Hoosier Posted May 20, 2014 Share Posted May 20, 2014 Worst pattern ever http://twitter.com/islivingston/status/468558849658875904/photo/1 Great pic! Link to comment Share on other sites More sharing options...
Jayhawkers Posted May 20, 2014 Share Posted May 20, 2014 Gotta love when the SPC Forecasters change shifts... The discussion went from optimistic for Wednesday with the 06Z D2 to pretty pessimistic at the 1730Z update... Of course all the concerns are pretty legitimate. Seems like the 0600Z outlook was largely premised off of the NAM which would provide for a potentially volatile localized environment. Link to comment Share on other sites More sharing options...
icebreaker5221 Posted May 20, 2014 Share Posted May 20, 2014 Looks like Mark and Ian are all over that isolated, well-structured cell heading towards Torrington, WY. Once again looking forward to some great pics! Link to comment Share on other sites More sharing options...
SluggerWx Posted May 20, 2014 Share Posted May 20, 2014 In the car near Parker, CO ATTM, all of Denver metro is dark under this giant cell Sent from my RM-927_nam_vzw_100 using Tapatalk Link to comment Share on other sites More sharing options...
SluggerWx Posted May 20, 2014 Share Posted May 20, 2014 Sent from my RM-927_nam_vzw_100 using Tapatalk Link to comment Share on other sites More sharing options...
SluggerWx Posted May 20, 2014 Share Posted May 20, 2014 Underneath the couplet in Saddle Rock, CO Sent from my RM-927_nam_vzw_100 using Tapatalk Link to comment Share on other sites More sharing options...
SluggerWx Posted May 20, 2014 Share Posted May 20, 2014 3 min ago as the sirens went off Sent from my RM-927_nam_vzw_100 using Tapatalk Link to comment Share on other sites More sharing options...
Jayhawkers Posted May 21, 2014 Share Posted May 21, 2014 3 separate supercells hundreds to thousands of miles apart, all associated with the same boundary... Pretty amazing. Relatively speaking long-lived supercells in NE Colorado, and the Nebraska panhandle... Including a tornadic supercell near Scottsbluff, NE. Then another discrete supercell just popped west of Chicago and already has hail estimated 2+ inches. Link to comment Share on other sites More sharing options...
Ian Posted May 21, 2014 Share Posted May 21, 2014 Looks like Mark and Ian are all over that isolated, well-structured cell heading towards Torrington, WY. Once again looking forward to some great pics!Nothing too exciting so far. Lots of cloud debris and we left the northern one initially since the other had better bases. Then it ended up outflow dominant. We are wandering along in between the two now. Link to comment Share on other sites More sharing options...
Jayhawkers Posted May 21, 2014 Share Posted May 21, 2014 Long-lived non-tornadic supercell still in progress near the KS/CO border. With golfball sized hail still being reported. Doesn't appear that that MCS depicted by models will occur though, at least basing off of recent radar trends. Link to comment Share on other sites More sharing options...
nrgjeff Posted May 21, 2014 Share Posted May 21, 2014 Excellent set-up should unfold today in northeast Colorado, perhaps fairly close to the Denver Metro. Fortunately the classic Denver Cyclone is just east of populated areas. One can grab a decent lunch in the 'burbs and then find a hose or tube not harming anyone just outside of town. I don't have much to add to the SPC 10%, so will get into background just a bit. Many readers may already know this, but the geography adds confidence to the Denver Cyclone set-up. In addition to the north-south Rockies promoting the lee trough, the east-west Palmer Divide enhances low level shear. Mechanics are the same. Winds cross it and turn cyclonically. Palmer runs south of Denver, approximately from Colorado Springs east. Already backing surface winds will back more north of the Palmer Divide, northeast of the Denver Metro. Today we have adequate upper level winds coming out, in contrast to say mid-June. Therefore the 10% TOR probability is clearly justified. Good luck. Chase safely and effectively. This is near Twistex home base. Honor their memory today. Link to comment Share on other sites More sharing options...
