tornadotony Posted August 18, 2011 Share Posted August 18, 2011 Incredible supercell in Holt County...incredibly intense meso right over Ewing... Link to comment Share on other sites More sharing options...
Thundersnow12 Posted August 18, 2011 Share Posted August 18, 2011 5" hail marker with the storm over OAX right now...wow. Link to comment Share on other sites More sharing options...
Thundersnow12 Posted August 18, 2011 Share Posted August 18, 2011 Incredible supercell in Holt County...incredibly intense meso right over Ewing... Link to comment Share on other sites More sharing options...
Thundersnow12 Posted August 18, 2011 Share Posted August 18, 2011 view of the intense hailer west of Sioux city awhile from both the OAX 88D and LNX (had 80dbz at 26kft) Link to comment Share on other sites More sharing options...
Jonbo Posted August 18, 2011 Share Posted August 18, 2011 Had a friend in Council Bluffs (western part of town) tell me there was some hail up to Baseball size in their yard. Along with up to 65mph winds reported and just..oh my. Link to comment Share on other sites More sharing options...
cyclone77 Posted August 18, 2011 Share Posted August 18, 2011 Wow those cells are absolute BEASTS. Link to comment Share on other sites More sharing options...
Thundersnow12 Posted August 18, 2011 Share Posted August 18, 2011 awesome view of the HCR's streaming into these things and the overshooting tops Link to comment Share on other sites More sharing options...
on_wx Posted August 18, 2011 Share Posted August 18, 2011 PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE NORTH PLATTE NE 553 PM CDT THU AUG 18 2011 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0513 PM TORNADO 3 SE EWING 42.23N 98.30W 08/18/2011 HOLT NE STORM CHASER LARGE TORNADO SPOTTED NEAR THE COUNTY LINE BECOMING RAIN WRAPPED. Link to comment Share on other sites More sharing options...
andyhb Posted August 18, 2011 Share Posted August 18, 2011 Two TOG's currently. SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 625 PM CDT THU AUG 18 2011 NEC003-190000- /O.CON.KOAX.TO.W.0080.000000T0000Z-110819T0000Z/ ANTELOPE NE- 625 PM CDT THU AUG 18 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN ANTELOPE COUNTY UNTIL 700 PM CDT... AT 618 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS AND SPOTTERS WERE TRACKING A CONFIRMED TORNADO. THIS TORNADO WAS LOCATED NEAR NELIGH...OR 37 MILES WEST OF NORFOLK...MOVING SOUTHEAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... NELIGH...ELGIN AND OAKDALE. RADAR HAS ALSO DETECTED A SECOND AREA OF ROTATION NEAR CLEARWATER. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. MESOSCALE DISCUSSION 2011 NWS STORM PREDICTION CENTER NORMAN OK 0618 PM CDT THU AUG 18 2011 AREAS AFFECTED...PARTS OF CENTRAL/ERN NEB...FAR WRN IA...AND FAR NWRN MO CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY VALID 182318Z - 182345Z THREAT FOR ADDITIONAL TORNADOES SHOULD INCREASE THIS EVENING ACROSS FAR WRN IA...ERN NEB INTO NRN NEB. A TORNADO WATCH WILL LIKELY BE ISSUED TO REPLACE PART OF WW 785...AND INCLUDE AREAS NWWD INTO NRN NEB. EARLY EVENING SURFACE ANALYSIS SHOWED A WARM FRONT EXTENDING FROM SWRN SD ESEWD THROUGH NRN NEB /JUST S OF ANW/ TO SERN HOLT COUNTY...WITH THIS BOUNDARY THEN EXTENDING SEWD INTO SERN NEB AND FAR ERN KS. HIGH THETAE AIR MASS EXISTS INVOF OF THIS WARM FRONT WITH SURFACE DEWPOINTS IN THE LOWER 70S EXTENDING FROM THE ERN HALF OF NEB INTO NORTH CENTRAL NEB. AREA WIND PROFILER DATA SHOWED A STRENGTHENING SLY LLJ ACROSS THE ERN HALF OF NEB WITH SUBSEQUENT INCREASE IN LOW LEVEL SHEAR /EFFECTIVE SRH 100-300 M2 PER S2/ WHICH WILL CONTINUE TO SUPPORT A THREAT FOR A FEW TORNADOES. THIS THREAT EXTENDS NWWD INTO NORTH CENTRAL NEB AS A STRONG TO SEVERE STORM TRACKS SEWD FROM BENNETT COUNTY SD /SRN EXTENT OF WW 786/ INTO NRN NEB. ..PETERS.. 08/18/2011 Link to comment Share on other sites More sharing options...
andyhb Posted August 18, 2011 Share Posted August 18, 2011 Dangerous environment feeding these things. The southern storm out of the pair of tor-warned storms looks like it is about to explode... Link to comment Share on other sites More sharing options...
