Alert archive / Nebraska / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 231, NWS Hastings, NE

September 7, 2001Polk County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at Sep 7, 2001, 2:56 AM CDT for Polk County, Nebraska. It was in force for 34 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Sep 7, 2001, 2:56 AM CDT (07:56 UTC)
Expired: Sep 7, 2001, 3:30 AM CDT
In force: 34 min
Issued by: NWS Hastings, NE
Area: Whole counties

County Polk County, NE

The radar

The Omaha radar (KOAX), 102 km from the middle of the area, began a volume at 07:55 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
Sep 7, 3:10 AM CDT	Hail 1	Shelby, 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Sep 7, 1:30 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 7.9 hours before the alert went out and 101 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: 1486 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1117 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 213 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.

856 
WUUS53 KGID 070757
SVRGRI
NEC143-070830-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
256 AM CDT FRI SEP 7 2001

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN POLK COUNTY IN EAST CENTRAL NEBRASKA

* UNTIL 330 AM CDT

* AT 250 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER STROMSBURG...OR ABOUT 17 MILES NORTH OF
  YORK...MOVING EAST AT 25 MPH.

SOME LOCATIONS IN THE PATH OF THIS STORM INCLUDE...SHELBY.

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

$$

KD

LAT...LON 4133 9761 4106 9761 4105 9741 4136 9739

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 Sep 7, 2:00 AM CDT, 56 minutes earlier.

Area forecast discussion, Sep 7, 2:00 AM CDT, 56 minutes before

SOUTH CENTRAL NEBRASKA/NORTH CENTRAL KANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HASTINGS NE
200 AM CDT FRI SEP 7 2001

SHORT AFD DUE TO SVR WX PASSING THRU AND NEW WATCH ISSUED. COLD
FRONT CUTTING ACROSS THE STATE THIS MORNING SETTING OFF WIDE SPREAD
CONVECTION. LINE OF SEVERE STORMS WILL CONTINUE TO PROGRESS EAST
THRU THE MORNING. LOOKING ONLY AT ETA...SHOWERS AND THUNDERSTORMS
SHOULD LINGER THRU MOST OF THE DAY...SO GOING CATEGORICAL.

MUCH COOLER TEMPS IN STORE FOR THE AREA THRU SUNDAY. GUIDANCE HIGHS
TODAY A BIT UNREALISTIC SO WILL GO COOLER. GUIDANCE HIGHS AND LOWS
AFTERWARDS ARE IN THE BALL PARK FOR THE MOST PART.

MODELS IN AGREEMENT THAT CLOUDS STAY THICK THRU AT LEAST SUNDAY.

NO CHANGES TO THE EXTENDED.

.GID...NONE.

DEE

In the hours before

Local storm report, Sep 7, 12:12 AM CDT, 2 hours 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
1212 AM CDT FRI SEP 07 2001

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

1200 AM    ELWOOD                    NE    .75 INCH HAIL
09/07/01   GOSPER                          REPORTED BY LAW
                                           ENFORCEMENT OFFICIALS

GUYER

Local storm report, Sep 7, 12:47 AM CDT, 2 hours 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
1247 AM CDT FRI SEP 07 2001

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

1240 AM    9 W ORD                   NE    .75 INCH HAIL
09/07/01   VALLEY                          REPORTED BY LAW
                                           ENFORCEMENT OFFICIALS

GUYER

Special weather statement, Sep 7, 2:13 AM CDT, 43 minutes before

NEZ039-040-046-047-060-061-072>074-082-083-070745-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HASTINGS NE
213 AM CDT FRI SEP 7 2001

...SEVERE THUNDERSTORM WATCH NUMBER 711 IN EFFECT UNTIL 2 AM FOR
PORTIONS OF SOUTH CENTRAL NEBRASKA HAS EXPIRED...

SHOWERS AND THUNDERSTORMS WILL PERSIST ACROSS THE AREA THROUGH THE
REST OF THE MORNING HOURS...BUT SEVERE WEATHER IS NO LONGER
ANTICIPATED.

IF YOU HAVE DAMAGE TO REPORT DUE TO SEVERE WEATHER...PLEASE CONTACT
LOCAL LAW OFFICIALS...WHO WILL THEN RELAY THE INFORMATION TO THE
HASTINGS NATIONAL WEATHER SERVICE.

DEE

Local storm report, Sep 7, 2:44 AM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
244 AM CDT FRI SEP 07 2001

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

0220 AM    ALTON                     KS    WIND DAMAGE
09/07/01   OSBORNE                         TREE LIMBS BLOWN DOWN.
                                           REPORTED BY SHERIFFS
                                           OFFICE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 6, 11:27 PM CDT	Severe Thunderstorm Warning	GID	Gosper	48 min
Sep 7, 12:15 AM CDT	Severe Thunderstorm Warning	GID	Dawson, Gosper	45 min
Sep 7, 12:25 AM CDT	Severe Thunderstorm Warning	GID	Valley	50 min
Sep 7, 12:50 AM CDT	Severe Thunderstorm Warning	GID	Buffalo, Sherman	40 min
Sep 7, 1:03 AM CDT	Severe Thunderstorm Warning	GID	Greeley, Howard	57 min
Sep 7, 1:03 AM CDT	Severe Thunderstorm Warning	GID	Phelps	27 min

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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.