Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 97, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 12, 1994, 9:26 PM CDT for Humboldt County, Iowa. It was in force for 34 min.
The area
The counties it named.
The facts
- Issued
- Jun 12, 1994, 9:26 PM CDT (02:26 UTC)
- Expired
- Jun 12, 1994, 10:00 PM CDT
- In force
- 34 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Humboldt County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 2.4 hours before the alert went out and 236 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1268 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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, Jun 12, 7:45 PM CDT, 1 hour 41 minutes before
IAZALL-130140- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 745 PM CDT SUN JUN 12 1994 ...TORNADO WATCH IN EFFECT FOR WESTERN AND CENTRAL IOWA UNTIL 1000 PM CDT THIS SUNDAY EVENING... AT 730 PM...INTENSE THUNDERSTORMS WERE LOCATED OVER EXTREME NORTHWEST IOWA. THESE STORMS WERE LLOCATED AROUND SPIRIT LAKE AND ROCK RAPIDS. HAIL...BRIEF TORENTIAL DOWNPOURS...WINDS GUSTS IN EXCESS OF 40 MILES AN HOUR AND NEARLY CONTINUOUS DEADLY LIGHTNING CAN BE EXPECTED WITH THESE STORMS. THESE STORMS WERE PART OF AN EXPANDING AREA OF SHOWERS AND THUNDERSTORMS ALONG AND NORTH OF A LINE FROM 20 MILES NORTH OF SIOUX CITY NORTHEAST TO TO ESTHERVILLE. ESTHERVILLE IS 20 MILES NORTHEAST OF SPENCER. ANOTHER AREA OF SHOWERS AND ISOLATED THUNDERSTORMS WAS LOCATED OVER THE NORTHEAST QUARTER OF IOWA. THIS AREA WAS NORTHEAST OF A LINE FROM 10 MILES EAST OF MASON CITY SOUTHEAST TO 10 MILES NORTH OF CEDAR RAPIDS. THE SHOWERS AND STORMS WERE ALL MOVING EAST AT 30 TO 35 MILES AN HOUR. BARLOW
Special weather statement, Jun 12, 8:13 PM CDT, 1 hour 13 minutes before
IAZ006>011-016>019-026>029-038>040-130215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 813 PM CDT SUN JUN 12 1994 ...A TORNADO WATCH CONTINUES FOR PORTIONS OF NORTH CENTRAL IOWA UNTIL 10 PM TONIGHT... AT 810 PM...NATIONAL WEATHER SERVICE RADAR IN WATERLOO WAS SHOWING SEVERE THUNDERSTORMS CONTINUING IN NORTHWEST IOWA...ALONG THE IOWA/ MINNESOTA BORDER. THESE THUNDERSTORMS WERE MOVING EAST SOUTHEAST AT 35 MPH. NORTH CENTRAL IOWANS WILL SEE SHOWER AND THUNDERSTORM ACTIVITY REDEVELOPING IN THE BRITT...BUFFALO CENTER AND LAKE MILLS AREAS AFTER 930 PM CDT. SOME OF THESE STORMS MAY TURN SEVERE PRODUCING LARGE HAIL...DAMAGING THUNDERSTORM WINDS...TORRENTIAL RAINS AND POSSIBLY TORNADOES. A TORNADO WATCH REMAINS IN EFFECT FOR THOSE SECTIONS OF NORTH CENTRAL IOWA ALONG AND TO THE WEST OF I-35. STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL RADIO OR TV STATION FOR LATER STATEMENTS OR WARNINGS CONCERNING THIS SEVERE WEATHER SITUATION. TRS
Special weather statement, Jun 12, 8:17 PM CDT, 1 hour 9 minutes before