Ian Posted May 21, 2014 Share Posted May 21, 2014 We are in Cheyenne will drop south in a bit. Fingers crossed. Link to comment Share on other sites More sharing options...
Thunder Road Posted May 21, 2014 Share Posted May 21, 2014 All hail the HRRR! (fwiw, it nailed the evolution in CO yesterday) Link to comment Share on other sites More sharing options...
Buckeye05 Posted May 21, 2014 Share Posted May 21, 2014 URGENT - IMMEDIATE BROADCAST REQUESTEDTORNADO WATCH NUMBER 165NWS STORM PREDICTION CENTER NORMAN OK1235 PM MDT WED MAY 21 2014THE NWS STORM PREDICTION CENTER HAS ISSUED A* TORNADO WATCH FOR PORTIONS OFNORTH CENTRAL COLORADOSOUTHEAST WYOMING* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1235 PMUNTIL 800 PM MDT.* PRIMARY THREATS INCLUDE...A FEW TORNADOES LIKELY WITH A COUPLE INTENSE TORNADOES POSSIBLEWIDESPREAD LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAILEVENTS TO 3 INCHES IN DIAMETER POSSIBLESCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLETHE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTEMILES EAST AND WEST OF A LINE FROM 50 MILES NORTHWEST OFTORRINGTON WYOMING TO 45 MILES WEST SOUTHWEST OF LIMON COLORADO.FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCHOUTLINE UPDATE (WOUS64 KWNS WOU5). Link to comment Share on other sites More sharing options...
Windspeed Posted May 21, 2014 Share Posted May 21, 2014 The cell over Denver proper is getting interesting. There is some weak rotation on the southern appendage. Link to comment Share on other sites More sharing options...
Windspeed Posted May 21, 2014 Share Posted May 21, 2014 079 WFUS55 KBOU 211956 TORBOU COC001-005-031-212030- /O.NEW.KBOU.TO.W.0017.140521T1956Z-140521T2030Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DENVER CO 156 PM MDT WED MAY 21 2014 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * TORNADO WARNING FOR... NORTHWESTERN ARAPAHOE COUNTY IN NORTHEAST COLORADO... CENTRAL DENVER COUNTY IN NORTHEAST COLORADO... WESTERN ADAMS COUNTY IN NORTHEAST COLORADO... * UNTIL 230 PM MDT * AT 156 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO WAS LOCATED OVER COMMERCE CITY...OR 6 MILES NORTHEAST OF DENVER...MOVING NORTHEAST AT 10 MPH. THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT WAS IN EFFECT. HAZARD...TORNADO AND HALF DOLLAR SIZE HAIL. SOURCE...RADAR INDICATED ROTATION. IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL OCCUR. TREE DAMAGE IS LIKELY. * LOCATIONS IMPACTED INCLUDE... DENVER...NORTHWESTERN AURORA...SOUTHERN THORNTON...EASTERN ARVADA...SOUTHERN WESTMINSTER...COMMERCE CITY...SOUTHEASTERN NORTHGLENN...BRIGHTON...EASTERN ENGLEWOOD...GREENWOOD VILLAGE... FEDERAL HEIGHTS...SOUTHWESTERN DENVER INTERNATIONAL AIRPORT AND BARR LAKE. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW! MOVE TO A BASEMENT OR 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. Link to comment Share on other sites More sharing options...
