Alert archive / Nebraska / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 297, NWS Hastings, NE
NWS Hastings, NE issued this severe thunderstorm warning at Aug 12, 2011, 4:21 AM CDT for Greeley County, Nebraska. It was in force for 39 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
- Aug 12, 2011, 4:21 AM CDT (09:21 UTC)
- Expired
- Aug 12, 2011, 5:00 AM CDT
- In force
- 39 min
- Issued by
- NWS Hastings, NE
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Greeley County, NE
The radar
The Grand Island radar (KUEX), 139 km from the middle of the area, began a volume at 09:21 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.
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 9.4 hours before the alert went out and 180 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.
- Mixed-layer CAPE
- 2513 J/kg
- Mixed-layer CIN
- -69 J/kg
- Mixed-layer LCL
- 1288 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 97 m²/s²
- 0-3 km storm-relative helicity
- 281 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 19.6
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 12, 3:53 AM CDT, 28 minutes earlier.
Area forecast discussion, Aug 12, 3:53 AM CDT, 28 minutes before
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HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE HASTINGS NE 928 PM CDT THU AUG 11 2011 KSZ005>007-017>019-NEZ039>041-046>049-060>064-072>077-082>087- 121200- PHILLIPS-SMITH-JEWELL-ROOKS-OSBORNE-MITCHELL-VALLEY-GREELEY-NANCE- SHERMAN-HOWARD-MERRICK-POLK-DAWSON-BUFFALO-HALL-HAMILTON-YORK- GOSPER-PHELPS-KEARNEY-ADAMS-CLAY-FILLMORE-FURNAS-HARLAN-FRANKLIN- WEBSTER-NUCKOLLS-THAYER- 928 PM CDT THU AUG 11 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL NEBRASKA AND PORTIONS OF NORTH CENTRAL KANSAS. .DAY ONE...TONIGHT. SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS THE OUTLOOK AREA OVERNIGHT. HAIL TO THE SIZE OF QUARTERS... DAMAGING WIND GUSTS NEAR 60 MPH...AND LOCALLY HEAVY RAINFALL... WILL ALL BE POSSIBLE WITH ANY STRONG TO SEVERE STORMS THAT DO DEVELOP. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. STRONG TO SEVERE THUNDERSTORMS WILL REMAIN POSSIBLE ACROSS THE FORECAST AREA FRIDAY MORNING THROUGH EARLY FRIDAY AFTERNOON. HAIL TO THE SIZE OF QUARTERS...DAMAGING WIND GUSTS NEAR 60 MPH...AND LOCALLY HEAVY RAINFALL...WILL BE POSSIBLE WITH THESE STORMS. THUNDERSTORM CHANCES RETURN TO THE OUTLOOK AREA SUNDAY NIGHT THROUGH MONDAY NIGHT. IT IS TOO EARLY TO DETERMINE WHETHER THESE THUNDERSTORMS WILL POSE A RISK FOR SEVERE WEATHER OR LOCALLY HEAVY RAINFALL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TONIGHT. && MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING WEB PAGE: HTTP://WWW.WEATHER.GOV/HASTINGS (ALL LOWERCASE)
In the hours before
Special weather statement, Aug 11, 11:43 PM CDT, 4 hours 38 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HASTINGS NE
1143 PM CDT THU AUG 11 2011
NEZ049-120515-
POLK NE-
1143 PM CDT THU AUG 11 2011
...SIGNIFICANT WEATHER ADVISORY FOR POLK COUNTY UNTIL 1215 AM CDT...
AT 1139 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM CLARKS TO GRESHAM...
AND MOVING SOUTHEAST AT 45 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THESE STORMS.
LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
POLK...
THESE STORMS MAY INTENSIFY...AND A SEVERE THUNDERSTORM WATCH IS IN
EFFECT FOR THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV
STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.
LAT...LON 4104 9738 4105 9783 4117 9783 4131 9762
4131 9760 4134 9759 4137 9751 4137 9739
TIME...MOT...LOC 0443Z 330DEG 39KT 4117 9778 4105 9735
FAYSpecial weather statement, Aug 12, 12:12 AM CDT, 4 hours 9 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HASTINGS NE
1212 AM CDT FRI AUG 12 2011
NEZ041-048-049-063-120545-
HAMILTON NE-MERRICK NE-NANCE NE-POLK NE-
1212 AM CDT FRI AUG 12 2011
...SIGNIFICANT WEATHER ADVISORY FOR POLK...SOUTHEASTERN NANCE...
EASTERN MERRICK AND NORTHEASTERN HAMILTON COUNTIES UNTIL 1245 AM
CDT...
AT 1211 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM CLARKS TO CENTRAL
CITY...AND MOVING SOUTHEAST AT 40 MPH.
WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS.
LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
HORDVILLE...
POLK...
OSCEOLA...
STROMSBURG...
SHELBY...
THESE STORMS MAY INTENSIFY...AND A SEVERE THUNDERSTORM WATCH IS IN
EFFECT FOR THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV
STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.
LAT...LON 4105 9756 4106 9814 4131 9814 4136 9759
4134 9759 4136 9753 4137 9739 4105 9739
TIME...MOT...LOC 0513Z 320DEG 38KT 4118 9789 4106 9799
FAYLocal storm report, Aug 12, 12:19 AM CDT, 4 hours 2 minutes before
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</html>Special weather statement, Aug 12, 12:54 AM CDT, 3 hours 27 minutes before
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</html>The office that day
Everything else NWS Hastings, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 10:42 PM CDT | Special Weather Statement | GID | Nance | 33 min |
| Aug 11, 10:49 PM CDT | Special Weather Statement | GID | Greeley | 26 min |
| Aug 11, 11:08 PM CDT | Severe Thunderstorm Warning | GID | Greeley, Valley | 52 min |
| Aug 11, 11:26 PM CDT | Special Weather Statement | GID | Nance | 34 min |
| Aug 11, 11:37 PM CDT | Severe Thunderstorm Warning | GID | Howard, Merrick, Nance | 38 min |
| Aug 11, 11:43 PM CDT | Special Weather Statement | GID | Polk | 32 min |
| Aug 11, 11:59 PM CDT | Severe Thunderstorm Warning | GID | Valley | 46 min |
| Aug 12, 12:12 AM CDT | Special Weather Statement | GID | Merrick, Polk | 33 min |
| Aug 12, 12:27 AM CDT | Special Weather Statement | GID | Hamilton, York | 33 min |
| Aug 12, 12:54 AM CDT | Special Weather Statement | GID | Clay, Fillmore, Hamilton, York | 36 min |
| Aug 12, 4:12 AM CDT | Special Weather Statement | GID | Greeley | 33 min |
| Aug 12, 5:51 AM CDT | Special Weather Statement | GID | Nance | 39 min |
| Aug 12, 6:03 AM CDT | Special Weather Statement | GID | Polk | 42 min |
| Aug 12, 6:37 AM CDT | Special Weather Statement | GID | Fillmore, York | 38 min |
| Aug 12, 6:50 AM CDT | Special Weather Statement | GID | Clay, Fillmore, Hamilton | 40 min |
| Aug 12, 7:13 AM CDT | Special Weather Statement | GID | Fillmore, Thayer | 47 min |
Nearby
Severe Thunderstorm Warnings in Nebraska, 2011Every severe thunderstorm warning in 2011
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.