Alert archive / Iowa / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 17, NWS Omaha, NE

April 27, 2016Fremont County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at Apr 27, 2016, 2:26 PM CDT for Fremont County, Iowa. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 27, 2016, 2:26 PM CDT (19:26 UTC)
Expired: Apr 27, 2016, 3:15 PM CDT
In force: 49 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 50.0 mph

County Fremont County, IA

The radar

The Omaha radar (KOAX), 90 km from the middle of the area, began a volume at 19:27 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

Omaha, NE (KOAX), launched 12:00Z, 7.4 hours before the alert went out and 91 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: 514 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 268 m²/s²
0-3 km storm-relative helicity: 345 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 severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Omaha, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 27, 1:52 PM CDT, 34 minutes earlier.

Area forecast discussion, Apr 27, 1:52 PM CDT, 34 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
152 PM CDT WED APR 27 2016

.UPDATE...
ISSUED AT 144 PM CDT WED APR 27 2016

SURFACE LOW REMAINS PARKED IN THE PLATTE RIVER VALLEY WEST
SOUTHWEST OF COLUMBUS AT 18Z. SUBJECTIVE SURFACE ANALYSIS COMBINED
WITH BOUNDARIES NOTED ON KOAX RADAR SHOW THE OCCLUSION POINT WAS
BETWEEN LINCOLN AND WAHOO. CONVECTION HAS BEGUN TO DEVELOP ALONG
THE VARIOUS BOUNDARIES. CONVECTION ALLOWING MODELS OF HRRR...
EXPERIMENTAL HRRR AS NSSL 4KM SUGGEST MINI SUPER CELL STORMS WILL
DEVELOP FROM NEAR FREMONT EAST SOUTHEAST ALONG THE WARM FRONT.
THESE WOULD BE LOW TOPPED STORMS. OF SOME CONCERN IS THE TRIPLE
POINT WHERE SOME ROTATION MAY BE DEVELOPING JUST SOUTH OF OUR
OFFICE. SURFACE BASED CAPE IS 1000-1500 J/KG IN THE WARM SECTOR.
0-3KM CAPE IS 100-125 J/KG...WITH STEEP LOW LEVEL LAPSE RATES. WE
COORDINATED WITH SPC EARLIER IN THE DAY TO PULL THE SLIGHT RISK OF
SEVERE STORMS FURTHER WEST...AND ALSO BRING 2 PERCENT TORNADO
PROBABILITIES INTO THE REGION. THERE IS A SMALL WINDOW OF STORMS
OF ABOUT 1-2 HOURS AT ANY GIVEN LOCATION AS THESE STORMS SHIFT
NORTH. FREEZING LEVEL IS LOW...AROUND 8000 FEET. THUS 50DBZ
HEIGHTS WOULD BE QUITE LOW FOR HAIL...WHICH COULD BE 1 TO 1.5
INCHES.

&&

.SHORT TERM...(TODAY THROUGH FRIDAY)
ISSUED AT 307 AM CDT WED APR 27 2016

NEGATIVELY TILTED AND ELONGATE UPPER TROUGH AXIS CURRENTLY
EXTENDS FROM SOUTHEASTERN MONTANA INTO NORTHEAST COLORADO TO THE
BASE IN THE OKLAHOMA PANHANDLE/SOUTHWESTERN KANSAS. WIDESPREAD
SHOWERS AND ISOLATED THUNDERSTORMS CONTINUE TO SPIRAL AROUND THE
SYSTEM THIS MORNING WITH THE SFC LOW AT 08Z LOCATED OVER NORTH
CENTRAL KANSAS.

AS THE SURFACE LOW MOVES NORTHEAST INTO SOUTHEAST NEBRASKA TODAY...THE
COLD CLOSED UPPER LOW WILL TIGHTEN UP AND SHIFT NORTHEAST...SLIGHTLY
BEHIND THE SFC LOW. INGREDIENTS SEEM TO BE COMING TOGETHER FOR
WHAT COULD BE A CLASSIC MINI-SUPERCELL EVENT. THE TRIPLE POINT
BY 18-21Z IS FORECAST TO EXTEND FROM EAST CENTRAL NEBRASKA INTO
SOUTHWEST IOWA. LATEST CAM'S SHOW DEVELOPMENT GENERALLY ALONG AND
EAST OF THE MISSOURI RIVER BY MID/LATE AFTERNOON AND QUICKLY
SPREAD THIS ACTIVITY NORTHEAST AS BOTH THE UPPER LOW AND SFC LOW
MOVE INTO E/NE EVENING. COOLER AIR...WITH EVEN A FEW HINTS OF 0C
850MB TEMPS...WRAP INTO THIS LOW TONIGHT WITH DEFORMATION BAND
SETTING UP ACROSS NORTHEAST NEBRASKA. WILL BE A CHILLY WET NIGHT
ACROSS MUCH OF OUR NORTHERN COUNTIES.