Thundersnow12 Posted August 18, 2011 Share Posted August 18, 2011 new cell went up very fast south of Neligh and has become the dominant updraft with that storm as the northern supercell has weakened as expected with the southern one to its due south as it moved into rain cooled air with blocked inflow. about 95kts g2g at 9000kft Link to comment Share on other sites More sharing options...
andyhb Posted August 18, 2011 Share Posted August 18, 2011 Looks like two areas of rotation on that cell. Phillip Lueking has rotation on his cam. URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 787 NWS STORM PREDICTION CENTER NORMAN OK 640 PM CDT THU AUG 18 2011 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF EXTREME SOUTHWEST IOWA NORTHWEST MISSOURI NORTHERN AND EASTERN NEBRASKA EFFECTIVE THIS THURSDAY NIGHT FROM 640 PM UNTIL MIDNIGHT CDT. TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 100 STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH NORTHEAST OF AINSWORTH NEBRASKA TO 30 MILES WEST OF FALLS CITY NEBRASKA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7). REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. OTHER WATCH INFORMATION...CONTINUE...WW 785...WW 786... DISCUSSION...SEVER STORMS OVER NERN NEB ARE TRACKING SEWD ALONG OUTFLOW BOUNDARY FROM EARLIER SEVERE STORMS...WHERE PRONOUNCED VEERING WIND PROFILES /REF OAX VAD DISPLAY/ ARE RESULTING IN SUBSTANTIAL DEEP LAYER SHEAR AND EFFECTIVE SRH. THIS WILL ENHANCE THREAT FOR SUPERCELLS WITH POTENTIAL TO PRODUCE A FEW TORNADOES. OTHER STRONG SUPERCELLS WITH TORNADO POTENTIAL ARE OVER EXTREME SOUTHWEST IA AND WILL MOVE INTO NWRN MO SOON...WHILE ADDITIONAL STORMS ARE LIKELY TO SPREAD FROM SD INTO INCREASINGLY MOIST/UNSTABLE AIR MASS OVER NRN NEB OVER THE NEXT SEVERAL HOURS. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM MOTION VECTOR 31025. ...WEISS Link to comment Share on other sites More sharing options...
andyhb Posted August 18, 2011 Share Posted August 18, 2011 http://www.severestu...lueking&uid=574 Still on the ground... BULLETIN - EAS ACTIVATION REQUESTEDTORNADO WARNING NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 657 PM CDT THU AUG 18 2011 THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN ANTELOPE COUNTY IN NORTHEAST NEBRASKA... NORTHEASTERN BOONE COUNTY IN NORTHEAST NEBRASKA... NORTHWESTERN MADISON COUNTY IN NORTHEAST NEBRASKA... * UNTIL 745 PM CDT * AT 650 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A CONFIRMED TORNADO 6 MILES NORTHWEST OF ELGIN...OR 38 MILES WEST OF NORFOLK. DOPPLER RADAR SHOWED THIS TORNADO MOVING SOUTHEAST AT 15 MPH. * LOCATIONS IMPACTED INCLUDE... MAIN TORNADO THREAT IN RURAL AREAS BETWEEN CLEARWATER AND SOUTH OF CLEARWATER...ALSO BETWEEN ELGIN AND OAKDALE. LARGE HAIL THREAT MAINLY NORTH OF THE TORNADO THREAT AREA. THE WARNED AREA INCLUDES HIGHWAY 275 IN NEBRASKA BETWEEN MILE MARKERS 34 AND 61. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. Also, to the north... BULLETIN - EAS ACTIVATION REQUESTEDTORNADO WARNING NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 702 PM CDT THU AUG 18 2011 THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A * TORNADO WARNING FOR... NORTHERN KNOX COUNTY IN NORTHEAST NEBRASKA... * UNTIL 745 PM CDT * AT 655 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A POSSIBLE TORNADO 8 MILES NORTH OF NIOBRARA...OR 34 MILES WEST OF YANKTON. DOPPLER RADAR SHOWED THIS POSSIBLE TORNADO MOVING SOUTHEAST AT 35 MPH. * LOCATIONS IMPACTED INCLUDE... NIOBRARA...SANTEE...AND CROFTON. PRECAUTIONARY/PREPAREDNESS ACTIONS... TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. http://www.severestu...rielson&uid=140 http://www.severestu...ndentop&uid=622 Just tremendous rotation on the big cell to the south. Link to comment Share on other sites More sharing options...
