Alert archive / South Dakota / Flash Flood Warnings in 2016

Flash Flood Warning 2, NWS Aberdeen, SD

July 26, 2016Buffalo County, Lyman County, South Dakota

NWS Aberdeen, SD issued this flash flood warning at Jul 26, 2016, 5:12 PM CDT for Buffalo County, Lyman County, South Dakota. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 26, 2016, 5:12 PM CDT (22:12 UTC)
Expired: Jul 26, 2016, 8:15 PM CDT
In force: 3 hr
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Flood severity: None

Counties Buffalo County, SD, Lyman County, SD

The radar

The Aberdeen radar (KABR), 194 km from the middle of the area, began a volume at 22:16 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.

What was reported inside it

Time	Report	Where	Remark
Jul 26, 6:10 PM CDT	FLASH FLOOD	5 Ne Presho, SD	WATER BEGINNING TO FLOW OVER SECONDARY ROADS. LOTS OF STANDING WATER IN FIELDS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this flash flood warning; the first came 58 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 10.2 hours before the alert went out and 148 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: 488 J/kg
Mixed-layer CIN: -298 J/kg
Mixed-layer LCL: 1099 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: -9 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

167 
WGUS53 KABR 262212
FFWABR
SDC017-085-270115-
/O.NEW.KABR.FF.W.0002.160726T2212Z-160727T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
512 PM CDT TUE JUL 26 2016

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL BUFFALO COUNTY IN CENTRAL SOUTH DAKOTA...
  LYMAN COUNTY IN CENTRAL SOUTH DAKOTA...

* UNTIL 815 PM CDT

* AT 510 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. RADAR ESTIMATES OF UP TO TWO
  INCHES OF RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LOWER BRULE...PRESHO...FORT THOMPSON...LYMAN...KENNEBEC...
  RELIANCE...VIVIAN...SHELBY...ETBAUER HILL...5 MILE CORNER...
  LEES CORNER...FATE DAM...BYRE LAKE...
  COUNSELOR CREEK BOAT ACCESS AREA...TAILRACE REC AREA...
  MEDICINE BUTTE...EARLING HILLS...CROW CREEK HOUSING...
  LAKE SHARPE AND LAKE FRANCIS CASE.

ADDITIONAL RAINFALL AMOUNTS OF 2 TO 4 INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED
ROADS. FIND AN ALTERNATE ROUTE.

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

&&

LAT...LON 4383 10034 4385 10034 4385 10037 4414 10037
      4414 9990 4412 9987 4414 9976 4410 9964
      4410 9961 4414 9960 4414 9913 4393 9912
      4393 9935 4390 9936 4386 9931 4381 9935

$$

DORN

1 follow-up statement

663 
WGUS73 KABR 270114
FFSABR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
814 PM CDT TUE JUL 26 2016

SDC017-085-270120-
/O.EXP.KABR.FF.W.0002.000000T0000Z-160727T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BUFFALO SD-LYMAN SD-
814 PM CDT TUE JUL 26 2016

...THE FLASH FLOOD WARNING FOR CENTRAL BUFFALO AND LYMAN COUNTIES
WILL EXPIRE AT 815 PM CDT...

THE HEAVY RAIN THREAT HAS ENDED. FLOODING IS NO LONGER EXPECTED TO
POSE A THREAT. HOWEVER...AREAS THAT RECEIVED EXCESSIVE AMOUNTS OF
RAINFALL WILL LIKELY NEED SEVERAL HOURS TO DRAIN OFF ALL THE
STANDING WATER. PLEASE CONTINUE TO HEED ANY ROAD CLOSURES.

LAT...LON 4383 10034 4385 10034 4385 10037 4414 10037
      4414 9990 4412 9987 4414 9976 4410 9964
      4410 9961 4414 9960 4414 9913 4393 9912
      4393 9935 4390 9936 4386 9931 4381 9935

$$

DORN

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Jul 26, 3:37 PM CDT, 1 hour 35 minutes earlier.