UPPER LOW EXITS EAST OF THE CWA THURSDAY AFTERNOON ENDING ANY
REMAINING PCPN CHANCES OVER OUR NORTHERN COUNTIES. COLD AIR
ADVECTION CONTINUES TO SETTLE SOUTH AS SFC HIGH PRESSURE OVER THE
NORTHERN PLAINS DROPS INTO THE AREA. THURSDAY NIGHT/FRIDAY MORNING
LOWS COULD BOTTOM OUT IN THE UPPER 30S IN OUR NORTH TO LOWER 40S
IN OUR SOUTH. WEAK UPPER RIDGING WILL BUILD OVERHEAD FRIDAY AHEAD
OF THE NEXT LARGE UPPER TROUGH WHICH WILL BE ROUNDING THE FOUR
CORNERS REGION AT THAT TIME.

.LONG TERM...(FRIDAY NIGHT THROUGH TUESDAY)
ISSUED AT 307 AM CDT WED APR 27 2016

PCPN CHANCES INCREASE FROM SOUTHWEST TO NORTHEAST FRIDAY EVENING
AS LARGE SCALE FORCING INCREASES WITH APPROACH OF UPPER LOW. ISENTROPIC
UPGLIDE ALSO WILL BE INCREASING IN WAA ZONE ACROSS OUR
SOUTHEASTERN COUNTIES. PCPN CHANCES CONTINUE THROUGH SATURDAY AND
MUCH OF SUNDAY AS THE UPPER LOW SLOWLY SHIFTS EAST OF THE AREA BY
SUNDAY NIGHT. DRIER CONDITIONS ARE FINALLY ON THE HORIZON FOR MID
TO LATE NEXT WEEK.

&&

.AVIATION...(18Z TAFS FOR KOMA...KLNK...KOFK THROUGH 18Z THURSDAY)
ISSUED AT 144 PM CDT WED APR 27 2016

BELIEVE THUNDERSTORMS COULD AFFECT KOMA/KOFK FROM 19-21Z AS A
FRONTAL BOUNDARY CONTINUES TO ARC NORTHWARD. OTHERWISE...IT'S
MOSTLY MVFR INITIALLY...BUT PROBABLY BECOMING IFR THROUGH THE
NIGHT. ALSO A COMPLICATED WIND FORECAST AS SURFACE LOW PRESSURE
MOVES THROUGH THE REGION.

&&

.OAX WATCHES/WARNINGS/ADVISORIES...
NE...NONE.
IA...NONE.
&&

UPDATE...DEWALD
SHORT TERM...KERN
LONG TERM...KERN
AVIATION...DEWALD

Hazardous weather outlook, Apr 27, 11:49 AM CDT, 2 hours 37 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1149 AM CDT WED APR 27 2016

NEZ011-012-015>018-030>032-042-065-078-088-089-280700-
KNOX-CEDAR-THURSTON-ANTELOPE-PIERCE-WAYNE-BOONE-MADISON-STANTON-
PLATTE-SEWARD-SALINE-JEFFERSON-GAGE-
1149 AM CDT WED APR 27 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
NEBRASKA AND SOUTHEAST NEBRASKA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

ISOLATED THUNDERSTORMS COULD OCCUR THIS AFTERNOON...BUT IN GENERAL
SEVERE STORMS ARE NOT EXPECTED IN THIS AREA.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

CHANCES FOR ISOLATED THUNDERSTORMS RETURN FRIDAY NIGHT THROUGH
SATURDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION SHOULD NOT BE NEEDED THIS AFTERNOON THROUGH
TONIGHT.

IAZ043-055-056-069-079-080-090-091-NEZ033-034-043>045-050>053-
066>068-090>093-280700-
MONONA-HARRISON-SHELBY-POTTAWATTAMIE-MILLS-MONTGOMERY-FREMONT-
PAGE-CUMING-BURT-COLFAX-DODGE-WASHINGTON-BUTLER-SAUNDERS-DOUGLAS-
SARPY-LANCASTER-CASS-OTOE-JOHNSON-NEMAHA-PAWNEE-RICHARDSON-
1149 AM CDT WED APR 27 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
IOWA...WEST CENTRAL IOWA...EAST CENTRAL NEBRASKA...NORTHEAST
NEBRASKA AND SOUTHEAST NEBRASKA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG A WARM FRONT
THAT EXTENDS FROM NEAR COLUMBUS NEBRASKA EAST SOUTHEAST TO NEAR
SHENANDOAH IOWA. STORMS COULD BECOME SEVERE THIS AFTERNOON WITH
ONE TO ONE AND ONE HALF INCH HAIL POSSIBLE...ESPECIALLY FROM
FREMONT EAST SOUTHEASTWARD IN INTO SOUTHWEST IOWA JUST NORTH OF
THE FRONTAL BOUNDARY. THERE IS ALSO ALSO A VERY SMALL RISK FOR AN
ISOLATED TORNADO AND DAMAGING WINDS. STORMS ARE FORECAST TO
INITIALLY DEVELOP 1 TO 2 PM...AND COULD LINGER THROUGH 5 TO 7 PM
AS THEY SHIFT NORTHWARD.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

