Alert archive / Iowa / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 147, NWS Omaha, NE

May 29, 1998Fremont County, Page County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at May 29, 1998, 3:38 AM CDT for Fremont County, Page County, Iowa. It was in force for 62 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
May 29, 1998, 3:38 AM CDT (08:38 UTC)
Expired
May 29, 1998, 4:40 AM CDT
In force
62 min
Issued by
NWS Omaha, NE
Area
Whole counties

Counties Fremont County, IA, Page County, IA

The radar

The Omaha radar (KOAX), 105 km from the middle of the area, began a volume at 08:40 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
May 28, 11:30 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 8.6 hours before the alert went out and 105 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 1998-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2835 joules per kilogram.LCLLFCEL10008507005003002001001 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 1998-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 64 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
2835 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
1954 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
64 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.1
Supercell composite
7.5

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Special weather statement, May 29, 1:50 AM CDT, 1 hour 48 minutes before
NEZ011-012-015>018-031>034-290720-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
150 AM CDT FRI MAY 29 1998

...SEVERE THUNDERSTORM WATCH #453 CANCELLED FOR NORTHEAST NEBRASKA...

THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR THE
FOLLOWING COUNTIES IN NORTHEAST NEBRASKA...KNOX...CEDAR...ANTELOPE...
PIERCE...WAYNE...THURSTON...MADISON...STANTON AND CUMING.

SCATTERED THUNDERSTORMS WILL BE POSSIBLE FOR THE REMAINDER OF THE
NIGHT ACROSS THE AREA BUT ARE EXPECTED TO REMAIN BELOW SEVERE LEVELS.

FOBERT

The office that day

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

IssuedProductOfficeCountiesLasted
May 28, 10:18 PM CDTTornado WarningOAXBurt62 min
May 28, 10:34 PM CDTSevere Thunderstorm WarningOAXWashington61 min
May 28, 10:56 PM CDTSevere Thunderstorm WarningOAXDodge49 min
May 28, 11:37 PM CDTSevere Thunderstorm WarningOAXColfax, Saunders48 min
May 28, 11:44 PM CDTSevere Thunderstorm WarningOAXDodge, Washington61 min
May 28, 11:57 PM CDTSevere Thunderstorm WarningOAXDouglas63 min
May 29, 12:29 AM CDTSevere Thunderstorm WarningOAXSaunders61 min
May 29, 12:43 AM CDTSevere Thunderstorm WarningOAXSarpy62 min
May 29, 1:02 AM CDTSevere Thunderstorm WarningOAXDouglas58 min
May 29, 1:42 AM CDTSevere Thunderstorm WarningOAXSaunders63 min
May 29, 1:49 AM CDTSevere Thunderstorm WarningOAXCass, Lancaster61 min
May 29, 1:55 AM CDTSevere Thunderstorm WarningOAXSarpy45 min
May 29, 2:31 AM CDTSevere Thunderstorm WarningOAXJefferson, Saline, Seward59 min
May 29, 2:51 AM CDTSevere Thunderstorm WarningOAXCass, Otoe64 min
May 29, 2:54 AM CDTSevere Thunderstorm WarningOAXGage, Lancaster61 min
May 29, 3:02 AM CDTSevere Thunderstorm WarningOAXJohnson, Pawnee63 min
May 29, 3:18 AM CDTSevere Thunderstorm WarningOAXNemaha, Richardson62 min
May 29, 3:45 AM CDTFlash Flood WarningOAXCass, Lancaster, Otoe3 hr
May 28, 8:40 PM CDTTornado WarningOAXMonona60 min
May 28, 9:40 PM CDTTornado WarningOAXMonona45 min
May 28, 10:25 PM CDTSevere Thunderstorm WarningOAXMonona35 min
May 28, 10:54 PM CDTTornado WarningOAXShelby61 min
May 28, 11:20 PM CDTSevere Thunderstorm WarningOAXHarrison60 min
May 29, 1:36 AM CDTSevere Thunderstorm WarningOAXMills, Montgomery59 min
May 29, 2:33 AM CDTSevere Thunderstorm WarningOAXFremont, Mills, Montgomery, Page47 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1998Every severe thunderstorm warning in 1998

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.