Alert archive / South Dakota / Freeze Warnings in 2015

Freeze Warning 1, NWS Aberdeen, SD

May 17, 20156 counties in South Dakota

NWS Aberdeen, SD issued this freeze warning at May 17, 2015, 4:11 PM CDT for 6 counties in South Dakota. It took effect at May 18, 2015, 5:00 AM CDT. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 17, 2015, 4:11 PM CDT (21:11 UTC)
In effect from: May 18, 2015, 5:00 AM CDT
Expired: May 18, 2015, 7:06 AM CDT
In force: 2 hr
Issued by: NWS Aberdeen, SD

Counties Brown County, SD, Campbell County, SD, Corson County, SD, Edmunds County, SD, McPherson County, SD, Walworth County, SD

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 9.2 hours before the alert went out and 128 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: 37 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 734 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 198 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 freeze warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Aberdeen, SD wrote its last area forecast discussion before this freeze warning went out at May 17, 3:44 PM CDT, 27 minutes earlier.

Area forecast discussion, May 17, 3:44 PM CDT, 27 minutes before

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Hazardous weather outlook, May 17, 5:03 AM CDT, 11 hours 8 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ABERDEEN SD
503 AM CDT SUN MAY 17 2015

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-181015-
TRAVERSE-BIG STONE-CORSON-CAMPBELL-MCPHERSON-BROWN-MARSHALL-
ROBERTS-WALWORTH-EDMUNDS-DAY-DEWEY-POTTER-FAULK-SPINK-CLARK-
CODINGTON-GRANT-HAMLIN-DEUEL-STANLEY-SULLY-HUGHES-HYDE-HAND-JONES-
LYMAN-BUFFALO-
503 AM CDT SUN MAY 17 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL
MINNESOTA...CENTRAL SOUTH DAKOTA...NORTH CENTRAL SOUTH DAKOTA AND
NORTHEAST SOUTH DAKOTA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE POSSIBLE ACROSS THE REGION TODAY EMBEDDED WITHIN
THE LARGER AREA OF RAINFALL. OVERALL THE SEVERE THREAT IS
LOW...ALTHOUGH THERE IS A SMALL THREAT EAST OF I-29 AND ON INTO
MINNESOTA. IF STORMS MANAGE TO DEVELOP OVER WEST CENTRAL MINNESOTA
TODAY...HAIL IS POSSIBLE...ALONG WITH A VERY ISOLATED TORNADO
THREAT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

FROST AND FREEZE CONDITIONS ARE POSSIBLE LATE MONDAY NIGHT INTO
TUESDAY MORNING AS FORECAST LOW TEMPERATURES DROP INTO THE UPPER
20S TO LOW 30S.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY ALONG AND EAST OF I-29.

TMT

In the hours before

Local storm report, May 17, 11:07 AM CDT, 5 hours 4 minutes before

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Local storm report, May 17, 11:08 AM CDT, 5 hours 3 minutes before

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Special weather statement, May 17, 12:21 PM CDT, 3 hours 50 minutes before

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Local storm report, May 17, 2:50 PM CDT, 1 hour 21 minutes before

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Local storm report, May 17, 3:53 PM CDT, 18 minutes before

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The office that day

Everything else NWS Aberdeen, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 16, 8:19 PM CDT	Flash Flood Warning	ABR	Corson	6 hr
May 17, 3:44 AM CDT	Wind Advisory	ABR	Brown, Buffalo, Campbell, Clark, Codington, Corson and 20 more	27 hr
May 17, 5:20 AM CDT	Special Weather Statement	ABR	Dewey	40 min
May 17, 8:25 AM CDT	Areal Flood Advisory	ABR	Campbell, Corson, Dewey, Walworth	3 hr
May 17, 9:21 AM CDT	Areal Flood Warning	ABR	Campbell, Corson, Dewey, Walworth	6 hr
May 17, 9:33 AM CDT	Areal Flood Warning	ABR	Buffalo, Hand, Hyde	6 hr
May 17, 2:54 PM CDT	Areal Flood Warning	ABR	Campbell, Corson, Dewey, Walworth	6 hr
May 17, 3:18 PM CDT	Areal Flood Warning	ABR	Buffalo, Hand, Hyde	6 hr

Nearby

Freeze Warnings in South Dakota, 2015 Every freeze warning in 2015

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.