, 1:38 AM CDT	Severe Thunderstorm Warning	GID	Phelps	52 min
Aug 22, 1:49 AM CDT	Severe Thunderstorm Warning	GID	Kearney	41 min
Aug 22, 6:25 PM CDT	Severe Thunderstorm Warning	GID	Gosper	65 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2002 Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.