IAZ006>011-016>019-026>029-038>040-130215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 813 PM CDT SUN JUN 12 1994 ...A TORNADO WATCH CONTINUES FOR PORTIONS OF NORTH CENTRAL IOWA UNTIL 10 PM TONIGHT... AT 810 PM...NATIONAL WEATHER SERVICE RADAR IN WATERLOO WAS SHOWING SEVERE THUNDERSTORMS CONTINUING IN NORTHWEST IOWA...ALONG THE IOWA/ MINNESOTA BORDER. THESE THUNDERSTORMS WERE MOVING EAST SOUTHEAST AT 35 MPH. NORTH CENTRAL IOWANS WILL SEE SHOWER AND THUNDERSTORM ACTIVITY REDEVELOPING IN THE BRITT...BUFFALO CENTER AND LAKE MILLS AREAS AFTER 930 PM CDT. SOME OF THESE STORMS MAY TURN SEVERE PRODUCING LARGE HAIL...DAMAGING THUNDERSTORM WINDS...TORRENTIAL RAINS AND POSSIBLY TORNADOES. A TORNADO WATCH REMAINS IN EFFECT FOR THOSE SECTIONS OF NORTH CENTRAL IOWA ALONG AND TO THE WEST OF I-35. STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL RADIO OR TV STATION FOR LATER STATEMENTS OR WARNINGS CONCERNING THIS SEVExRE WEATHER SITUATION. TRS
Special weather statement, Jun 12, 8:40 PM CDT, 46 minutes before
IAZALL-130240- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 840 PM CDT SUN JUN 12 1994 ...TORNADO WATCH IN EFFECT FOR WESTERN AND CENTRAL IOWA UNTIL 1000 PM CDT THIS SUNDAY EVENING... AT 829 PM...INTENSE THUNDERSTORMS CONTINUED OVER THE NORTHWEST QUARTER OF IOWA. THE STRONGEST STORMS WERE LOCATED IN A 25 MILE WIDE AREA FROM HAWARDEN NORTHEAST THROUGH SPENCER TO 10 MILES EAST OF ESTHERVILLE. SEVERAL OF THE STORMS IN THIS AREA WILL PRODUCE TORRENTIAL DOWNPOURS...HAIL...STRONG THUNDERSTORM WINDS AND DEADLY CLOUD TO GROUND LIGHTNING. HAWARDEN IS 35 MILES NORTH OF SIOUX CITY. THESE STORMS WERE PART OF AN EXPANDING AREA OF SHOWERS AND STORMS ALONG AND NORTH OF A LINE FROM 10 MILES NORTH OF SIOUX CITY TO THE IOWA/MINNESOTA BORDER 20 MILES OF MASON CITY. ANOTHER CLUSTER OF VERY STRONG THUNDERSTORMS WAS APPROACHING THE SIOUX CITY AND ONAWA AREAS FROM EASTERN NEBRASKA...AND SHOULD BE MOVING INTO THESE AREAS BY 915 PM. THE SHOWERS AND STORMS WERE MOVING EAST SOUTHEAST AT 30 MILES AN HOUR. BARLOW
Special weather statement, Jun 12, 8:55 PM CDT, 31 minutes before
IAZ006>011-016>019-026>029-038>040-130300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 855 PM CDT SUN JUN 12 1994 ...A TORNADO WATCH CONTINUES FOR PORTIONS OF NORTH CENTRAL IOWA UNTIL 10 PM TONIGHT... AT 850 PM...NATIONAL WEATHER SERVICE RADAR IN WATERLOO WAS SHOWING SEVERE THUNDERSTORMS CONTINUING ACROSS THE NORTHWEST THIRD OF IOWA...ALONG THE IOWA/MINNESOTA BORDER. THESE THUNDERSTORMS WERE MOVING EAST SOUTHEAST AT 35 MPH. NORTH CENTRAL IOWANS WILL SEE THUNDERSTORM ACTIVITY MOVING THROUGH THE BRITT...BUFFALO CENTER AND FOREST CITY AREAS AFTER 900 PM CDT. THESE STORMS WILL EVENTUALLY REACH THE NORTHWOOD...CLEAR LAKE AND GARNER AREAS BY 930 PM. SOME OF THESE STORMS MAY TURN SEVERE PRODUCING LARGE HAIL...DAMAGING THUNDERSTORM WINDS...TORRENTIAL RAINS AND POSSIBLY TORNADOES. A TORNADO WATCH REMAINS IN EFFECT FOR THOSE PORTIONS OF NORTH CENTRAL IOWA TO THE WEST OF I-35 THROUGH 10 PM. AT SIGNS OF AN IMPENDING STORM...TOWERING THUNDERHEADS...DARKENING SKIES...LIGHTNING AND INCREASING WINDS...MOVE TO A PLACE OF SAFETY. TUNE IN NOAA WEATHER RADIO OR YOUR LOCAL RADIO OR TV STATION FOR THE LATEST WEATHER INFORMATION. TRS
