cyclone77 Posted April 9, 2011 Share Posted April 9, 2011 We're just west of Fremont, NE...towering cumulus to our west. Yeah we can even see them here on the Iowa side. Do they look surface based? We can't tell from here. Link to comment Share on other sites More sharing options...
Indystorm Posted April 9, 2011 Share Posted April 9, 2011 Yeah we can even see them here on the Iowa side. Do they look surface based? We can't tell from here. They probably are. Elevated stuff trying to get going around Vermilion and Sioux Falls. 88/63 at Columbus Link to comment Share on other sites More sharing options...
k*** Posted April 9, 2011 Share Posted April 9, 2011 meanwhile, the dry line out here looks no better now than it did an hour ago...curse you, badgerblizzard! Link to comment Share on other sites More sharing options...
janetjanet998 Posted April 9, 2011 Share Posted April 9, 2011 MESOSCALE DISCUSSION 0388 NWS STORM PREDICTION CENTER NORMAN OK 0505 PM CDT SAT APR 09 2011 AREAS AFFECTED...ERN NEB...WRN IA CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY VALID 092205Z - 092300Z CORRECTED FOR GEOGRAPHIC REFERENCE WARM FRONT IS GRADUALLY LIFTING NWD ACROSS ERN NEB AND NWRN IA...CURRENTLY STRETCHING FROM NEAR OLU TO NEAR MCW. STRONG HEATING ACROSS SCNTRL/SERN NEB HAS ALLOWED A SUBSTANTIAL CU FIELD TO EVOLVE WITHIN THE BOUNDARY LAYER...CLUSTERING NEAR THE WARM FRONT WHERE SEVERAL DEEPER UPDRAFTS MAY SOON FORM THUNDERSTORMS. THERMODYNAMIC ENVIRONMENT IS QUITE FAVORABLE FOR SUPERCELLS WITH MLCAPE IN EXCESS OF 3000 J/KG. INHIBITION WILL CONTINUE TO WEAKEN OVER THE NEXT ONE-TWO HOURS AND THUS SUPERCELLS SHOULD DEVELOP NEAR/ALONG THE WARM FRONT WHERE SHEAR WILL UNDOUBTEDLY ENHANCE THE POTENTIAL FOR TORNADOES AND VERY LARGE HAIL. Link to comment Share on other sites More sharing options...
Chicago Storm Posted April 9, 2011 Share Posted April 9, 2011 Yeah we can even see them here on the Iowa side. Do they look surface based? We can't tell from here. Looks decent. Tops up to over 40KFT on last scan. Link to comment Share on other sites More sharing options...
turtlehurricane Posted April 9, 2011 Share Posted April 9, 2011 And the first thunderstorms/mini supercells are going up. There's no such thing as a non-rotating thunderstorm in this environment! Link to comment Share on other sites More sharing options...
janetjanet998 Posted April 9, 2011 Share Posted April 9, 2011 AWW 092245 WW 116 TORNADO IA NE SD 092250Z - 100600Z AXIS..95 STATUTE MILES EAST AND WEST OF LINE.. 15SSW LNK/LINCOLN NE/ - 25NNE SPW/SPENCER IA/ ..AVIATION COORDS.. 80NM E/W /41NW PWE - 58S RWF/ HAIL SURFACE AND ALOFT..3 INCHES. WIND GUSTS..70 KNOTS. MAX TOPS TO 550. MEAN STORM MOTION VECTOR 24035. LAT...LON 40639869 43499684 43499305 40639506 THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS FOR WOU6. Link to comment Share on other sites More sharing options...
CT Rain Posted April 9, 2011 Share Posted April 9, 2011 That's a nasty looking 21z sounding from OAX Link to comment Share on other sites More sharing options...