Area forecast discussion, Jul 26, 3:37 PM CDT, 1 hour 35 minutes before

Area Forecast Discussion
National Weather Service Aberdeen SD
337 PM CDT TUE JUL 26 2016

.SHORT TERM...(This Evening through Thursday Afternoon)
Issued at 337 PM CDT TUE JUL 26 2016

Scattered showers and storms have brought some decent rainfall
mainly to areas along and in the James Valley from this morning into
the afternoon. The clouds and rain with this have also kept
temperatures in check across this region. Several outflow boundaries
along with a frontal zone extending across our northwest cwa and
across southern nd and upper level short wave lift have been
responsible for this convection. Despite all of the convection, there
is still plenty of deep instability across the region along with
decent wind shear west and south in our region. Thus, with the
frontal boundary to our north sinking south through the region
tonight and Wednesday along with some upper short waves moving over,
expect showers and storms to continue in the east with new shower
and storm development farther west. Thus, will continue with high
pops across the region tonight into Wednesday afternoon.

Surface high pressure and drier air will then push into the region
for Wednesday night and Thursday as Canadian air moves in. Thursday
should be mainly a mostly sunny day with dry conditions. Both
Wednesday and Thursday should have below normal temperatures with
highs in the mid 70s to the lower 80s.

.LONG TERM...(Thursday Evening through Tuesday)
Issued at 337 PM CDT TUE JUL 26 2016

The long term portion of the forecast begins with a surface high
pressure over the region with northwesterly flow aloft. The high
pressure will keep most of the CWA dry through Friday afternoon. A
surface low pressure system and upper level shortwave will slowly
cross the region Friday afternoon through Sunday morning with
several rounds of storms possible. With limited temperature
advection and partly cloudy skies, temperatures through the first
half of the extended will average below normal. Upper level ridging
and WAA will develop on Sunday with temperatures climbing above
normal for most locations. Warmer temps are expected Monday and
Tuesday.

&&

.AVIATION...(For the 18Z TAFS through 18Z Wednesday Afternoon)
Issued at 1250 PM CDT TUE JUL 26 2016

An area of low pressure crossing the region will being showers and
thunderstorms to all terminals through this evening. Some
thunderstorms could be strong with torrential rainfall and small
hail possible. Brief periods of MVFR/IFR visibilities are possible
with the stronger storms. MVFR cigs will be possible Wednesday
morning behind the low pressure system.

&&

.ABR Watches/Warnings/Advisories...
SD...NONE.
MN...NONE.
&&

SHORT TERM...Mohr
LONG TERM...SD
AVIATION...SD

Hazardous weather outlook, Jul 26, 3:47 AM CDT, 13 hours 25 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ABERDEEN SD
347 AM CDT TUE JUL 26 2016

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-271100-
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-
347 AM CDT TUE JUL 26 2016 /247 AM MDT TUE JUL 26 2016/

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. THERE IS THE POTENTIAL FOR SOME
STORMS TO BECOME STRONG TO SEVERE...ESPECIALLY LATE THIS AFTERNOON
THROUGH THIS EVENING. HAIL AND GUSTY WINDS WILL BE THE PRIMARY
THREAT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON THROUGH THIS
EVENING.

KF

In the hours before

Local storm report, Jul 26, 2:06 PM CDT, 3 hours 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
206 PM CDT TUE JUL 26 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0140 PM     TSTM WND GST     7 N FREDERICK           45.93N 98.53W
07/26/2016  M70 MPH          BROWN              SD   MESONET

            .

&&

NWS ABERDEEN SD
IRIS SYSTEM

Special weather statement, Jul 26, 2:10 PM CDT, 3 hours 2 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
210 PM CDT TUE JUL 26 2016

SDZ018-037-262000-
SPINK SD-HAND SD-
210 PM CDT TUE JUL 26 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN SPINK AND
NORTHEASTERN HAND COUNTIES UNTIL 300 PM CDT...

AT 210 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
NEAR BURDETTE...OR 9 MILES NORTHEAST OF MILLER...MOVING SOUTHEAST AT
10 MPH.

DIME SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
BURDETTE...SPOTTSWOOD AND VAYLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4460 9906 4480 9894 4470 9846 4463 9851
      4463 9871 4443 9871
TIME...MOT...LOC 1910Z 298DEG 10KT 4464 9891

SRF

Local storm report, Jul 26, 2:47 PM CDT, 2 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
247 PM CDT TUE JUL 26 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0240 PM     HEAVY RAIN       2 SW SPRING CREEK COLON 45.89N 98.91W
07/26/2016  M3.80 INCH       MCPHERSON          SD   PUBLIC

            RAINFALL SINCE 6 AM. CREEKS ARE RUNNING HIGH
            BUT NOT CAUSING ANY ISSUES.