Chicago Storm Posted August 19, 2011 Share Posted August 19, 2011 75 DBZ up to 30kft with the cell near Clarinda, IA. Link to comment Share on other sites More sharing options...
Chicago Storm Posted August 19, 2011 Share Posted August 19, 2011 Around 100kts at about 8000ft... Link to comment Share on other sites More sharing options...
Thundersnow12 Posted August 19, 2011 Share Posted August 19, 2011 Around 100kts at about 8000ft... And a BWER Link to comment Share on other sites More sharing options...
Thundersnow12 Posted August 19, 2011 Share Posted August 19, 2011 5" hail marker on with the storm that just entered MO Link to comment Share on other sites More sharing options...
andyhb Posted August 19, 2011 Share Posted August 19, 2011 Yeah the dbz on that thing is ridiculous. Link to comment Share on other sites More sharing options...
Thundersnow12 Posted August 19, 2011 Share Posted August 19, 2011 have a friend who lives in Cameron, MO which is south of Maysville Link to comment Share on other sites More sharing options...
andyhb Posted August 19, 2011 Share Posted August 19, 2011 Whatever is on Vandentop's cam looks ugly as s***. Looks like he might have had a rapidly rotating wall cloud. Link to comment Share on other sites More sharing options...
andyhb Posted August 19, 2011 Share Posted August 19, 2011 Nasty structure... Link to comment Share on other sites More sharing options...
Jonbo Posted August 19, 2011 Share Posted August 19, 2011 Local met in Omaha (Jim Flowers) posted 92mph gust at Eppley Airfield. Same area that had the severe hail earlier and basically shutdown because of the hail earlier. Link to comment Share on other sites More sharing options...
Indystorm Posted August 19, 2011 Share Posted August 19, 2011 BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 751 PM CDT THU AUG 18 2011 THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN ANDREW COUNTY IN NORTHWEST MISSOURI... NORTHWESTERN DAVIESS COUNTY IN NORTH CENTRAL MISSOURI... DEKALB COUNTY IN NORTHWEST MISSOURI... GENTRY COUNTY IN NORTHWEST MISSOURI... SOUTHWESTERN HARRISON COUNTY IN NORTH CENTRAL MISSOURI... SOUTHEASTERN NODAWAY COUNTY IN NORTHWEST MISSOURI... * UNTIL 815 PM CDT * AT 748 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 80 MPH...AND GOLF BALL SIZE HAIL. THIS STORM WAS LOCATED NEAR STANBERRY...AND MOVING SOUTHEAST AT 45 MPH. * LOCATIONS IMPACTED INCLUDE... ALBANY...MAYSVILLE...KING CITY...UNION STAR...PATTONSBURG... DARLINGTON...FORD CITY...MCFALL...FAIRPORT...AMITY...SANTA ROSA AND WEATHERBY. AT 741 PM...TRAINED WEATHER SPOTTERS REPORTED GOLF BALL SIZE HAIL AND 70 MPH WINDS 3 MILES EAST OF ARKOE. Link to comment Share on other sites More sharing options...
Thundersnow12 Posted August 19, 2011 Share Posted August 19, 2011 sup comp now up to 44 in eastern NE Link to comment Share on other sites More sharing options...
andyhb Posted August 19, 2011 Share Posted August 19, 2011 Starting to get into more towns as well... Link to comment Share on other sites More sharing options...
Thundersnow12 Posted August 19, 2011 Share Posted August 19, 2011 all these storms are traveling along and north of the theta-e gradient Link to comment Share on other sites More sharing options...
Indystorm Posted August 19, 2011 Share Posted August 19, 2011 Low level helicity now up to 300 m2/s2 in area of concern in eastern NE. Dews in 70's as well as se winds. Link to comment Share on other sites More sharing options...
Thundersnow12 Posted August 19, 2011 Share Posted August 19, 2011 new cell went up quickly on the main sup's FF and became a quick supercell as well and now has a low-level meso west of Columbus. Link to comment Share on other sites More sharing options...
Radtechwxman Posted August 19, 2011 Share Posted August 19, 2011 all these storms are traveling along and north of the theta-e gradient very sharp instability axis to. very compact area of incredible parameters. that supercell near columbus, nebraska is a beast! well defined hook. but it has epic structure Link to comment Share on other sites More sharing options...
Thundersnow12 Posted August 19, 2011 Share Posted August 19, 2011 Low level helicity now up to 300 m2/s2 in area of concern in eastern NE. Dews in 70's as well as se winds. And the LLJ will continue to strengthen.. Link to comment Share on other sites More sharing options...
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