SmokeEater Posted April 9, 2011 Share Posted April 9, 2011 URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 116 NWS STORM PREDICTION CENTER NORMAN OK 550 PM CDT SAT APR 9 2011 THE NWS STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF WESTERN AND NORTHERN IOWA EASTERN NEBRASKA SOUTHEAST SOUTH DAKOTA EFFECTIVE THIS SATURDAY AFTERNOON AND SUNDAY MORNING FROM 550 PM UNTIL 100 AM CDT. SEVERAL TORNADOES SCATTERED DAMAGING WINDS ISOLATED WIND GUSTS TO 80 MPH POSSIBLE WIDESPREAD LARGE HAIL ISOLATED HAIL TO 3.0 INCHES IN DIAMETER POSSIBLE THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 95 STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES SOUTH SOUTHWEST OF LINCOLN NEBRASKA TO 25 MILES NORTH NORTHEAST OF SPENCER IOWA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6). 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 113...WW 114...WW 115... DISCUSSION...TSTMS EXPECTED TO INCREASE OVER WW AREA THROUGH LATE TONIGHT...WITH STRONG SUPERCELLS LIKELY AS CONVERGENCE/ASCENT AND WIND FIELD FURTHER STRENGTHEN WITH APPROACH OF UPR AIR IMPULSE IN FAST SWLY MID/UPR FLOW. LOW-LVL HELICITY/UPLIFT SHOULD MAXIMIZE NEAR AND ENE OF SFC LOW NOW NEAR KOFK...WITH THE LOW EXPECTED TO REMAIN LARGELY STNRY THROUGH WW PERIOD. 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 550. MEAN STORM MOTION VECTOR 24035. ...CORFIDI Link to comment Share on other sites More sharing options...
Stebo Posted April 9, 2011 Share Posted April 9, 2011 That's a nasty looking 21z sounding from OAX Surface dewpoint depression is a bit high for tornadoes however... Link to comment Share on other sites More sharing options...
SmokeEater Posted April 9, 2011 Share Posted April 9, 2011 BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 553 PM CDT SAT APR 9 2011 THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN CUMING COUNTY IN NORTHEAST NEBRASKA... CENTRAL THURSTON COUNTY IN NORTHEAST NEBRASKA... * UNTIL 645 PM CDT * AT 551 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED 5 MILES WEST OF BANCROFT...OR 36 MILES SOUTHWEST OF SIOUX CITY...AND MOVING NORTHEAST AT 35 MPH. * LOCATIONS IMPACTED INCLUDE... BANCROFT...WALTHILL...MACY AND ROSALIE. THE WARNED AREA INCLUDES HIGHWAY 77 IN NEBRASKA BETWEEN MILE MARKERS 155 AND 164. Link to comment Share on other sites More sharing options...
SmokeEater Posted April 9, 2011 Share Posted April 9, 2011 BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DULUTH MN 545 PM CDT SAT APR 9 2011 THE NATIONAL WEATHER SERVICE IN DULUTH MN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN PRICE COUNTY IN NORTH CENTRAL WISCONSIN... * UNTIL 630 PM CDT * AT 542 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR SHELDON...OR 14 MILES SOUTHEAST OF LADYSMITH...AND MOVING EAST AT 55 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... OGEMA AND PRENTICE AROUND 615 PM CDT. SPIRIT AND BRANTWOOD AROUND 625 PM CDT. Link to comment Share on other sites More sharing options...
CT Rain Posted April 9, 2011 Share Posted April 9, 2011 Surface dewpoint depression is a bit high for tornadoes however... Yeah LCLs are too high. Probably won't see violent tornadoes today. LCL heights a bit lower over IA but not alarmingly so. Link to comment Share on other sites More sharing options...
David Reimer Posted April 9, 2011 Share Posted April 9, 2011 My chase partner has a view of the base. Looks like an inflow tail is forming, coming in from the north. Watch his stream at www.texasstormchasers.com/live Link to comment Share on other sites More sharing options...
janetjanet998 Posted April 9, 2011 Share Posted April 9, 2011 LCLS should be coming down now..as temps drop a few degrees and dews creep up Link to comment Share on other sites More sharing options...
