Alert archive / Indiana / Flash Flood Watches in 2020

Flash Flood Watch 1, NWS Northern Indiana

March 27, 202019 counties in Indiana; 6 counties in Ohio; Cass County, Michigan

NWS Northern Indiana issued this flash flood watch at Mar 27, 2020, 1:53 PM EDT for 19 counties in Indiana; 6 counties in Ohio; Cass County, Michigan. It took effect at Mar 28, 2020, 12:00 AM EDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Mar 27, 2020, 1:53 PM EDT (17:53 UTC)
In effect from: Mar 28, 2020, 12:00 AM EDT
Expired: Mar 28, 2020, 10:53 AM EDT
In force: 11 hr
Issued by: NWS Northern Indiana
Flood severity: None

All 26 counties

Adams County, IN, Allen County, IN, Blackford County, IN, Cass County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Grant County, IN, Huntington County, IN, Jay County, IN, Marshall County, IN, Miami County, IN, Noble County, IN, Pulaski County, IN, Starke County, IN, Wabash County, IN, Wells County, IN, White County, IN, Whitley County, IN, Cass County, MI, Allen County, OH, Defiance County, OH, Henry County, OH, Paulding County, OH, Putnam County, OH, Van Wert County, OH

The radar

The Northern Indiana radar (KIWX), 44 km from the middle of the area, began a volume at 17:54 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 5.9 hours before the alert went out and 225 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 807 m above ground
0-6 km bulk shear: 82 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 264 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 flash flood watch went out at Mar 27, 12:50 PM EDT, 1 hour 3 minutes earlier.

Area forecast discussion, Mar 27, 12:50 PM EDT, 1 hour 3 minutes before

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Hazardous weather outlook, Mar 27, 8:57 AM EDT, 4 hours 56 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 27, 4:29 AM EDT	Dense Fog Advisory	IWX	DeKalb, Elkhart, Fulton, LaGrange, Marshall, Noble and 3 more	7 hr
Mar 27, 6:48 AM EDT	River Flood Warning	IWX	Adams, Wells	5 days
Mar 27, 3:33 PM EDT	Gale Watch	IWX		13 hr
Mar 27, 6:48 AM EDT	River Flood Warning	IWX	Defiance, Fulton, Williams	6 days

Nearby

Flash Flood Watches in Indiana, 2020 Flash Flood Watches in Ohio, 2020 Flash Flood Watches in Michigan, 2020 Every flash flood watch in 2020

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.