Alert archive / Idaho / Mesoscale Discussions in 2004

Mesoscale Discussion 950

May 27, 20049 counties in Idaho

The Storm Prediction Center issued this mesoscale discussion at May 27, 2004, 4:24 PM MDT for 9 counties in Idaho. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 27, 2004, 4:24 PM MDT (22:24 UTC)
Expired
May 27, 2004, 6:30 PM MDT
In force
2 hr
Issued by
the Storm Prediction Center

Counties Blaine County, ID, Camas County, ID, Cassia County, ID, Elmore County, ID, Gooding County, ID, Jerome County, ID, Lincoln County, ID, Minidoka County, ID, Twin Falls County, ID

The radar

The Boise radar (KCBX), 143 km from the middle of the area, began a volume at 22:25 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Boise Airport, ID (KBOI), launched 12:00Z, 10.4 hours before the alert went out and 144 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Boise Airport, ID at 12:00Z on 2004-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 134 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Boise Airport, ID at 12:00Z on 2004-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 136 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
134 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
972 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
136 m²/s²
0-3 km storm-relative helicity
155 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

582 
ACUS11 KWNS 272225
SWOMCD
SPC MCD 272224 
IDZ000-280030-

MESOSCALE DISCUSSION 0950
NWS STORM PREDICTION CENTER NORMAN OK
0524 PM CDT THU MAY 27 2004

AREAS AFFECTED...SRN ID

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 272224Z - 280030Z

ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS SRN ID THROUGH
THIS EVENING. A SEVERE THUNDERSTORM WATCH IS POSSIBLE DURING THE
NEXT HOUR OR SO.

THROUGH THIS EVENING...SCATTERED THUNDERSTORMS ARE ANTICIPATED
ACROSS SRN ID IN REGION OF STRONG UPPER-LEVEL DIVERGENCE ASSOCIATED
WITH LEFT FRONT QUADRANT OF THE JET APPROACHING FROM THE WEST.
WIDESPREAD CLOUD COVER HAS LIMITED SURFACE HEATING...AND MARGINAL
INSTABILITY WILL LIKELY BE A MITIGATING FACTOR FOR A MORE
SIGNIFICANT SEVERE WEATHER EVENT. HOWEVER...MLCAPE VALUES AROUND 500
J/KG COMBINED WITH VERY STRONG DEEP-LAYER SHEAR OF 45-55 KT...MAY
ALLOW FOR A FEW LONG-LIVED/ORGANIZED THUNDERSTORMS. STORMS WILL
TRACK GENERALLY ENEWD AT 25-30 KT. ROTATING UPDRAFTS MAY CONTAIN
LARGE HAIL WHILE POSSIBLE SMALL-SCALE BOW SEGMENTS WILL BE CONDUCIVE
FOR DAMAGING SURFACE WINDS. CONVECTIVE TRENDS WILL BE
MONITORED...HOWEVER...THREAT AT THIS TIME APPEARS MARGINAL FOR A WW.

..BANACOS.. 05/27/2004

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...PIH...BOI...

42441582 42931616 43311615 43591543 43861445 43701362
43281312 42731295 42421318 42241360 42311548

Nearby

Mesoscale Discussions in Idaho, 2004Every mesoscale discussion in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.