Alert archive / Iowa / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 14, NWS Omaha, NE

March 19, 2020Page County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at Mar 19, 2020, 7:18 PM CDT for Page County, Iowa. It was in force for 18 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
Mar 19, 2020, 7:18 PM CDT (00:18 UTC)
Expired
Mar 19, 2020, 7:36 PM CDT
In force
18 min
Issued by
NWS Omaha, NE
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Page County, IA

The radar

The Omaha radar (KOAX), 121 km from the middle of the area, began a volume at 00:17 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Mar 19, 3:29 PM CDTTornado WatchSPC8 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 0.3 hours before the alert went out and 121 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, Omaha, NE at 00:00Z on 2020-03-20Temperature 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, Omaha, NE at 00:00Z on 2020-03-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 204 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
582 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
204 m²/s²
0-3 km storm-relative helicity
425 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

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 Mar 19, 6:39 PM CDT, 39 minutes earlier.

Area forecast discussion, Mar 19, 6:39 PM CDT, 39 minutes before
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Hazardous weather outlook, Mar 19, 3:38 PM CDT, 3 hours 40 minutes before
Hazardous Weather Outlook
National Weather Service Omaha/Valley NE
338 PM CDT Thu Mar 19 2020

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-201045-
Monona-Harrison-Shelby-Pottawattamie-Mills-Montgomery-Fremont-
Page-Knox-Cedar-Thurston-Antelope-Pierce-Wayne-Boone-Madison-
Stanton-Cuming-Burt-Platte-Colfax-Dodge-Washington-Butler-
Saunders-Douglas-Sarpy-Seward-Lancaster-Cass-Otoe-Saline-
Jefferson-Gage-Johnson-Nemaha-Pawnee-Richardson-
338 PM CDT Thu Mar 19 2020

This Hazardous Weather Outlook is for portions of southwest
Iowa...west central Iowa...east central Nebraska...northeast
Nebraska and southeast Nebraska.

.DAY ONE...Tonight and Friday

Severe thunderstorms are likely into the evening as a strong
storm system moves through the region. Most of the severe storms
will occur south of a warm front extending through southeast
Nebraska and southwest Iowa, generally south of a line from
Saline to Plattsmouth and Oakland Iowa. Large hail, damaging
winds, and isolated tornadoes are possible in these areas. Large
hail could occur north of this area, generally from Lincoln to the
Omaha Metro and to Harlan Iowa. The storms are forecast to move
east of our area by mid evening.

Also, a winter weather advisory is in effect through tonight for
northeast Nebraska. Rain will change to snow this evening, with
total snow amounts in the 1 to 4 inch range, especially north of
a line from Albion to West Point and Onawa. Along with the snow,
north winds gusting over 40 mph will cause blowing snow, severely
reducing visibilities.

The rain and snow is expected to be east of our area by sunrise
Friday.

.DAYS TWO THROUGH SEVEN...Friday night through Thursday

There is a small chance of snow for parts of the area Saturday
night into Sunday morning. A few thunderstorms will be possible
from Monday night through Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to call in any severe weather reports
through this evening. There is a chance storm spotter activation
may be needed.

In the hours before

Local storm report, Mar 19, 5:24 PM CDT, 1 hour 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
524 PM CDT THU MAR 19 2020

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

0518 PM     HAIL             2 W OMAHA               41.26N 96.05W
03/19/2020  E1.00 INCH       DOUGLAS            NE   PUBLIC

0514 PM     HAIL             3 SE BOYS TOWN          41.23N 96.09W
03/19/2020  E1.00 INCH       DOUGLAS            NE   PUBLIC

&&
Local storm report, Mar 19, 5:29 PM CDT, 1 hour 49 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
529 PM CDT THU MAR 19 2020

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

0524 PM     HAIL             2 NNW RALSTON           41.23N 96.05W
03/19/2020  E0.88 INCH       DOUGLAS            NE   PUBLIC

&&

TSN
Local storm report, Mar 19, 5:54 PM CDT, 1 hour 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
554 PM CDT THU MAR 19 2020

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

0553 PM     HAIL             RED OAK                 41.01N 95.22W
03/19/2020  E2.00 INCH       MONTGOMERY         IA   EMERGENCY MNGR

&&

TSN
Local storm report, Mar 19, 6:00 PM CDT, 1 hour 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
600 PM CDT THU MAR 19 2020

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

0559 PM     HAIL             1 N RED OAK             41.02N 95.23W
03/19/2020  E1.25 INCH       MONTGOMERY         IA   PUBLIC

&&

TSN
Local storm report, Mar 19, 6:18 PM CDT, 1 hour before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
618 PM CDT THU MAR 19 2020

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

0550 PM     HAIL             RED OAK                 41.01N 95.22W
03/19/2020  M0.88 INCH       MONTGOMERY         IA   PUBLIC

&&

TSN
Local storm report, Mar 19, 6:34 PM CDT, 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
634 PM CDT THU MAR 19 2020

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

0633 PM     HAIL             RULO                    40.05N 95.43W
03/19/2020  E0.75 INCH       RICHARDSON         NE   PUBLIC

&&

BLB

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 19, 9:10 PM CDTRiver Flood WarningOAXOtoe4 days
Mar 19, 9:10 PM CDTRiver Flood WarningOAXNemaha4 days
Mar 19, 9:10 PM CDTRiver Flood WarningOAXRichardson5 days

Nearby

Severe Thunderstorm Warnings in Iowa, 2020Every severe thunderstorm warning 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.