Special weather statement, Jun 12, 8:59 PM CDT, 27 minutes before
IAZ006>011-016>019-026>029-038>040-130300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 855 PM CDT SUN JUN 12 1994 ...A TORNADO WATCH CONTINUES FOR PORTIONS OF NORTH CENTRAL IOWA UNTIL 10 PM TONIGHT... AT 850 PM...NATIONAL WEATHER SERVICE RADAR IN WATERLOO WAS SHOWING SEVERE THUNDERSTORMS CONTINUING ACROSS THE NORTHWEST THIRD OF IOWA...ALONG THE IOWA/MINNESOTA BORDER. THESE THUNDERSTORMS WERE MOVING EAST SOUTHEAST AT 35 MPH. NORTH CENTRAL IOWANS WILL SEE THUNDERSTORM ACTIVITY MOVING THROUGH THE BRITT...BUFFALO CENTER AND FOREST CITY AREAS AFTER 900 PM CDT. THESE STORMS WILL EVENTUALLY REACH THE NORTHWOOD...CLEAR LAKE AND GARNER AREAS BY 930 PM. SOME OF THESE STORMS MAY TURN SEVERE PRODUCING LARGE HAIL...DAMAGING THUNDERSTORM WINDS...TORRENTIAL RAINS AND POSSIBLY TORNADOES. A TORNADO WATCH REMAINS IN EFFECT FOR THOSE PORTIONS OF NORTH CENTRAL IOWA TO THE WEST OF I-35 THROUGH 10 PM. AT SIGNS OF AN IMPENDING STORM...TOWERING THUNDERHEADS...DARKENING SKIES...LIGHTNING AND INCREASING WINDS...MOVE TO A PLACE OF SAFETY. TUNE IN NOAA WEATHER RADIO OR YOUR LOCAL RADIO OR TV STATION FOR THE LATEST WEATHER INFORMATION. TRS
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 7:08 PM CDT | Tornado Warning | DMX | Dickinson | 37 min |
| Jun 12, 7:15 PM CDT | Severe Thunderstorm Warning | DMX | Emmet | 30 min |
| Jun 12, 7:45 PM CDT | Severe Thunderstorm Warning | DMX | Clay, Dickinson | 30 min |
| Jun 12, 8:15 PM CDT | Severe Thunderstorm Warning | DMX | Clay, Palo Alto | 30 min |
| Jun 12, 8:25 PM CDT | Tornado Warning | DMX | Palo Alto | 35 min |
| Jun 12, 8:55 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt, Kossuth | 35 min |
| Jun 12, 9:37 PM CDT | Severe Thunderstorm Warning | DMX | Webster | 38 min |
| Jun 12, 9:41 PM CDT | Tornado Warning | DMX | Wright | 34 min |
| Jun 12, 9:56 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Franklin | 34 min |
| Jun 12, 10:14 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton | 31 min |
| Jun 12, 10:58 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 47 min |
| Jun 12, 11:31 PM CDT | Severe Thunderstorm Warning | DMX | Fayette | 29 min |
| Jun 12, 11:38 PM CDT | Severe Thunderstorm Warning | DMX | Carroll | 22 min |
| Jun 13, 12:10 AM CDT | Severe Thunderstorm Warning | DMX | Adams | 14 min |
| Jun 13, 12:54 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas | 21 min |
| Jun 13, 1:03 AM CDT | Severe Thunderstorm Warning | DMX | Marion | 28 min |
| Jun 13, 1:03 AM CDT | Severe Thunderstorm Warning | DMX | Poweshiek | 28 min |
| Jun 13, 1:19 AM CDT | Severe Thunderstorm Warning | DMX | Mahaska | 26 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1994Every severe thunderstorm warning in 1994
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.