Bill and Veronica switch from Pueblo to Boulder. They felt storm overn southern part of county was weakening and was also moving out of the domain. V2 reporting storm north of Burns WY has small wall cloud and brief landspout.

Liz Quoetone and Paul Schlatter (EWP Weekly Coordinators, 1-5 June 2009)

Thunderstorms have fired along the front range. We have groups sectorized to cover 2 CWAs. Veronica and Bill are WFO Pueblo. Pete and guest LMA expert turned warning forecaster Geoff are WFO CYS. VORTEX 2 is positioning to intersect the WY storms. Good luck to all!

Liz Quoetone and Paul Schlatter (EWP Weekly Coordinators, 1-5 June 2009)

LMA IOP (LWX and AKQ CWAs):

• After this event, need to have the full resolution data.  Smoothed VILMA data did not do any favors for visualization in AWIPS
• Trends in google earth were very useful until the storms were too far away

PAR Archived Cases (TS Erin and July 11, 2006)

• Were able to get prods out more quickly
• Erin event wouldn’t have been much of a problem in JAX or other tropical offices because they are used to those types of signatures and warning for them.  PAR really benefited an event like this with mini supercells in a rapidly changing environment

CASA Archived Cases (Feb 10,2009 and May 7, 2007)

• warnings without CASAS for May 7 would have been impossible b/c needed full resolution in time and space
• Couldn’t use CASA without using the 88D because couldn’t see what was happening aloft.  Great detail for the tornado threat
• Attenuation problem needed to be filled in my 88D

Liz Quoetone and Paul Schlatter (EWP Weekly Coordinators, 1-5 June 2009)

Teams are switching.  Pete/Jenni will work though TS Erin on the PAR, while Bill/Veronica will be running through May 9, 2007 on CASA.  Severe weather continues across MFR and EKA.

Liz Quoetone and Paul Schlatter (EWP Weekly Coordinators, 1-5 June 2009)

Archived cases for PAR and CASA are being run.  Bill/Veronica are working the August 19, 2007 Tropical Storm Erin case on PAR and Pete/Jenni are going through Feb 10, 2009 supercells with CASA.  Will switch around 7 PM.

Liz Quoetone and Paul Schlatter (EWP Weekly Coordinators, 1-5 June 2009)

Wrapping up IOP in the LMA network across E. VA.  Right at this time MESH is showing 2.00 inches for the storm NW of Fredericksburg.  Bill/Veronica issued a SVR for quarters in NC Rockingham County right before starting the survey.  Pete/Jenni saw several hail spikes out of the convection in AKQ, where they were working and had issued an SVR just prior to the survey as well.  MESH once again allowed for finding the storms that had the best threat for SVR hail on a day with several pulse/multicell storms in the area. Dinner time til 5:30, then PAR/CASA archived cases.

Liz Quoetone and Paul Schlatter (EWP Weekly Coordinators, 1-5 June 2009)

1.00 inch hail report came in, listed as occuring at 2124 UTC in Albemarle County, VA.  MESH at the time and 15 min prior had a very small core of 1.00 inch.  Could be a timing of the report issue.  Bill/Veronica didn’t issue a warning for that area.  At the time, prior to the report, it didn’t look severe.  LMA had very low values in that area, probably because of the distace from the sensor.

Liz Quoetone and Paul Schlatter (EWP Weekly Coordinators, 1-5 June 2009)

Relfectivity at -20C clued in Pete/Jenni on the potential for hail threat out of a left moving storm in Augusta County, VA.  Not much lightning with it yet but has sufficient core for marginally severe hail, and was moving to the left of the mean flow.  LMA didn’t show much, it had significant CGs, almost all CGs so it probably wouldn’t have been any help at all for this particular storm (2105 UTC), in fact if relying too heavily on LMA would have missed it.

Liz Quoetone and Paul Schlatter (EWP Weekly Coordinators, 1-5 June 2009)

Pete noticed that at ~1950 UTC SW of KLWX, three storms had different lightning characteristics. The furthest SW had CGs before LMA showed anything, the in the middle had LMA and CGs at the same time, and the furthest north had LMA first prior to any CGs.  The furthest SW storm was the most severe on radar and highest lightning concentration on LMA, thus Pete quickly issued an SVR.

Liz Quoetone and Paul Schlatter (EWP Weekly Coordinators, 1-5 June 2009)

LMA (Sterling/Mt. Holly CWAs):

All 4 folks viewed event over Eastern US in Sterling’s LMA area. This was a good first case to illustrate some of the characteristics of the data sets. Some in the group were surprised at the value of the data set, thought to be especially beneficial for areas with no radar coverage. Vilma was especially useful, Some questions that came up were in regard to the meaning of LTGiC  vs LTGCG which initiate at the same or different times in the storms life.  Looking forward to getting more exposure to data sets.

MR/MS IOP over N. CA and S. OR (MFR CWA):

No areas of rotation so rotation tracks not very useful in this event.  However, MESH was very useful, especially since it appeared to be accurate.  They paid attention to trends in MESH and how they correlated to the reports they received.  Reflectivity at the -20 level and the height of the 50 dBZ was not impressive, nor was VIL, and these agreed with MESH but it was useful that MESH actually provided an accurate hail size.  VIL 45 was roughtly their warning threshold.

Pete mentioned that -20 C was useful to identify where the most likely location of the hail cores were located.  He wished there was more information provided by gridded products for the theat of winds.  He noticed a weak, though well defined MARC signature in the SRM data via All Tilts from KMAX shortly after issuing the first SVR.  He tries to really examine the NSE (near storm environment) closely to aid in the warning decision process for severe straight line winds.

Veronica:  Echoed statements from others and added that 50 dBZ and 30 dBZ contours and the reflectivity at -20 C were useful in the evaluation of hail threat for this marginal event.

Liz Quoetone and Paul Schlatter (EWP Weekly Coordinators, 1-5 June 2009)