&&

SRF

Local storm report, Jul 26, 3:29 PM CDT, 1 hour 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
329 PM CDT TUE JUL 26 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0320 PM     HEAVY RAIN       8 N SAINT LAWRENCE      44.63N 98.94W
07/26/2016  M4.50 INCH       HAND               SD   EMERGENCY MNGR

            RAINFALL FROM AFTERNOON STORM. PONDING OF
            WATER LEADING TO SOME MINOR FLOODING.

&&

RV

Local storm report, Jul 26, 4:06 PM CDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
406 PM CDT TUE JUL 26 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0355 PM     HEAVY RAIN       6 S BURDETTE            44.61N 98.81W
07/26/2016  M3.23 INCH       HAND               SD   PUBLIC

            RAINFALL FROM AFTERNOON STORM. RAIN SOAKED
            INTO THE GROUND...NO FLOODING OCCURRING.

&&

RV

Special weather statement, Jul 26, 5:01 PM CDT, 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
501 PM CDT TUE JUL 26 2016

SDZ048-051-262300-
LYMAN SD-BUFFALO SD-
501 PM CDT TUE JUL 26 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BUFFALO AND
NORTHEASTERN LYMAN COUNTIES UNTIL 600 PM CDT...

AT 500 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
COUNSELOR CREEK BOAT ACCESS AREA...OR 7 MILES SOUTHWEST OF FORT
THOMPSON...MOVING EAST AT 15 MPH.

NICKEL SIZE HAIL AND WIND GUSTS OF 50 TO 55 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
FORT THOMPSON...TAILRACE REC AREA...LEES CORNER...
COUNSELOR CREEK BOAT ACCESS AREA...
CROW CREEK HOUSING AND LAKE FRANCIS CASE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4388 9958 4407 9957 4412 9918 4393 9921
      4393 9935 4390 9936 4387 9931 4382 9934
TIME...MOT...LOC 2200Z 273DEG 15KT 4398 9952

DORN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 12:55 AM CDT	Special Weather Statement	ABR	Campbell	65 min
Jul 26, 2:19 AM CDT	Special Weather Statement	ABR	Campbell, McPherson	56 min
Jul 26, 6:38 AM CDT	Special Weather Statement	ABR	McPherson	52 min
Jul 26, 6:40 AM CDT	Severe Thunderstorm Warning	ABR	McPherson	17 min
Jul 26, 7:10 AM CDT	Special Weather Statement	ABR	McPherson	50 min
Jul 26, 8:50 AM CDT	Special Weather Statement	ABR	Brown	25 min
Jul 26, 8:59 AM CDT	Special Weather Statement	ABR	McPherson	46 min
Jul 26, 9:47 AM CDT	Special Weather Statement	ABR	McPherson	43 min
Jul 26, 9:53 AM CDT	Severe Thunderstorm Warning	ABR	McPherson	37 min
Jul 26, 10:56 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Clark, Day, Spink	20 min
Jul 26, 12:02 PM CDT	Special Weather Statement	ABR	Edmunds	43 min
Jul 26, 12:25 PM CDT	Special Weather Statement	ABR	Spink	50 min
Jul 26, 12:51 PM CDT	Special Weather Statement	ABR	Spink	39 min
Jul 26, 1:02 PM CDT	Special Weather Statement	ABR	Clark	43 min
Jul 26, 2:10 PM CDT	Special Weather Statement	ABR	Hand	50 min
Jul 26, 5:01 PM CDT	Special Weather Statement	ABR	Buffalo	59 min
Jul 26, 5:19 PM CDT	Severe Thunderstorm Warning	ABR	Lyman	56 min
Jul 26, 5:35 PM CDT	Special Weather Statement	ABR	Stanley	25 min
Jul 26, 6:01 PM CDT	Special Weather Statement	ABR	Stanley	44 min
Jul 26, 6:11 PM CDT	Severe Thunderstorm Warning	ABR	Lyman	49 min
Jul 26, 6:29 PM CDT	Special Weather Statement	ABR	Stanley	46 min
Jul 26, 6:33 PM CDT	Special Weather Statement	ABR	Jones	42 min
Jul 26, 6:43 PM CDT	Severe Thunderstorm Warning	ABR	Jones	47 min
Jul 26, 6:51 PM CDT	Special Weather Statement	ABR	Lyman	39 min

Nearby

Flash Flood Warnings in South Dakota, 2016 Every flash flood warning in 2016

Sources

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