A-L-E-K Posted April 9, 2011 Share Posted April 9, 2011 good luck to any chasers trying to get some pics before the sun goes down. Link to comment Share on other sites More sharing options...
janetjanet998 Posted April 9, 2011 Share Posted April 9, 2011 looks like we have the MO river issue...some chasers will be stuck west of the river while it looks like alot are lined up just east... always a tough call rather to cross a river due to lack of bridges to get back east Link to comment Share on other sites More sharing options...
Stebo Posted April 9, 2011 Share Posted April 9, 2011 LCLS should be coming down now..as temps drop a few degrees and dews creep up Yeah, the tornado potential will go up as nocturnal cooling sets in and the LLJ ramps up. Link to comment Share on other sites More sharing options...
k*** Posted April 9, 2011 Share Posted April 9, 2011 looks like we have the MO river issue...some chasers will be stuck west of the river while it looks like alot are lined up just east... always a tough call rather to cross a river due to lack of bridges to get back east they could try to ford it, but i usually pay the indian. Link to comment Share on other sites More sharing options...
David Reimer Posted April 9, 2011 Share Posted April 9, 2011 Yeah, the tornado potential will go up as nocturnal cooling sets in and the LLJ ramps up. Plus no one cell has become particularly dominant yet. I do expect that to happen here within the next 30-45 minutes. Link to comment Share on other sites More sharing options...
David Reimer Posted April 9, 2011 Share Posted April 9, 2011 Just gotta wait for this to clean up a bit. Link to comment Share on other sites More sharing options...
janetjanet998 Posted April 9, 2011 Share Posted April 9, 2011 man shear is really picked up with backed ESE winds over Northeast NE deep layer 60 and 3km hel now 700 Link to comment Share on other sites More sharing options...
Chicago Storm Posted April 9, 2011 Share Posted April 9, 2011 looks like we have the MO river issue...some chasers will be stuck west of the river while it looks like alot are lined up just east... always a tough call rather to cross a river due to lack of bridges to get back east We're back on the east side of the river on the main supercell. Link to comment Share on other sites More sharing options...
janetjanet998 Posted April 9, 2011 Share Posted April 9, 2011 looks like a hook and couplet forming on that lead storm with the other two behind it turning into SUPS too Link to comment Share on other sites More sharing options...
Stebo Posted April 9, 2011 Share Posted April 9, 2011 BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA 639 PM CDT SAT APR 9 2011 THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A * TORNADO WARNING FOR... WESTERN MONONA COUNTY IN WEST CENTRAL IOWA... * UNTIL 730 PM CDT * AT 633 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR WHITING...OR 30 MILES SOUTH OF SIOUX CITY... AND MOVING SOUTHEAST AT 15 MPH. * LOCATIONS IMPACTED INCLUDE... WHITING...ONAWA...LEWIS AND CLARK STATE PARK...KENNEBEC...TURIN AND CASTANA. Link to comment Share on other sites More sharing options...
Stebo Posted April 9, 2011 Share Posted April 9, 2011 looks like a hook and couplet forming on that lead storm Yeah just went tor, looks like a right turning supercell, really grabbing a gear now. Probably going to have a cell split there too, very soon. Link to comment Share on other sites More sharing options...
SmokeEater Posted April 9, 2011 Share Posted April 9, 2011 TOG per spotter. Link to comment Share on other sites More sharing options...
David Reimer Posted April 9, 2011 Share Posted April 9, 2011 06:39PM CDT Tor<-Spotr 3 miles SW of Whiting, IA-Tornado on the ground 2 miles to our SW.. Link to comment Share on other sites More sharing options...
SmokeEater Posted April 9, 2011 Share Posted April 9, 2011 Decent circulation. Link to comment Share on other sites More sharing options...
David Reimer Posted April 9, 2011 Share Posted April 9, 2011 That tornado report was made by MIDSCAR (a dumbass). Several chasers saying that was a gustnado. Link to comment Share on other sites More sharing options...
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