02/22/2013 @ KCLE

12:00 - 20:25 UTC
WX Scenario:

Overrunning ahead of a surface warm/occluded front leads of many MOG icing PIREPs in the vicinity of KCLE.  Freezing rain and ice pellets reported in and around KCLE throughout the event.

Discussion:

Cellular SLW='yes icing' features across the radar domain with a 50% or greater percent coverage at the time of this Light and Moderate PIREP.  Almost no freezing drizzle detected aloft by the algorithm!  No SLW icing detected by the modifies non-polarized algorithm.

PIREP: '20130222 1200 UTC 41.36 -82.16 MD80 LPR UA /OV DJB/TM 1200/FL140/TP MD80/SK TOPS 140/TA M10/IC LIGHT RIME ICE'

IHL 3.0 and 0.5 degree plots

PIREP: '20130222 1217 UTC 41.42 -81.85 UNKN CLE UA /OV CLE /TM 1217 /FLUNKN /TP UNKN /TA UNKN /IC MOD MX /RM FAP DURD ALL TYPES ACFT'

IHL 3.0 and 0.5 degree plots

NEXRAD Images

 

PING

Discussion:

Cellular SLW='yes icing' features across the radar domain with a 50% or greater percent coverage at the time of these two 'light severity'  PIREPs.  Almost no freezing drizzle detected aloft by the algorithm!  No SLW icing detected by the modifies non-polarized algorithm.

PIREP: '20130222 1303 UTC 41.36 -82.16 E145Q LPR UA /OV DJB/TM 1303/FL090/TP E145/Q/TA M10/IC LGT RIME/RM DURGC 090-150'
PIREP: '20130222 1309 UTC 41.42 -81.63 E145 BKL UA /OV CLE090010 /TM 1309 /FL040 /TP E145 /SK OVC040-TOP160 /TA 01 /TB NEG /IC LGT RIME /RM DURC'

IHL 3.0 and 0.5 degree plots

NEXRAD Images

PING
 
Discussion:

Significant SLW called out in the radar volume at time of MOG PIREP.  The modified non-polarized SLW algorithm had a narrow band of SLW near the cloud top, but no the significant volumetric coverage shown in the polarized IHL.

PIREP: '20130222 1414 UTC 41.50 -81.85 E145 CLE UA /OV CLE360005 /TM 1414 /FL026 /TP E145 /TA UNKN /IC MOD CLR 026 /RM DURC'

IHL 3.0 and 0.5 degree plots

NEXRAD Images

PING
 
Discussion:

The general IHL view in this closest radar volume does not match the reported 'null severity' PIREP.  Significant SLW called out in the radar volume.  A curious ring of IHL='no icing' is evident at all tilts, specifically at 50-80km in the 0.5 degree tilt.  This could be due to a 'warm nose' detected in the model temperature profile.  Some patches of freezing drizzle are now detected in the extreme western portion of the volume for the first time.

PIREP: '20130222 1505 UTC 41.26 -82.10 E145 LPR UA /OV CLE230015 /TM 1505 /FL030 /TP E145 /TA 00 /IC NEG 100-030 /RM DURD'

IHL 3.0 and 0.5 degree plots

NEXRAD Images

PING
 
Discussion:

The IHL plot at this time matches well with the reported 'null severity' PIREP.  In high and low tilts, the weak return area near the radar is determined to have almost no positive icing.  The higher cloud deck that has translated east of KCLE still has cellular SLW features embedded in the polarized IHL.

PIREP: '20130222 1807 UTC 41.33 -81.85 B732 CLE UA /OV CLE180005 /TM 1807 /FLUNKN /TP B732 /SK OVC017-TOP045 /TA UNKN /TB NEG /IC NEG /RM HYR SCT LYRS/DURC'

IHL 3.0 and 0.5 degree plots

NEXRAD Images

PING
 
Discussion:

The IHL plot at this time matches well with the reported 'null severity' PIREP.  In high and low tilts, the weak return area near the radar is determined to have almost no positive icing by the polarized IHL algorithm.  ** Not yet sure why the non-polarized IHL shows some small areas of freezing drizzle when the polarized algorithm shows nothing. **

PIREP: '20130222 2025 UTC 41.65 -81.54 SR22 CGF UA /OV CLE045020 /TM 2025 /FL030 /TP SR22 /SK OVC030-TOP050 /TA M09 /IC NEG'

IHL 3.0 and 0.5 degree plots

NEXRAD Images

PING

Meteogram

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