Alert archive / Nebraska / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 107, NWS Hastings, NE

June 7, 2002Valley County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at Jun 7, 2002, 6:15 PM CDT for Valley County, Nebraska. It was in force for 60 min. 3 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: Jun 7, 2002, 6:15 PM CDT (23:15 UTC)
Expired: Jun 7, 2002, 7:15 PM CDT
In force: 60 min
Issued by: NWS Hastings, NE
Area: Counties, with a storm outline in the text

County Valley County, NE

The radar

The North Platte radar (KLNX), 136 km from the middle of the area, began a volume at 23:15 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
Jun 7, 6:20 PM CDT	Hail 0.75	Ord, NE
Jun 7, 6:59 PM CDT	Hail 0.88	Ord, NE
Jun 7, 7:20 PM CDT	Hail 1	Ord, 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
Jun 7, 5:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.3 hours before the alert went out and 144 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: 463 J/kg
Mixed-layer CIN: -514 J/kg
Mixed-layer LCL: 1754 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 195 m²/s²
0-3 km storm-relative helicity: 193 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 072322
SVRGRI
NEC175-080015-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTION FOR RETRANSMIT
NATIONAL WEATHER SERVICE HASTINGS NE
615 PM CDT FRI JUN 7 2002

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  VALLEY COUNTY IN CENTRAL NEBRASKA

* UNTIL 715 PM CDT

* AT 612 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 7 MILES EAST OF ELYRIA TO 7 MILES
  NORTHWEST OF ARCADIA...OR FROM 45 MILES NORTHEAST OF BROKEN BOW TO
  21 MILES EAST OF BROKEN BOW...MOVING EAST AT 20 MPH.

SOME LOCATIONS IN THE PATH OF THIS LINE OF SEVERE STORMS INCLUDE
ELYRIA...ORD...ARCADIA AND NORTH LOUP.

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

DAMAGING THUNDERSTORM WINDS IN EXCESS OF 60 MPH AND LARGE HAIL THE
SIZE OF GOLFBALLS ARE LIKELY.

LAT...LON 4174 9891 4171 9920 4141 9945 4141 9877
          4172 9875

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 Jun 7, 1:40 PM CDT, 4 hours 35 minutes earlier.

Area forecast discussion, Jun 7, 1:40 PM CDT, 4 hours 35 minutes before

SOUTH CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HASTINGS NE
140 PM CDT FRI JUN 7 2002

MAIN FOCUS THIS PACKAGE IS CONVECTION TONIGHT.

18Z SURFACE ANALYSIS PLACED FRONT ON A BKX-ANW-FCL. BOUNDARY HAS SAT
NEARLY STATIONARY SINCE LIFTING NORTH AFTER LAST EVENINGS
CONVECTION. SATELLITE HAS UPPER IMPULSE ALONG NE-SD BORDER W OF VTN
WITH CONVECTION JUST N OF FRONT.

MODELS IN GOOD AGREEMENT WITH FRONT DRIFTING SOUTH THIS EVENING IN
RESPONSE TO VTN IMPULSE AND ANOTHER WEAK IMPULSE TONIGHT LATER
TONIGHT. WITH WARMING TEMPERATURES ALOFT AND CONVECTIVE TEMPS NEAR
100 SOUTH OF BOUNDARY...CONVECTION SHOULD FORM ONLY IN AND N OR
FRONT THIS EVENING. WSW UPPER FLOW WILL TAKE MOST CONVECTION ALONG
FRONT BUT SOME MAY BE STRONG ENOUGH TO TURN INTO LOW LEVEL MOISTURE
FIELD. POPS IN 40 PCT RANGE APPEAR APPROPRIATE ABOUT 100 MILES S OF
FRONT.

FRONT FORECAST TO SHIFT FURTHER N AS UPPER TROF NOW OVER
PACIFIC NW MOVES INTO GREAT BASIN TOMORROW. HOT...HUMID AND WINDY
WX FORECAST THRU THE WEEKEND WITH EXTREMELY WARM H7 TEMPERATURES
CAPPING ANY SHOT AT CONVECTION.

WILL HAVE TO WAIT FOR ENERGY ASSOCIATED WITH UPPER TROF MAINLY MON
AFTN-MON NGT BEFORE THERE IS ANY CHANCE FOR TSTMS. EVEN THEN...
EXTENDED MODELS TAKE ENERGY INTO DAKOTAS LEAVING GID CWA WITH ONLY
A CHANCE FOR PCPN.

NW UPPER FLOW KEEPS DRY AND MILD WX THRU THE REST OF NEXT WEEK.

.GID...NONE.

SCHURR

In the hours before

Special weather statement, Jun 7, 3:48 PM CDT, 2 hours 27 minutes before

KSZ005>007-017>019-NEZ039>041-046>049-060>064-072>077-082>087-072300-

HAZARDOUS WEATHER OUTLOOK...CORRECTION
NATIONAL WEATHER SERVICE HASTINGS NE
348 PM CDT FRI JUN 7 2002

...SPOTTER ACTIVATION IS POSSIBLE THIS EVENING ACROSS PARTS OF
CENTRAL AND SOUTH CENTRAL NEBRASKA BUT SHOULD NOT BE NEEDED IN NORTH
CENTRAL KANSAS...

SCATTERED THUNDERSTORMS MAY DEVELOP ACROSS NORTHERN NEBRASKA THIS
AFTERNOON AND THEN DRIFT INTO CENTRAL AND SOUTH-CENTRAL NEBRASKA THIS
EVENING. THE STORMS WILL DEVELOP ALONG A COLD FRONT LATER THIS
AFTERNOON AND EVENING...FROM NEAR SIOUX CITY TO
IMPERIAL. STORMS WOULD BE EXPECTED IN CENTRAL NEBRASKA AFTER 6 PM.
SOME OF THESE STORMS MAY PRODUCE HAIL AND STRONG WINDS.

THE MAIN AREA WHERE SEVERE WEATHER MIGHT OCCUR IS ALONG AND NORTH
OF A LINE FROM YORK TO HASTINGS TO HOLDREGE.  MOST SEVERE WEATHER
SHOULD BE OVER WITH BY MIDNIGHT.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 7:13 PM CDT	Severe Thunderstorm Warning	GID	Buffalo	47 min
Jun 6, 9:01 PM CDT	Severe Thunderstorm Warning	GID	Adams, Kearney	44 min
Jun 7, 5:12 PM CDT	Severe Thunderstorm Warning	GID	Valley	63 min
Jun 7, 6:22 PM CDT	Severe Thunderstorm Warning	GID	Valley	53 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.