andyhb Posted May 21, 2014 Share Posted May 21, 2014 MESOSCALE DISCUSSION 0640NWS STORM PREDICTION CENTER NORMAN OK 0258 PM CDT WED MAY 21 2014 AREAS AFFECTED...DENVER METRO VICINITY CONCERNING...TORNADO WATCH 165... VALID 211958Z - 212100Z THE SEVERE WEATHER THREAT FOR TORNADO WATCH 165 CONTINUES. SUMMARY...SUPERCELLS OVER THE DENVER METRO AREA WILL LIKELY CONTINUE TO INTENSIFY OVER THE NEXT HOUR OR SO AND POSE A LARGE TO VERY LARGE HAIL THREAT. THE POTENTIAL FOR A MESOCYCLONIC TORNADO APPEARS TO BE INCREASING TOO. DISCUSSION...SURFACE MESOANALYSIS SHOWS STRONG ELY FLOW FOCUSED IN THE DCVZ IN THE IMMEDIATE VICINITY OF THE DENVER METRO AREA. KFTG RADAR IMAGERY OVER THE PAST HOUR SHOWS A FEW STORMS EXHIBITING SUPERCELL STRUCTURE WITH THE MOST INTENSE STORM OVER THE DENVER CITY LIMITS AS OF 1955Z. THE BACKED LOW-LEVEL FLOW ATTRIBUTED TO THE DCVZ AND THE PROXIMITY OF THE OUTFLOW BOUNDARY WOULD SUGGEST LOW-LEVEL STORM ROTATION WILL PROBABLY INCREASE. ADDITIONAL THREATS WITH THE DENVER AREA ACTIVITY INCLUDE LARGE TO VERY LARGE HAIL. THE NSSL-SHAVE EXPERIMENT DOCUMENTED GOLFBALL HAIL OVER SWRN DENVER WITHIN THE PAST 30-45 MINUTES AND THE LARGE HAIL THREAT WILL PROBABLY INCREASE FURTHER AS THE STORMS CONTINUE TO MATURE/ORGANIZE. ..SMITH.. 05/21/2014 Link to comment Share on other sites More sharing options...
Buckeye05 Posted May 21, 2014 Share Posted May 21, 2014 Definitely cycling now between Aurora and Bennett. Link to comment Share on other sites More sharing options...
andyhb Posted May 21, 2014 Share Posted May 21, 2014 Crazy RFD showing up on KFTG. Link to comment Share on other sites More sharing options...
JoMo Posted May 21, 2014 Share Posted May 21, 2014 Lots of reports on spotter network of a rain wrapped tornado on the ground with the Denver cell. Link to comment Share on other sites More sharing options...
Jayhawkers Posted May 21, 2014 Share Posted May 21, 2014 That's a pretty intense supercell east of Denver... Large hail core, a very evident hook echo, observed rotating wall cloud, would be shocked if it didn't put down a large tornado at some point given how low the wall cloud is as well as pretty strong low-level flow. EDIT: tornado in progress Link to comment Share on other sites More sharing options...
Jayhawkers Posted May 21, 2014 Share Posted May 21, 2014 Quite an amazing feed from the storm chasers for TWC.... The entire structure is rotating. Link to comment Share on other sites More sharing options...
TalcottWx Posted May 21, 2014 Share Posted May 21, 2014 That is a very impressive radar over Denver. Has to be a tornado Link to comment Share on other sites More sharing options...
Hvward Posted May 21, 2014 Share Posted May 21, 2014 This thing could hit KFTG near Bennett. Looks like it will pass just north though. Link to comment Share on other sites More sharing options...
Jayhawkers Posted May 21, 2014 Share Posted May 21, 2014 This thing could hit the NWS near Bennett. Looks like it will pass just north though. the NWS WFO is in boulder? What are you talking about? Link to comment Share on other sites More sharing options...
andyhb Posted May 21, 2014 Share Posted May 21, 2014 Storm is not looking inflow dominant right now. Link to comment Share on other sites More sharing options...
Hvward Posted May 21, 2014 Share Posted May 21, 2014 the NWS WFO is in boulder? What are you talking about? My fault, I meant the radar. KFTG Link to comment Share on other sites More sharing options...
TalcottWx Posted May 21, 2014 Share Posted May 21, 2014 the NWS WFO is in boulder? What are you talking about? No need to be snippy Link to comment Share on other sites More sharing options...
Jayhawkers Posted May 21, 2014 Share Posted May 21, 2014 Storm is not looking inflow dominant right now. what makes you say that? Link to comment Share on other sites More sharing options...
Jayhawkers Posted May 21, 2014 Share Posted May 21, 2014 No need to be snippy sorry... Should've phrased the question better... Link to comment Share on other sites More sharing options...
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