CHANCES FOR ISOLATED THUNDERSTORMS RETURN FRIDAY NIGHT THROUGH
SATURDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED ACROSS PORTIONS OF THE AREA
THIS AFTERNOON AND EVENING.

DEWALD

In the hours before

Special weather statement, Apr 27, 2:04 PM CDT, 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
204 PM CDT WED APR 27 2016

NEZ033-034-043-044-051-271930-
DODGE NE-COLFAX NE-SAUNDERS NE-BURT NE-CUMING NE-
204 PM CDT WED APR 27 2016

...SIGNIFICANT WEATHER ADVISORY FOR DODGE...SOUTHEASTERN CUMING...
NORTHEASTERN COLFAX...NORTH CENTRAL SAUNDERS AND WESTERN BURT
COUNTIES UNTIL 230 PM CDT...

AT 204 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 4
MILES NORTH OF CEDAR BLUFFS...OR 34 MILES NORTHWEST OF OMAHA...MOVING
NORTH AT 30 MPH.

DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
FREMONT...NORTH BEND...SCRIBNER...HOOPER...DODGE...CEDAR BLUFFS...
INGLEWOOD...SNYDER...UEHLING...WINSLOW...FREMONT LAKES STATE RECREATION
AREA...7 MILES NORTH OF NORTH BEND...CAMP EAGLE...DEAD TIMBER STATE
RECREATION AREA AND CAMP CEDARS.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 HIGHWAY 275 IN NEBRASKA BETWEEN MILE MARKERS 124 AND 140.
 HIGHWAY 30 IN NEBRASKA BETWEEN MILE MARKERS 414 AND 426.
 HIGHWAY 77 IN NEBRASKA BETWEEN MILEMARKERS 112 AND 136.

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 4141 9648 4136 9671 4172 9693 4177 9649
TIME...MOT...LOC 1904Z 165DEG 28KT 4146 9663

MILLER

Local storm report, Apr 27, 2:12 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
212 PM CDT WED APR 27 2016

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

0210 PM     FUNNEL CLOUD     3 W FREMONT             41.44N 96.55W
04/27/2016                   DODGE              NE   LAW ENFORCEMENT

            STATE TROOPER OBSERVED A BRIEF FUNNEL CLOUD...BUT
            DISSIPATED QUICKLY.

&&

VDEWALD

Local storm report, Apr 27, 2:13 PM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
213 PM CDT WED APR 27 2016

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

0213 PM     HAIL             2 S CEDAR CREEK         41.02N 96.10W
04/27/2016  E0.25 INCH       CASS               NE   TRAINED SPOTTER

&&

PEARSON

Special weather statement, Apr 27, 2:14 PM CDT, 12 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
214 PM CDT WED APR 27 2016

IAZ069-079-090-NEZ045-052-053-067-068-091-093-271945-
FREMONT IA-MILLS IA-POTTAWATTAMIE IA-NEMAHA NE-DOUGLAS NE-
RICHARDSON NE-CASS NE-OTOE NE-WASHINGTON NE-SARPY NE-
214 PM CDT WED APR 27 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN POTTAWATTAMIE...
WESTERN MILLS...FREMONT...CENTRAL RICHARDSON...EASTERN CASS...EASTERN
DOUGLAS...CENTRAL NEMAHA...SOUTHEASTERN WASHINGTON...EASTERN OTOE AND
SARPY COUNTIES UNTIL 245 PM CDT...

AT 213 PM CDT...DOPPLER RADAR WAS TRACKING A LINE OF STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM NEAR CEDAR CREEK TO NEAR
RESERVE...AND MOVING NORTH AT 40 MPH.

DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THESE STORMS. THERE IS ALSO SOME POTENTIAL FOR BRIEF SPINUPS ALONG
THIS LINE...WHICH COULD PRODUCE BRIEF TORNADOES.

