Alert archive / Indiana / Frost Advisories in 2010

Frost Advisory 5, NWS Northern Indiana

April 27, 201010 counties in Indiana; Allen County, Van Wert County, Ohio

NWS Northern Indiana issued this frost advisory at Apr 27, 2010, 11:49 AM EDT for 10 counties in Indiana; Allen County, Van Wert County, Ohio. It took effect at Apr 28, 2010, 4:00 AM EDT. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Apr 27, 2010, 11:49 AM EDT (15:49 UTC)
In effect from
Apr 28, 2010, 4:00 AM EDT
Expired
Apr 28, 2010, 8:00 AM EDT
In force
4 hr
Issued by
NWS Northern Indiana

Counties Adams County, IN, Blackford County, IN, Cass County, IN, Grant County, IN, Huntington County, IN, Jay County, IN, Miami County, IN, Wabash County, IN, Wells County, IN, White County, IN, Allen County, OH, Van Wert County, OH

The radar

The Northern Indiana radar (KIWX), 75 km from the middle of the area, began a volume at 15:48 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

Lincoln, IL (KILX), launched 12:00Z, 3.8 hours before the alert went out and 274 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, Lincoln, IL at 12:00Z on 2010-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Lincoln, IL at 12:00Z on 2010-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1470 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Northern Indiana wrote its last area forecast discussion before this frost advisory went out at Apr 26, 7:33 PM EDT, 16 hours 16 minutes earlier.

Area forecast discussion, Apr 26, 7:33 PM EDT, 16 hours 16 minutes before
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The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 27, 3:38 AM EDTFreeze WatchIWXAdams, Allen, Blackford, Cass, DeKalb, Elkhart and 15 more8 hr
Apr 27, 11:49 AM EDTFreeze WarningIWXAllen, DeKalb, Elkhart, Fulton, LaGrange, Marshall and 5 more20 hr
Apr 27, 2:28 PM EDTSmall Craft AdvisoryIWX9 hr
Apr 27, 10:41 AM EDTRiver Flood WarningIWXWilliams24 hr

Nearby

Frost Advisories in Indiana, 2010Frost Advisories in Ohio, 2010Every frost advisory in 2010

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.