LOCATIONS IMPACTED INCLUDE...
OMAHA...FALLS CITY...COUNCIL BLUFFS...BELLEVUE...PAPILLION...LA VISTA...
NEBRASKA CITY...PLATTSMOUTH...RALSTON...GLENWOOD...AUBURN...SPRINGFIELD...
HAMBURG...SIDNEY...LOUISVILLE...PERU...PACIFIC JUNCTION...MURRAY...CEDAR
CREEK AND RIVERTON.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 HIGHWAY 136 IN NEBRASKA BETWEEN MILE MARKERS 230 AND 240.
 HIGHWAY 2 IN NEBRASKA BETWEEN MILE MARKERS 499 AND 508.
 HIGHWAY 34 IN IOWA BETWEEN MILE MARKERS 1 AND 11.
 HIGHWAY 75 IN NEBRASKA BETWEEN MILE MARKERS 29 AND 97.
 INTERSTATE 29 BETWEEN MILE MARKERS 1 AND 66.
 INTERSTATE 80 IN IOWA BETWEEN MILE MARKERS 1 AND 5.
 INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 439 AND 454.

LAT...LON 4109 9621 4146 9589 4058 9544 4058 9577
      4053 9577 4056 9568 4054 9565 4051 9570
      4043 9564 4034 9562 4031 9566 4030 9556
      4026 9555 4024 9547 4018 9548 4012 9539
      4004 9541 4001 9532 4000 9531 4000 9565
TIME...MOT...LOC 1913Z 188DEG 34KT 4101 9609 4000 9561

MILLER

Local storm report, Apr 27, 2:18 PM CDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
218 PM CDT WED APR 27 2016

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

0218 PM     HAIL             CEDAR CREEK             41.05N 96.10W
04/27/2016  M0.88 INCH       CASS               NE   TRAINED SPOTTER

&&

VDEWALD

Local storm report, Apr 27, 2:23 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NEBRASKA
223 PM CDT WED APR 27 2016

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

0222 PM     FUNNEL CLOUD     5 N CLARINDA            40.81N 95.04W
04/27/2016                   PAGE               IA   TRAINED SPOTTER

&&

PEARSON

The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 26, 7:16 PM CDT	Special Weather Statement	OAX	Saunders	29 min
Apr 26, 9:54 PM CDT	Special Weather Statement	OAX	Seward	36 min
Apr 26, 10:30 PM CDT	Special Weather Statement	OAX	Seward	30 min
Apr 27, 9:30 AM CDT	River Flood Warning	OAX	Saunders	40 hr
Apr 27, 9:51 AM CDT	River Flood Warning	OAX	Nemaha	12 days
Apr 27, 9:51 AM CDT	River Flood Warning	OAX	Richardson	11 days
Apr 27, 1:50 PM CDT	Special Weather Statement	OAX	Saunders	25 min
Apr 27, 1:53 PM CDT	Severe Thunderstorm Warning	OAX	Dodge, Douglas, Saunders, Washington	37 min
Apr 27, 2:04 PM CDT	Special Weather Statement	OAX	Dodge	26 min
Apr 27, 2:14 PM CDT	Special Weather Statement	OAX	Sarpy	31 min
Apr 27, 2:40 PM CDT	Severe Thunderstorm Warning	OAX	Dodge, Douglas, Saunders, Washington	50 min
Apr 27, 2:56 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Sarpy	49 min
Apr 27, 3:14 PM CDT	Special Weather Statement	OAX	Douglas	46 min
Apr 27, 3:27 PM CDT	Severe Thunderstorm Warning	OAX	Dodge, Washington	33 min
Apr 27, 3:37 PM CDT	Tornado Warning	OAX	Douglas	23 min
Apr 27, 3:48 PM CDT	Severe Thunderstorm Warning	OAX	Douglas, Sarpy	27 min
Apr 27, 4:18 PM CDT	Special Weather Statement	OAX	Sarpy	42 min
Apr 27, 4:42 PM CDT	Special Weather Statement	OAX	Douglas	33 min
Apr 27, 5:01 PM CDT	Areal Flood Warning	OAX	Dodge, Douglas, Sarpy, Washington	3 hr
Apr 27, 2:36 PM CDT	Tornado Warning	OAX	Montgomery, Page	24 min
Apr 27, 2:45 PM CDT	Tornado Warning	OAX	Fremont	45 min
Apr 27, 2:59 PM CDT	Tornado Warning	OAX	Montgomery, Page	31 min
Apr 27, 3:23 PM CDT	Tornado Warning Tornado observed	OAX	Montgomery	37 min
Apr 27, 3:26 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Page	32 min
Apr 27, 3:49 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills, Montgomery, Page	41 min
Apr 27, 3:54 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery, Pottawattamie	36 min
Apr 27, 4:48 PM CDT	Areal Flood Advisory	OAX	Montgomery, Page	4 hr
Apr 27, 5:14 PM CDT	Special Weather Statement	OAX	Montgomery	46 min
Apr 27, 6:04 PM CDT	Flash Flood Warning	OAX	Montgomery, Page	5 hr

Nearby

Severe Thunderstorm Warnings in Iowa, 2016 Every severe thunderstorm 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.